/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-b8ad66e [2020-10-23 18:26:06,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:26:06,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:26:06,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:26:06,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:26:06,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:26:06,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:26:06,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:26:06,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:26:06,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:26:06,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:26:06,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:26:06,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:26:06,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:26:06,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:26:06,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:26:06,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:26:06,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:26:06,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:26:06,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:26:06,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:26:06,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:26:06,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:26:06,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:26:06,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:26:06,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:26:06,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:26:06,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:26:06,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:26:06,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:26:06,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:26:06,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:26:06,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:26:06,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:26:06,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:26:06,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:26:06,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:26:06,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:26:06,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:26:06,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:26:06,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:26:06,845 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 [2020-10-23 18:26:06,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:26:06,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:26:06,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:26:06,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:26:06,907 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:26:06,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:26:06,908 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:26:06,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:26:06,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:26:06,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:26:06,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:26:06,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:26:06,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:26:06,909 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:26:06,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:26:06,910 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:26:06,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:26:06,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:26:06,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:26:06,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:26:06,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:26:06,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:26:06,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:26:06,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:26:06,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:26:06,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:26:06,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:26:06,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:26:06,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:26:06,914 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:26:07,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:26:07,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:26:07,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:26:07,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:26:07,389 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:26:07,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-10-23 18:26:07,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc077fc72/9f93d3ebd1af4475867f849a7f0f2093/FLAG423d1c809 [2020-10-23 18:26:08,211 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:26:08,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-10-23 18:26:08,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc077fc72/9f93d3ebd1af4475867f849a7f0f2093/FLAG423d1c809 [2020-10-23 18:26:08,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc077fc72/9f93d3ebd1af4475867f849a7f0f2093 [2020-10-23 18:26:08,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:26:08,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:26:08,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:26:08,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:26:08,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:26:08,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:08" (1/1) ... [2020-10-23 18:26:08,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8662e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08, skipping insertion in model container [2020-10-23 18:26:08,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:08" (1/1) ... [2020-10-23 18:26:08,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:26:08,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:26:08,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:26:08,905 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:26:08,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:26:08,948 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:26:08,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08 WrapperNode [2020-10-23 18:26:08,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:26:08,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:26:08,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:26:08,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:26:08,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08" (1/1) ... [2020-10-23 18:26:08,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08" (1/1) ... [2020-10-23 18:26:08,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08" (1/1) ... [2020-10-23 18:26:08,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08" (1/1) ... [2020-10-23 18:26:08,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08" (1/1) ... [2020-10-23 18:26:08,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08" (1/1) ... [2020-10-23 18:26:08,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08" (1/1) ... [2020-10-23 18:26:08,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:26:08,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:26:08,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:26:08,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:26:08,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08" (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 [2020-10-23 18:26:09,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:26:09,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:26:09,064 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:26:09,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-10-23 18:26:09,065 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-10-23 18:26:09,065 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-10-23 18:26:09,065 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2020-10-23 18:26:09,065 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2020-10-23 18:26:09,065 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2020-10-23 18:26:09,065 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2020-10-23 18:26:09,066 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2020-10-23 18:26:09,066 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2020-10-23 18:26:09,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:26:09,066 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:26:09,066 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:26:09,066 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:26:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:26:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-10-23 18:26:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:26:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-10-23 