/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/rekh_ctm.2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:27:57,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:27:57,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:27:58,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:27:58,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:27:58,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:27:58,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:27:58,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:27:58,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:27:58,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:27:58,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:27:58,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:27:58,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:27:58,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:27:58,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:27:58,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:27:58,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:27:58,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:27:58,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:27:58,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:27:58,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:27:58,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:27:58,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:27:58,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:27:58,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:27:58,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:27:58,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:27:58,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:27:58,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:27:58,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:27:58,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:27:58,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:27:58,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:27:58,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:27:58,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:27:58,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:27:58,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:27:58,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:27:58,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:27:58,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:27:58,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:27:58,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:27:58,188 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:27:58,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:27:58,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:27:58,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:27:58,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:27:58,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:27:58,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:27:58,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:27:58,196 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:27:58,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:27:58,197 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:27:58,198 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:27:58,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:27:58,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:27:58,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:27:58,199 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:27:58,199 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:27:58,199 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:27:58,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:27:58,200 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:27:58,200 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:27:58,200 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:27:58,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:27:58,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:27:58,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:27:58,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:27:58,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:27:58,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:27:58,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:27:58,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:27:58,202 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:27:58,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:27:58,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:27:58,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:27:58,656 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:27:58,657 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:27:58,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekh_ctm.2-1.c [2022-10-15 17:27:58,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2782ea7ad/d0e099b073f24dada3033eb674f0d508/FLAGd8620eae7 [2022-10-15 17:27:59,787 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:27:59,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_ctm.2-1.c [2022-10-15 17:27:59,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2782ea7ad/d0e099b073f24dada3033eb674f0d508/FLAGd8620eae7 [2022-10-15 17:28:00,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2782ea7ad/d0e099b073f24dada3033eb674f0d508 [2022-10-15 17:28:00,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:28:00,284 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:28:00,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:28:00,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:28:00,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:28:00,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:28:00" (1/1) ... [2022-10-15 17:28:00,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@207437ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:00, skipping insertion in model container [2022-10-15 17:28:00,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:28:00" (1/1) ... [2022-10-15 17:28:00,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:28:00,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:28:00,693 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_ctm.2-1.c[1871,1884] [2022-10-15 17:28:01,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:28:01,638 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:28:01,658 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_ctm.2-1.c[1871,1884] [2022-10-15 17:28:01,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:28:02,016 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:28:02,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02 WrapperNode [2022-10-15 17:28:02,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:28:02,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:28:02,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:28:02,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:28:02,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:02,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:02,557 INFO L138 Inliner]: procedures = 99, calls = 2724, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 8254 [2022-10-15 17:28:02,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:28:02,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:28:02,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:28:02,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:28:02,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:02,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:02,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:02,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:03,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:03,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:03,135 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:03,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:03,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:28:03,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:28:03,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:28:03,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:28:03,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (1/1) ... [2022-10-15 17:28:03,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:28:03,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:28:03,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 17:28:03,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 17:28:03,368 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_W_state [2022-10-15 17:28:03,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_W_state [2022-10-15 17:28:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_T_state [2022-10-15 17:28:03,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_T_state [2022-10-15 17:28:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:28:03,370 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_need_to_run_nxtbg [2022-10-15 17:28:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_need_to_run_nxtbg [2022-10-15 17:28:03,370 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-10-15 17:28:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-10-15 17:28:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write___startrek_current_priority [2022-10-15 17:28:03,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write___startrek_current_priority [2022-10-15 17:28:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_input [2022-10-15 17:28:03,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_input [2022-10-15 17:28:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2022-10-15 17:28:03,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2022-10-15 17:28:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure bg_nxtcolorsensor [2022-10-15 17:28:03,372 INFO L138 BoogieDeclarations]: Found implementation of procedure bg_nxtcolorsensor [2022-10-15 17:28:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_Writer [2022-10-15 17:28:03,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_Writer [2022-10-15 17:28:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtcolorsensor_mode [2022-10-15 17:28:03,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtcolorsensor_mode [2022-10-15 17:28:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:28:03,373 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-10-15 17:28:03,373 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-10-15 17:28:03,373 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_R_count [2022-10-15 17:28:03,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_R_count [2022-10-15 17:28:03,373 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_T_state [2022-10-15 17:28:03,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_T_state [2022-10-15 17:28:03,374 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_output [2022-10-15 17:28:03,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_output [2022-10-15 17:28:03,374 INFO L130 BoogieDeclarations]: Found specification of procedure move_motor [2022-10-15 17:28:03,374 INFO L138 BoogieDeclarations]: Found implementation of procedure move_motor [2022-10-15 17:28:03,375 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_R_speed [2022-10-15 17:28:03,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_R_speed [2022-10-15 17:28:03,375 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-10-15 17:28:03,375 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-10-15 17:28:03,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:28:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-10-15 17:28:03,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-10-15 17:28:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_set_nxtcolorsensor [2022-10-15 17:28:03,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_set_nxtcolorsensor [2022-10-15 17:28:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t3 [2022-10-15 17:28:03,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t3 [2022-10-15 17:28:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_output [2022-10-15 17:28:03,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_output [2022-10-15 17:28:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-10-15 17:28:03,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-10-15 17:28:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_T_count [2022-10-15 17:28:03,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_T_count [2022-10-15 17:28:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-10-15 17:28:03,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-10-15 17:28:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure TerminateTask [2022-10-15 17:28:03,378 INFO L138 BoogieDeclarations]: Found implementation of procedure TerminateTask [2022-10-15 17:28:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_W_count [2022-10-15 17:28:03,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_W_count [2022-10-15 17:28:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read___startrek_current_priority [2022-10-15 17:28:03,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read___startrek_current_priority [2022-10-15 17:28:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_W_count [2022-10-15 17:28:03,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_W_count [2022-10-15 17:28:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_T_count [2022-10-15 17:28:03,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_T_count [2022-10-15 17:28:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_T_speed [2022-10-15 17:28:03,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_T_speed [2022-10-15 17:28:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtcolorsensor_data_mode [2022-10-15 17:28:03,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtcolorsensor_data_mode [2022-10-15 17:28:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_threshold [2022-10-15 17:28:03,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_threshold [2022-10-15 17:28:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_need_to_read [2022-10-15 17:28:03,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_need_to_read [2022-10-15 17:28:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_R_state [2022-10-15 17:28:03,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_R_state [2022-10-15 17:28:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_Reader [2022-10-15 17:28:03,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_Reader [2022-10-15 17:28:03,385 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_dir [2022-10-15 17:28:03,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_dir [2022-10-15 17:28:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_W_speed [2022-10-15 17:28:03,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_W_speed [2022-10-15 17:28:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_input [2022-10-15 17:28:03,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_input [2022-10-15 17:28:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_R_state [2022-10-15 17:28:03,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_R_state [2022-10-15 17:28:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_W_state [2022-10-15 17:28:03,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_W_state [2022-10-15 17:28:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_R_count [2022-10-15 17:28:03,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_R_count [2022-10-15 17:28:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_TapeMover [2022-10-15 17:28:03,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_TapeMover [2022-10-15 17:28:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_nxtcolorsensor_mode [2022-10-15 17:28:03,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_nxtcolorsensor_mode [2022-10-15 17:28:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:28:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_Controller [2022-10-15 17:28:03,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_Controller [2022-10-15 17:28:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:28:03,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:28:04,195 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:28:04,202 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:28:13,858 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:28:13,900 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:28:13,900 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-15 17:28:13,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:28:13 BoogieIcfgContainer [2022-10-15 17:28:13,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:28:13,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:28:13,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:28:13,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:28:13,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:28:00" (1/3) ... [2022-10-15 17:28:13,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385e0810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:28:13, skipping insertion in model container [2022-10-15 17:28:13,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:02" (2/3) ... [2022-10-15 17:28:13,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385e0810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:28:13, skipping insertion in model container [2022-10-15 17:28:13,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:28:13" (3/3) ... [2022-10-15 17:28:13,924 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_ctm.2-1.c [2022-10-15 17:28:13,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:28:13,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3990 error locations. [2022-10-15 17:28:14,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:28:14,141 