/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/stateful_check.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:28:21,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:28:21,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:28:21,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:28:21,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:28:21,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:28:21,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:28:21,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:28:21,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:28:21,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:28:21,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:28:21,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:28:21,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:28:21,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:28:21,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:28:21,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:28:21,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:28:21,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:28:21,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:28:21,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:28:21,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:28:21,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:28:21,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:28:21,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:28:21,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:28:21,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:28:21,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:28:21,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:28:21,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:28:21,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:28:21,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:28:21,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:28:21,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:28:21,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:28:21,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:28:21,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:28:21,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:28:21,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:28:21,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:28:21,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:28:21,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:28:21,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:28:21,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:28:21,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:28:21,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:28:21,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:28:21,932 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:28:21,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:28:21,932 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:28:21,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:28:21,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:28:21,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:28:21,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:28:21,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:28:21,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:28:21,934 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:28:21,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:28:21,935 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:28:21,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:28:21,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:28:21,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:28:21,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:28:21,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:28:21,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:28:21,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:28:21,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:28:21,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:28:21,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:28:21,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:28:21,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:28:21,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:28:21,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:28:22,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:28:22,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:28:22,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:28:22,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:28:22,386 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:28:22,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-11-06 22:28:22,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c6e4ba13/54b69fbfe977424a9f82cf1e9e4058f8/FLAGbb743c702 [2020-11-06 22:28:23,009 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:28:23,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-11-06 22:28:23,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c6e4ba13/54b69fbfe977424a9f82cf1e9e4058f8/FLAGbb743c702 [2020-11-06 22:28:23,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c6e4ba13/54b69fbfe977424a9f82cf1e9e4058f8 [2020-11-06 22:28:23,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:28:23,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:28:23,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:28:23,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:28:23,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:28:23,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:23" (1/1) ... [2020-11-06 22:28:23,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f03d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23, skipping insertion in model container [2020-11-06 22:28:23,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:23" (1/1) ... [2020-11-06 22:28:23,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:28:23,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:28:23,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:28:23,599 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:28:23,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:28:23,639 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:28:23,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23 WrapperNode [2020-11-06 22:28:23,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:28:23,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:28:23,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:28:23,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:28:23,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23" (1/1) ... [2020-11-06 22:28:23,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23" (1/1) ... [2020-11-06 22:28:23,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23" (1/1) ... [2020-11-06 22:28:23,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23" (1/1) ... [2020-11-06 22:28:23,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23" (1/1) ... [2020-11-06 22:28:23,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23" (1/1) ... [2020-11-06 22:28:23,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23" (1/1) ... [2020-11-06 22:28:23,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:28:23,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:28:23,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:28:23,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:28:23,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:28:23,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:28:23,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:28:23,761 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:28:23,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-11-06 22:28:23,762 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-11-06 22:28:23,762 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-11-06 22:28:23,762 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2020-11-06 