18:26:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-10-23 18:26:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2020-10-23 18:26:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2020-10-23 18:26:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2020-10-23 18:26:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2020-10-23 18:26:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2020-10-23 18:26:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2020-10-23 18:26:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:26:09,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:26:09,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:26:09,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:26:09,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:26:09,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:26:09,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:26:09,465 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:26:09,466 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:26:09,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:09 BoogieIcfgContainer [2020-10-23 18:26:09,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:26:09,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:26:09,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:26:09,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:26:09,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:26:08" (1/3) ... [2020-10-23 18:26:09,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ddcf251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:09, skipping insertion in model container [2020-10-23 18:26:09,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:08" (2/3) ... [2020-10-23 18:26:09,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ddcf251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:09, skipping insertion in model container [2020-10-23 18:26:09,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:09" (3/3) ... [2020-10-23 18:26:09,478 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-10-23 18:26:09,494 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:26:09,503 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:26:09,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:26:09,567 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:26:09,567 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:26:09,568 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:26:09,568 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:26:09,568 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:26:09,568 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:26:09,568 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:26:09,569 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:26:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2020-10-23 18:26:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:26:09,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:09,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:09,618 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash 329780527, now seen corresponding path program 1 times [2020-10-23 18:26:09,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:09,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093362582] [2020-10-23 18:26:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:10,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:10,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093362582] [2020-10-23 18:26:10,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:10,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:26:10,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745363766] [2020-10-23 18:26:10,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:26:10,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:10,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:26:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:26:10,110 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 4 states. [2020-10-23 18:26:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:10,429 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2020-10-23 18:26:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:26:10,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-23 18:26:10,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:10,444 INFO L225 Difference]: With dead ends: 145 [2020-10-23 18:26:10,454 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:26:10,458 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 [2020-10-23 18:26:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:26:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-23 18:26:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 18:26:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2020-10-23 18:26:10,522 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 17 [2020-10-23 18:26:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:10,523 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2020-10-23 18:26:10,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:26:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2020-10-23 18:26:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:26:10,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:10,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:10,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:26:10,525 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:10,527 INFO L82 PathProgramCache]: Analyzing trace with hash -208282628, now seen corresponding path program 1 times [2020-10-23 18:26:10,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:10,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421948240] [2020-10-23 18:26:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:10,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:10,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:10,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421948240] [2020-10-23 18:26:10,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:10,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:26:10,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445920603] [2020-10-23 18:26:10,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:26:10,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:10,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:26:10,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:26:10,704 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 5 states. [2020-10-23 18:26:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:11,058 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2020-10-23 18:26:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:26:11,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-23 18:26:11,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:11,061 INFO L225 Difference]: With dead ends: 114 [2020-10-23 18:26:11,062 INFO L226 Difference]: Without dead ends: 107 [2020-10-23 18:26:11,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:26:11,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-23 18:26:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2020-10-23 18:26:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-23 18:26:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2020-10-23 18:26:11,098 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 18 [2020-10-23 18:26:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:11,098 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2020-10-23 18:26:11,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:26:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2020-10-23 18:26:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:26:11,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:11,100 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] [2020-10-23 18:26:11,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:26:11,101 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:11,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2070923982, now seen corresponding path program 1 times [2020-10-23 18:26:11,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:11,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626282336] [2020-10-23 18:26:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:11,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:11,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:11,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 18:26:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:11,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626282336] [2020-10-23 18:26:11,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:11,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:26:11,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589396695] [2020-10-23 