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;@26250ce1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:28:14,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3990 error locations. [2022-10-15 17:28:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 8195 states, 3858 states have (on average 2.2962674961119753) internal successors, (8859), 7871 states have internal predecessors, (8859), 302 states have call successors, (302), 44 states have call predecessors, (302), 44 states have return successors, (302), 292 states have call predecessors, (302), 302 states have call successors, (302) [2022-10-15 17:28:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:28:14,202 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:14,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:28:14,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_cs_t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3987 more)] === [2022-10-15 17:28:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash 12354973, now seen corresponding path program 1 times [2022-10-15 17:28:14,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:14,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332324374] [2022-10-15 17:28:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:14,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:28:15,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:15,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332324374] [2022-10-15 17:28:15,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332324374] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:15,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:15,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:15,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359859912] [2022-10-15 17:28:15,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:15,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:15,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:15,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:15,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:15,163 INFO L87 Difference]: Start difference. First operand has 8195 states, 3858 states have (on average 2.2962674961119753) internal successors, (8859), 7871 states have internal predecessors, (8859), 302 states have call successors, (302), 44 states have call predecessors, (302), 44 states have return successors, (302), 292 states have call predecessors, (302), 302 states have call successors, (302) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:21,265 INFO L93 Difference]: Finished difference Result 8149 states and 8725 transitions. [2022-10-15 17:28:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:21,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-15 17:28:21,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:21,345 INFO L225 Difference]: With dead ends: 8149 [2022-10-15 17:28:21,346 INFO L226 Difference]: Without dead ends: 8143 [2022-10-15 17:28:21,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:21,354 INFO L413 NwaCegarLoop]: 4734 mSDtfsCounter, 8723 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3991 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8723 SdHoareTripleChecker+Valid, 4734 SdHoareTripleChecker+Invalid, 4032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:21,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8723 Valid, 4734 Invalid, 4032 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [41 Valid, 3991 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-10-15 17:28:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8143 states. [2022-10-15 17:28:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8143 to 8143. [2022-10-15 17:28:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8143 states, 3849 states have (on average 2.10833982852689) internal successors, (8115), 7819 states have internal predecessors, (8115), 302 states have call successors, (302), 44 states have call predecessors, (302), 44 states have return successors, (302), 292 states have call predecessors, (302), 302 states have call successors, (302) [2022-10-15 17:28:21,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8143 states to 8143 states and 8719 transitions. [2022-10-15 17:28:21,855 INFO L78 Accepts]: Start accepts. Automaton has 8143 states and 8719 transitions. Word has length 3 [2022-10-15 17:28:21,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:21,856 INFO L495 AbstractCegarLoop]: Abstraction has 8143 states and 8719 transitions. [2022-10-15 17:28:21,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 8143 states and 8719 transitions. [2022-10-15 17:28:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:28:21,860 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:21,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:28:21,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:28:21,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_cs_t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3987 more)] === [2022-10-15 17:28:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:21,862 INFO L85 PathProgramCache]: Analyzing trace with hash 12354974, now seen corresponding path program 1 times [2022-10-15 17:28:21,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:21,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936662458] [2022-10-15 17:28:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:21,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:28:22,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:22,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936662458] [2022-10-15 17:28:22,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936662458] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:22,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:22,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:22,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692565829] [2022-10-15 17:28:22,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:22,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:22,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:22,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:22,444 INFO L87 Difference]: Start difference. First operand 8143 states and 8719 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:29,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:29,494 INFO L93 Difference]: Finished difference Result 8103 states and 8679 transitions. [2022-10-15 17:28:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:29,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-15 17:28:29,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:29,556 INFO L225 Difference]: With dead ends: 8103 [2022-10-15 17:28:29,557 INFO L226 Difference]: Without dead ends: 8103 [2022-10-15 17:28:29,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:29,559 INFO L413 NwaCegarLoop]: 4731 mSDtfsCounter, 8677 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3948 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8677 SdHoareTripleChecker+Valid, 4731 SdHoareTripleChecker+Invalid, 3987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:29,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8677 Valid, 4731 Invalid, 3987 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 3948 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-10-15 17:28:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2022-10-15 17:28:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 8103. [2022-10-15 17:28:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8103 states, 3849 states have (on average 2.0979475188360612) internal successors, (8075), 7779 states have internal predecessors, (8075), 302 states have call successors, (302), 44 states have call predecessors, (302), 44 states have return successors, (302), 292 states have call predecessors, (302), 302 states have call successors, (302) [2022-10-15 17:28:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8103 states to 8103 states and 8679 transitions. [2022-10-15 17:28:29,960 INFO L78 Accepts]: Start accepts. Automaton has 8103 states and 8679 transitions. Word has length 3 [2022-10-15 17:28:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:29,962 INFO L495 AbstractCegarLoop]: Abstraction has 8103 states and 8679 transitions. [2022-10-15 17:28:29,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8103 states and 8679 transitions. [2022-10-15 17:28:29,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:28:29,965 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:29,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:28:29,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:28:29,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_cs_t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3987 more)] === [2022-10-15 17:28:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:29,967 INFO L85 PathProgramCache]: Analyzing trace with hash 383016551, now seen corresponding path program 1 times [2022-10-15 