22:28:23,763 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2020-11-06 22:28:23,763 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2020-11-06 22:28:23,763 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2020-11-06 22:28:23,763 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2020-11-06 22:28:23,764 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2020-11-06 22:28:23,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:28:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:28:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:28:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:28:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:28:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-11-06 22:28:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:28:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-11-06 22:28:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-11-06 22:28:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2020-11-06 22:28:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2020-11-06 22:28:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2020-11-06 22:28:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2020-11-06 22:28:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2020-11-06 22:28:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2020-11-06 22:28:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:28:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:28:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:28:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:28:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:28:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:28:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:28:24,266 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:28:24,266 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:28:24,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:24 BoogieIcfgContainer [2020-11-06 22:28:24,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:28:24,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:28:24,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:28:24,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:28:24,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:28:23" (1/3) ... [2020-11-06 22:28:24,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5901fb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:24, skipping insertion in model container [2020-11-06 22:28:24,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23" (2/3) ... [2020-11-06 22:28:24,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5901fb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:24, skipping insertion in model container [2020-11-06 22:28:24,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:24" (3/3) ... [2020-11-06 22:28:24,282 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-11-06 22:28:24,297 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:28:24,301 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:28:24,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:28:24,355 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:28:24,355 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:28:24,355 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:28:24,356 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:28:24,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:28:24,356 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:28:24,356 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:28:24,356 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:28:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2020-11-06 22:28:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:28:24,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:24,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:28:24,385 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:24,391 INFO L82 PathProgramCache]: Analyzing trace with hash 329780527, now seen corresponding path program 1 times [2020-11-06 22:28:24,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:24,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441836005] [2020-11-06 22:28:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:24,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:24,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:28:24,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441836005] [2020-11-06 22:28:24,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:28:24,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:28:24,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804768758] [2020-11-06 22:28:24,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:28:24,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:24,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:28:24,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:28:24,712 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 4 states. [2020-11-06 22:28:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:25,086 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2020-11-06 22:28:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:28:25,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-06 22:28:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:25,100 INFO L225 Difference]: With dead ends: 145 [2020-11-06 22:28:25,100 INFO L226 Difference]: Without dead ends: 71 [2020-11-06 22:28:25,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:28:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-06 22:28:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-11-06 22:28:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-06 22:28:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2020-11-06 22:28:25,169 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 17 [2020-11-06 22:28:25,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:25,170 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2020-11-06 22:28:25,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:28:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2020-11-06 22:28:25,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:28:25,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:25,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:28:25,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:28:25,172 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:25,174 INFO L82 PathProgramCache]: Analyzing trace with hash -208282628, now seen corresponding path program 1 times [2020-11-06 22:28:25,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:25,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363494981] [2020-11-06 22:28:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:25,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:25,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:28:25,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363494981] [2020-11-06 22:28:25,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:28:25,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:28:25,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991890294] [2020-11-06 22:28:25,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:28:25,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:25,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:28:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:28:25,408 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 5 states. [2020-11-06 22:28:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:26,043 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2020-11-06 22:28:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:28:26,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-06 22:28:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:26,047 INFO L225 Difference]: With dead ends: 114 [2020-11-06 22:28:26,047 INFO L226 Difference]: Without dead ends: 107 [2020-11-06 22:28:26,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:28:26,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-06 