18:26:11,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:26:11,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:11,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:26:11,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:26:11,241 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand 6 states. [2020-10-23 18:26:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:11,553 INFO L93 Difference]: Finished difference Result 255 states and 358 transitions. [2020-10-23 18:26:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:26:11,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-23 18:26:11,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:11,557 INFO L225 Difference]: With dead ends: 255 [2020-10-23 18:26:11,557 INFO L226 Difference]: Without dead ends: 163 [2020-10-23 18:26:11,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:26:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-23 18:26:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-10-23 18:26:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-23 18:26:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 168 transitions. [2020-10-23 18:26:11,583 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 168 transitions. Word has length 30 [2020-10-23 18:26:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:11,583 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 168 transitions. [2020-10-23 18:26:11,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:26:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 168 transitions. [2020-10-23 18:26:11,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 18:26:11,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:11,585 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] [2020-10-23 18:26:11,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:26:11,586 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:11,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1366222686, now seen corresponding path program 1 times [2020-10-23 18:26:11,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:11,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245773638] [2020-10-23 18:26:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:11,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:11,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:11,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 18:26:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:11,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-23 18:26:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:11,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245773638] [2020-10-23 18:26:11,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600044486] [2020-10-23 18:26:11,720 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 [2020-10-23 18:26:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:11,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:26:11,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:26:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:11,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:26:11,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2020-10-23 18:26:11,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742808375] [2020-10-23 18:26:11,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:26:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:26:11,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:26:11,890 INFO L87 Difference]: Start difference. First operand 127 states and 168 transitions. Second operand 8 states. [2020-10-23 18:26:12,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:12,271 INFO L93 Difference]: Finished difference Result 353 states and 511 transitions. [2020-10-23 18:26:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:26:12,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-23 18:26:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:12,275 INFO L225 Difference]: With dead ends: 353 [2020-10-23 18:26:12,275 INFO L226 Difference]: Without dead ends: 237 [2020-10-23 18:26:12,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:26:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-23 18:26:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 175. [2020-10-23 18:26:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-23 18:26:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 244 transitions. [2020-10-23 18:26:12,300 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 244 transitions. Word has length 41 [2020-10-23 18:26:12,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:12,301 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 244 transitions. [2020-10-23 18:26:12,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:26:12,301 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 244 transitions. [2020-10-23 18:26:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 18:26:12,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:12,304 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] [2020-10-23 18:26:12,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:12,518 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1973624570, now seen corresponding path program 1 times [2020-10-23 18:26:12,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:12,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091022525] [2020-10-23 18:26:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 18:26:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 18:26:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 18:26:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-23 18:26:12,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091022525] [2020-10-23 18:26:12,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:12,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:26:12,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033728301] [2020-10-23 18:26:12,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:26:12,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:12,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:26:12,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:26:12,683 INFO L87 Difference]: Start difference. First operand 175 states and 244 transitions. Second operand 7 states. [2020-10-23 18:26:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:13,090 INFO L93 Difference]: Finished difference Result 544 states and 812 transitions. [2020-10-23 18:26:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:26:13,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-23 18:26:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:13,099 INFO L225 Difference]: With dead ends: 544 [2020-10-23 18:26:13,100 INFO L226 Difference]: Without dead ends: 380 [2020-10-23 18:26:13,104 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 [2020-10-23 18:26:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-23 18:26:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 223. [2020-10-23 18:26:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-23 18:26:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 324 transitions. [2020-10-23 18:26:13,134 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 324 transitions. Word has length 52 [2020-10-23 18:26:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:13,134 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 324 transitions. [2020-10-23 18:26:13,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:26:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 324 transitions. [2020-10-23 18:26:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 18:26:13,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:13,137 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] [2020-10-23 18:26:13,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:26:13,138 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1020467060, now seen corresponding path program 1 times [2020-10-23 18:26:13,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:13,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855206777] [2020-10-23 18:26:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 18:26:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 18:26:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 18:26:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 18:26:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-23 18:26:13,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855206777] [2020-10-23 18:26:13,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:13,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:26:13,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240367622] [2020-10-23 18:26:13,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:26:13,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:13,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:26:13,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:26:13,310 INFO L87 Difference]: Start difference. First operand 223 states and 324 transitions. Second operand 6 states. [2020-10-23 