17:28:29,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:29,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423688844] [2022-10-15 17:28:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:29,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:28:30,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:30,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423688844] [2022-10-15 17:28:30,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423688844] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:30,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:30,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:30,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832417243] [2022-10-15 17:28:30,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:30,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:30,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:30,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:30,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:30,306 INFO L87 Difference]: Start difference. First operand 8103 states and 8679 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-10-15 17:28:36,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:36,474 INFO L93 Difference]: Finished difference Result 8061 states and 8637 transitions. [2022-10-15 17:28:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:36,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2022-10-15 17:28:36,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:36,518 INFO L225 Difference]: With dead ends: 8061 [2022-10-15 17:28:36,518 INFO L226 Difference]: Without dead ends: 8061 [2022-10-15 17:28:36,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:36,520 INFO L413 NwaCegarLoop]: 4689 mSDtfsCounter, 8634 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3948 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8634 SdHoareTripleChecker+Valid, 4689 SdHoareTripleChecker+Invalid, 3989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:36,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8634 Valid, 4689 Invalid, 3989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3948 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-10-15 17:28:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2022-10-15 17:28:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 8061. [2022-10-15 17:28:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8061 states, 3849 states have (on average 2.087035593660691) internal successors, (8033), 7737 states have internal predecessors, (8033), 302 states have call successors, (302), 44 states have call predecessors, (302), 44 states have return successors, (302), 292 states have call predecessors, (302), 302 states have call successors, (302) [2022-10-15 17:28:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8061 states to 8061 states and 8637 transitions. [2022-10-15 17:28:36,818 INFO L78 Accepts]: Start accepts. Automaton has 8061 states and 8637 transitions. Word has length 4 [2022-10-15 17:28:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:36,819 INFO L495 AbstractCegarLoop]: Abstraction has 8061 states and 8637 transitions. [2022-10-15 17:28:36,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-10-15 17:28:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 8061 states and 8637 transitions. [2022-10-15 17:28:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:28:36,820 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:36,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:28:36,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:28:36,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_cs_t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3987 more)] === [2022-10-15 17:28:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:36,821 INFO L85 PathProgramCache]: Analyzing trace with hash 383016552, now seen corresponding path program 1 times [2022-10-15 17:28:36,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:36,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397909968] [2022-10-15 17:28:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:36,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:28:37,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:37,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397909968] [2022-10-15 17:28:37,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397909968] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:37,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:37,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:37,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952791663] [2022-10-15 17:28:37,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:37,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:37,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:37,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:37,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:37,198 INFO L87 Difference]: Start difference. First operand 8061 states and 8637 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-10-15 17:28:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:46,763 INFO L93 Difference]: Finished difference Result 8021 states and 8597 transitions. [2022-10-15 17:28:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:46,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2022-10-15 17:28:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:46,807 INFO L225 Difference]: With dead ends: 8021 [2022-10-15 17:28:46,807 INFO L226 Difference]: Without dead ends: 8021 [2022-10-15 17:28:46,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:46,809 INFO L413 NwaCegarLoop]: 4689 mSDtfsCounter, 8594 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3908 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8594 SdHoareTripleChecker+Valid, 4689 SdHoareTripleChecker+Invalid, 3947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:46,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8594 Valid, 4689 Invalid, 3947 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 3908 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-10-15 17:28:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8021 states. [2022-10-15 17:28:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8021 to 8021. [2022-10-15 17:28:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8021 states, 3849 states have (on average 2.076643283969862) internal successors, (7993), 7697 states have internal predecessors, (7993), 302 states have call successors, (302), 44 states have call predecessors, (302), 44 states have return successors, (302), 292 states have call predecessors, (302), 302 states have call successors, (302) [2022-10-15 17:28:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8021 states to 8021 states and 8597 transitions. [2022-10-15 17:28:47,059 INFO L78 Accepts]: Start accepts. Automaton has 8021 states and 8597 transitions. Word has length 4 [2022-10-15 17:28:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:47,060 INFO L495 AbstractCegarLoop]: Abstraction has 8021 states and 8597 transitions. [2022-10-15 17:28:47,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-10-15 17:28:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 8021 states and 8597 transitions. [2022-10-15 17:28:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:28:47,061 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:47,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:28:47,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:28:47,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_cs_t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3987 more)] === [2022-10-15 17:28:47,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:47,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1011376416, now seen corresponding path program 1 times [2022-10-15 17:28:47,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:47,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229464762] [2022-10-15 17:28:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:47,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:28:47,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:47,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229464762] [2022-10-15 17:28:47,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229464762] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:47,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:47,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:47,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460066491] [2022-10-15 17:28:47,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:47,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:47,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:47,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:47,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:47,514 INFO L87 Difference]: Start difference. First operand 8021 states and 8597 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)