22:28:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2020-11-06 22:28:26,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-06 22:28:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2020-11-06 22:28:26,089 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 18 [2020-11-06 22:28:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:26,090 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2020-11-06 22:28:26,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:28:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2020-11-06 22:28:26,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-06 22:28:26,093 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:26,094 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1] [2020-11-06 22:28:26,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:28:26,094 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:26,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:26,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2070923982, now seen corresponding path program 1 times [2020-11-06 22:28:26,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:26,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732217013] [2020-11-06 22:28:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:26,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:26,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:26,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 22:28:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:28:26,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732217013] [2020-11-06 22:28:26,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:28:26,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:28:26,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688842924] [2020-11-06 22:28:26,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:28:26,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:26,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:28:26,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:28:26,269 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand 6 states. [2020-11-06 22:28:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:26,593 INFO L93 Difference]: Finished difference Result 255 states and 358 transitions. [2020-11-06 22:28:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:28:26,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-11-06 22:28:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:26,598 INFO L225 Difference]: With dead ends: 255 [2020-11-06 22:28:26,598 INFO L226 Difference]: Without dead ends: 163 [2020-11-06 22:28:26,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:28:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-06 22:28:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-11-06 22:28:26,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-06 22:28:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 168 transitions. [2020-11-06 22:28:26,626 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 168 transitions. Word has length 30 [2020-11-06 22:28:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:26,626 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 168 transitions. [2020-11-06 22:28:26,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:28:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 168 transitions. [2020-11-06 22:28:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-06 22:28:26,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:26,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:28:26,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:28:26,629 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1366222686, now seen corresponding path program 1 times [2020-11-06 22:28:26,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:26,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012768388] [2020-11-06 22:28:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:26,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:26,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:26,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-06 22:28:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:26,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-06 22:28:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:28:26,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012768388] [2020-11-06 22:28:26,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102382767] [2020-11-06 22:28:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:28:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:26,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:28:26,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:28:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:28:27,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:28:27,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2020-11-06 22:28:27,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627045992] [2020-11-06 22:28:27,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:28:27,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:28:27,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:28:27,117 INFO L87 Difference]: Start difference. First operand 127 states and 168 transitions. Second operand 8 states. [2020-11-06 22:28:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:27,590 INFO L93 Difference]: Finished difference Result 353 states and 511 transitions. [2020-11-06 22:28:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:28:27,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-11-06 22:28:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:27,597 INFO L225 Difference]: With dead ends: 353 [2020-11-06 22:28:27,597 INFO L226 Difference]: Without dead ends: 237 [2020-11-06 22:28:27,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:28:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-11-06 22:28:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 175. [2020-11-06 22:28:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-11-06 22:28:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 244 transitions. [2020-11-06 22:28:27,659 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 244 transitions. Word has length 41 [2020-11-06 22:28:27,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:27,661 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 244 transitions. [2020-11-06 22:28:27,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:28:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 244 transitions. [2020-11-06 22:28:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-06 22:28:27,663 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:27,664 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:28:27,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:28:27,881 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:27,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1973624570, now seen corresponding path program 1 times [2020-11-06 22:28:27,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:27,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391829558] [2020-11-06 22:28:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:27,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:27,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:27,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-06 22:28:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:27,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 22:28:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-06 22:28:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-06 22:28:28,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391829558] [2020-11-06 22:28:28,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:28:28,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:28:28,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444909583] [2020-11-06 