18:26:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:13,782 INFO L93 Difference]: Finished difference Result 834 states and 1269 transitions. [2020-10-23 18:26:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:26:13,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-23 18:26:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:13,788 INFO L225 Difference]: With dead ends: 834 [2020-10-23 18:26:13,788 INFO L226 Difference]: Without dead ends: 622 [2020-10-23 18:26:13,789 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 [2020-10-23 18:26:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-10-23 18:26:13,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 388. [2020-10-23 18:26:13,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-23 18:26:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 574 transitions. [2020-10-23 18:26:13,834 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 574 transitions. Word has length 64 [2020-10-23 18:26:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:13,835 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 574 transitions. [2020-10-23 18:26:13,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:26:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 574 transitions. [2020-10-23 18:26:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 18:26:13,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:13,842 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] [2020-10-23 18:26:13,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:26:13,842 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash -111684769, now seen corresponding path program 1 times [2020-10-23 18:26:13,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:13,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428870401] [2020-10-23 18:26:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 18:26:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 18:26:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 18:26:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 18:26:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-23 18:26:13,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428870401] [2020-10-23 18:26:13,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:13,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:26:13,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003983668] [2020-10-23 18:26:13,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:26:13,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:26:13,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:26:13,988 INFO L87 Difference]: Start difference. First operand 388 states and 574 transitions. Second operand 6 states. [2020-10-23 18:26:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:14,440 INFO L93 Difference]: Finished difference Result 922 states and 1381 transitions. [2020-10-23 18:26:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:26:14,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-23 18:26:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:14,446 INFO L225 Difference]: With dead ends: 922 [2020-10-23 18:26:14,446 INFO L226 Difference]: Without dead ends: 545 [2020-10-23 18:26:14,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:26:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-10-23 18:26:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 388. [2020-10-23 18:26:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-23 18:26:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 568 transitions. [2020-10-23 18:26:14,483 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 568 transitions. Word has length 64 [2020-10-23 18:26:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:14,484 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 568 transitions. [2020-10-23 18:26:14,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:26:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 568 transitions. [2020-10-23 18:26:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 18:26:14,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:14,488 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] [2020-10-23 18:26:14,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:26:14,488 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:14,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2082624226, now seen corresponding path program 1 times [2020-10-23 18:26:14,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:14,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119355945] [2020-10-23 18:26:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:26:14,508 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:26:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:26:14,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:26:14,554 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:26:14,554 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:26:14,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:26:14,594 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 [2020-10-23 18:26:14,595 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 [2020-10-23 18:26:14,597 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 [2020-10-23 18:26:14,598 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 [2020-10-23 18:26:14,598 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 [2020-10-23 18:26:14,599 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 [2020-10-23 18:26:14,600 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 [2020-10-23 18:26:14,601 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 [2020-10-23 18:26:14,602 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 [2020-10-23 18:26:14,602 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 [2020-10-23 18:26:14,603 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 [2020-10-23 18:26:14,604 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 [2020-10-23 18:26:14,605 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 [2020-10-23 18:26:14,605 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 [2020-10-23 18:26:14,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:26:14 BoogieIcfgContainer [2020-10-23 18:26:14,621 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:26:14,623 INFO L168 Benchmark]: Toolchain (without parser) took 6019.15 ms. Allocated memory was 125.8 MB in the beginning and 184.5 MB in the end (delta: 58.7 MB). Free memory was 100.7 MB in the beginning and 62.8 MB in the end (delta: 37.9 MB). Peak memory consumption was 97.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:14,624 INFO L168 Benchmark]: CDTParser took 1.41 ms. Allocated memory is still 125.8 MB. Free memory is still 86.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:26:14,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.28 ms. Allocated memory is still 125.8 MB. Free memory was 100.2 MB in the beginning and 90.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:14,625 INFO L168 Benchmark]: Boogie Preprocessor took 41.50 ms. Allocated memory is still 125.8 MB. Free memory was 90.2 MB in the beginning and 88.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:14,626 INFO L168 Benchmark]: RCFGBuilder took 476.18 ms. Allocated memory was 125.8 MB in the beginning and 153.1 MB in the end (delta: 27.3 MB). Free memory was 88.5 MB in the beginning and 131.5 MB in the end (delta: -43.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:14,627 INFO L168 Benchmark]: TraceAbstraction took 5150.78 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 131.0 MB in the beginning and 62.8 MB in the end (delta: 68.1 MB). Peak memory consumption was 99.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:14,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.41 ms. Allocated memory is still 125.8 MB. Free memory is still 86.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 337.28 ms. Allocated memory is still 125.8 MB. Free memory was 100.2 MB in the beginning and 90.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.50 ms. Allocated memory is still 125.8 MB. Free memory was 90.2 MB in the beginning and 88.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 476.18 ms. Allocated memory was 125.8 MB in the beginning and 153.1 MB in the end (delta: 27.3 MB). Free memory was 88.5 MB in the beginning and 131.5 MB in the end (delta: -43.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5150.78 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 131.0 MB in the beginning and 62.8 MB in the end (delta: 68.1 MB). Peak memory consumption was 99.6 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: 4.9s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 2.7s, 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, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s 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, 0.9s 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...