22:28:28,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:28:28,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:28,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:28:28,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:28:28,012 INFO L87 Difference]: Start difference. First operand 175 states and 244 transitions. Second operand 7 states. [2020-11-06 22:28:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:28,458 INFO L93 Difference]: Finished difference Result 544 states and 812 transitions. [2020-11-06 22:28:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:28:28,459 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-11-06 22:28:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:28,462 INFO L225 Difference]: With dead ends: 544 [2020-11-06 22:28:28,463 INFO L226 Difference]: Without dead ends: 380 [2020-11-06 22:28:28,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:28:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-11-06 22:28:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 223. [2020-11-06 22:28:28,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-11-06 22:28:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 324 transitions. [2020-11-06 22:28:28,491 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 324 transitions. Word has length 52 [2020-11-06 22:28:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:28,492 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 324 transitions. [2020-11-06 22:28:28,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:28:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 324 transitions. [2020-11-06 22:28:28,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-06 22:28:28,494 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:28,495 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:28:28,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:28:28,495 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:28,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1020467060, now seen corresponding path program 1 times [2020-11-06 22:28:28,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:28,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959680198] [2020-11-06 22:28:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-06 22:28:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 22:28:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-06 22:28:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-11-06 22:28:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-06 22:28:28,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959680198] [2020-11-06 22:28:28,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:28:28,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:28:28,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315003509] [2020-11-06 22:28:28,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:28:28,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:28,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:28:28,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:28:28,665 INFO L87 Difference]: Start difference. First operand 223 states and 324 transitions. Second operand 6 states. [2020-11-06 22:28:29,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:29,216 INFO L93 Difference]: Finished difference Result 834 states and 1269 transitions. [2020-11-06 22:28:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:28:29,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-11-06 22:28:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:29,223 INFO L225 Difference]: With dead ends: 834 [2020-11-06 22:28:29,223 INFO L226 Difference]: Without dead ends: 622 [2020-11-06 22:28:29,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:28:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-11-06 22:28:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 388. [2020-11-06 22:28:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-11-06 22:28:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 574 transitions. [2020-11-06 22:28:29,266 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 574 transitions. Word has length 64 [2020-11-06 22:28:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:29,266 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 574 transitions. [2020-11-06 22:28:29,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:28:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 574 transitions. [2020-11-06 22:28:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-06 22:28:29,269 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:29,269 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:28:29,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:28:29,270 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:29,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:29,270 INFO L82 PathProgramCache]: Analyzing trace with hash -111684769, now seen corresponding path program 1 times [2020-11-06 22:28:29,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:29,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488036612] [2020-11-06 22:28:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:29,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:29,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:29,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-06 22:28:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:29,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 22:28:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:29,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-06 22:28:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:29,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-11-06 22:28:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-06 22:28:29,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488036612] [2020-11-06 22:28:29,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:28:29,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:28:29,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890246802] [2020-11-06 22:28:29,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:28:29,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:28:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:28:29,422 INFO L87 Difference]: Start difference. First operand 388 states and 574 transitions. Second operand 6 states. [2020-11-06 22:28:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:29,847 INFO L93 Difference]: Finished difference Result 922 states and 1381 transitions. [2020-11-06 22:28:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:28:29,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-11-06 22:28:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:29,854 INFO L225 Difference]: With dead ends: 922 [2020-11-06 22:28:29,854 INFO L226 Difference]: Without dead ends: 545 [2020-11-06 22:28:29,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:28:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-11-06 22:28:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 388. [2020-11-06 22:28:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-11-06 22:28:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 568 transitions. [2020-11-06 22:28:29,892 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 568 transitions. Word has length 64 [2020-11-06 22:28:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:29,894 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 568 transitions. [2020-11-06 22:28:29,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:28:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 568 transitions. [2020-11-06 22:28:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-06 22:28:29,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:29,897 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:28:29,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 22:28:29,897 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:29,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:29,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2082624226, now seen corresponding path program 1 times [2020-11-06 22:28:29,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:29,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036011321] [2020-11-06 22:28:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:28:29,954 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:28:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:28:29,984 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:28:30,020 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:28:30,020 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:28:30,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 22:28:30,079 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,081 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,082 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,083 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,083 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,084 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,085 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,086 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,086 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,087 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,088 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,089 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,089 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,090 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-11-06 22:28:30,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:28:30 BoogieIcfgContainer [2020-11-06 22:28:30,104 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:28:30,106 INFO L168 Benchmark]: Toolchain (without parser) took 6722.50 ms. Allocated memory was 167.8 MB in the beginning and 257.9 MB in the end (delta: 90.2 MB). Free memory was 142.3 MB in the beginning and 228.1 MB in the end (delta: -85.8 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:30,107 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 167.8 MB. Free memory is still 140.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:28:30,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.22 ms. Allocated memory is still 167.8 MB. Free memory was 141.6 MB in the beginning and 131.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:30,109 INFO L168 Benchmark]: Boogie Preprocessor took 39.52 ms. Allocated memory is still 167.8 MB. Free memory was 131.5 MB in the beginning and 130.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:30,109 INFO L168 Benchmark]: RCFGBuilder took 587.12 ms. Allocated memory is still 167.8 MB. Free memory was 129.9 MB in the beginning and 144.9 MB in the end (delta: -15.0 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:30,110 INFO L168 Benchmark]: TraceAbstraction took 5831.90 ms. Allocated memory was 167.8 MB in the beginning and 257.9 MB in the end (delta: 90.2 MB). Free memory was 144.4 MB in the beginning and 228.1 MB in the end (delta: -83.7 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:30,114 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 167.8 MB. Free memory is still 140.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 248.22 ms. Allocated memory is still 167.8 MB. Free memory was 141.6 MB in the beginning and 131.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.52 ms. Allocated memory is still 167.8 MB. Free memory was 131.5 MB in the beginning and 130.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 587.12 ms. Allocated memory is still 167.8 MB. Free memory was 129.9 MB in the beginning and 144.9 MB in the end (delta: -15.0 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5831.90 ms. Allocated memory was 167.8 MB in the beginning and 257.9 MB in the end (delta: 90.2 MB). Free memory was 144.4 MB in the beginning and 228.1 MB in the end (delta: -83.7 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch11 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] int ldv_mutex = 1; [L13] int open_called = 0; VAL [\old(ldv_mutex)=55, \old(open_called)=51, ldv_mutex=1, open_called=0] [L76] int ldv_s_misc_fops_file_operations = 0; VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, open_called=0] [L77] CALL my_init() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L71] open_called = 0 [L72] return 0; VAL [\old(ldv_mutex)=1, \old(open_called)=0, \result=0, ldv_mutex=1, open_called=0] [L77] RET my_init() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, my_init()=0, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, open_called=0] [L83] COND TRUE ldv_s_misc_fops_file_operations==0 VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, open_called=0] [L84] CALL misc_open() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L59] COND TRUE __VERIFIER_nondet_int() [L61] return 1; VAL [\old(ldv_mutex)=1, \old(open_called)=0, \result=1, ldv_mutex=1, open_called=0] [L84] RET misc_open() VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, misc_open()=1, open_called=0] [L85] ldv_s_misc_fops_file_operations++ VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, open_called=0] [L91] COND TRUE ldv_s_misc_fops_file_operations==1 VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, open_called=0] [L92] CALL misc_read() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L54] return 0; VAL [\old(ldv_mutex)=1, \old(open_called)=0, \result=0, ldv_mutex=1, open_called=0] [L92] RET misc_read() VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, misc_read()=0, open_called=0] [L93] ldv_s_misc_fops_file_operations++ VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, open_called=0] [L99] COND TRUE ldv_s_misc_fops_file_operations==2 VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, open_called=0] [L100] CALL misc_llseek() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L50] return 0; VAL [\old(ldv_mutex)=1, \old(open_called)=0, \result=0, ldv_mutex=1, open_called=0] [L100] RET misc_llseek() VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, misc_llseek()=0, open_called=0] [L101] ldv_s_misc_fops_file_operations++ VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L106] case 3: VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=3, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, open_called=0] [L107] COND TRUE ldv_s_misc_fops_file_operations==3 VAL [\old(ldv_mutex)=1, \old(open_called)=0, __VERIFIER_nondet_int()=3, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, open_called=0] [L108] CALL misc_release() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L36] COND FALSE !(\read(open_called)) VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L43] CALL mutex_lock() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=1, open_called=0] [L19] ldv_mutex = 2 VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=2, open_called=0] [L43] RET mutex_lock() VAL [\old(ldv_mutex)=1, \old(open_called)=0, ldv_mutex=2, open_called=0] [L44] CALL mutex_lock() VAL [\old(ldv_mutex)=2, \old(open_called)=0, ldv_mutex=2, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [\old(ldv_mutex)=2, \old(open_called)=0, ldv_mutex=2, open_called=0] [L18] CALL __blast_assert() VAL [\old(ldv_mutex)=2, \old(open_called)=0, ldv_mutex=2, open_called=0] [L6] CALL reach_error() VAL [\old(ldv_mutex)=2, \old(open_called)=0, ldv_mutex=2, open_called=0] [L3] __assert_fail("0", "stateful_check.c", 3, "reach_error") VAL [\old(ldv_mutex)=2, \old(open_called)=0, ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 78 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.6s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 536 SDtfs, 788 SDslu, 836 SDs, 0 SdLazy, 1173 SolverSat, 347 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=388occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 655 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 391 NumberOfCodeBlocks, 391 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 319 ConstructedInterpolants, 0 QuantifiedInterpolants, 39789 SizeOfPredicates, 1 NumberOfNonLiveVariables, 183 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 62/68 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...