/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:15:38,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:15:38,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:15:38,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 05:15:38,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 05:15:38,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 05:15:38,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 05:15:38,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 05:15:38,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 05:15:38,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 05:15:38,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 05:15:38,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 05:15:38,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:15:38,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:15:38,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:15:38,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:15:38,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:15:38,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:15:38,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:15:38,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:15:38,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:15:38,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:15:38,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:15:38,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:15:38,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 05:15:38,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:15:38,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:15:38,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:15:38,884 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:15:38,908 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:15:38,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:15:38,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:15:38,915 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:15:38,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:15:38,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:15:38,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:15:38,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:15:38,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:15:38,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:15:38,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:15:38,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:15:38,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:15:38,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:15:38,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:15:38,919 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:15:38,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:15:38,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:15:38,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:15:38,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:15:38,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:15:38,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:15:38,921 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:15:39,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:15:39,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:15:39,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:15:39,378 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:15:39,379 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:15:39,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-11-07 05:15:39,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522d0f4d1/bf72d6f27c5b4551abc86bbfaecd661b/FLAGf4ea8b173 [2020-11-07 05:15:40,118 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:15:40,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-11-07 05:15:40,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522d0f4d1/bf72d6f27c5b4551abc86bbfaecd661b/FLAGf4ea8b173 [2020-11-07 05:15:40,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522d0f4d1/bf72d6f27c5b4551abc86bbfaecd661b [2020-11-07 05:15:40,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:15:40,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:15:40,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:15:40,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:15:40,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:15:40,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:15:40" (1/1) ... [2020-11-07 05:15:40,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f0d76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40, skipping insertion in model container [2020-11-07 05:15:40,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:15:40" (1/1) ... [2020-11-07 05:15:40,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:15:40,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:15:40,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:15:40,780 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:15:40,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:15:40,835 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:15:40,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40 WrapperNode [2020-11-07 05:15:40,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:15:40,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:15:40,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:15:40,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:15:40,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40" (1/1) ... [2020-11-07 05:15:40,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40" (1/1) ... [2020-11-07 05:15:40,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40" (1/1) ... [2020-11-07 05:15:40,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40" (1/1) ... [2020-11-07 05:15:40,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40" (1/1) ... [2020-11-07 05:15:40,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40" (1/1) ... [2020-11-07 05:15:40,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40" (1/1) ... [2020-11-07 05:15:40,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:15:40,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:15:40,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:15:40,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:15:40,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40" (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 [2020-11-07 05:15:41,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:15:41,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:15:41,011 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:15:41,011 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-11-07 05:15:41,011 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-11-07 05:15:41,012 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-11-07 05:15:41,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:15:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:15:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:15:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:15:41,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:15:41,014 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-11-07 05:15:41,014 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-11-07 05:15:41,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:15:41,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:15:41,016 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-11-07 05:15:41,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:15:41,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:15:41,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:15:41,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:15:41,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:15:41,506 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:15:41,507 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 05:15:41,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:15:41 BoogieIcfgContainer [2020-11-07 05:15:41,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:15:41,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:15:41,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:15:41,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:15:41,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:15:40" (1/3) ... [2020-11-07 05:15:41,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12300f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:15:41, skipping insertion in model container [2020-11-07 05:15:41,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:15:40" (2/3) ... [2020-11-07 05:15:41,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12300f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:15:41, skipping insertion in model container [2020-11-07 05:15:41,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:15:41" (3/3) ... [2020-11-07 05:15:41,536 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2020-11-07 05:15:41,554 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:15:41,558 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:15:41,570 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:15:41,593 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:15:41,593 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:15:41,593 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:15:41,593 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:15:41,594 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:15:41,594 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:15:41,594 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:15:41,594 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:15:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-11-07 05:15:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-07 05:15:41,619 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:41,620 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] [2020-11-07 05:15:41,620 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:41,628 INFO L82 PathProgramCache]: Analyzing trace with hash -512414827, now seen corresponding path program 1 times [2020-11-07 05:15:41,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:41,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835508924] [2020-11-07 05:15:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:42,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:15:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:15:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:15:42,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835508924] [2020-11-07 05:15:42,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:15:42,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 05:15:42,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158263528] [2020-11-07 05:15:42,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 05:15:42,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:15:42,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 05:15:42,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 05:15:42,131 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 7 states. [2020-11-07 05:15:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:15:42,499 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-11-07 05:15:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 05:15:42,502 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-07 05:15:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:15:42,513 INFO L225 Difference]: With dead ends: 63 [2020-11-07 05:15:42,513 INFO L226 Difference]: Without dead ends: 31 [2020-11-07 05:15:42,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-07 05:15:42,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-07 05:15:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-07 05:15:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-07 05:15:42,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 30 transitions. [2020-11-07 05:15:42,622 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 30 transitions. Word has length 22 [2020-11-07 05:15:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:15:42,623 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 30 transitions. [2020-11-07 05:15:42,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 05:15:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 30 transitions. [2020-11-07 05:15:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 05:15:42,626 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:15:42,627 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] [2020-11-07 05:15:42,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:15:42,627 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:15:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:15:42,630 INFO L82 PathProgramCache]: Analyzing trace with hash -235936943, now seen corresponding path program 1 times [2020-11-07 05:15:42,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:15:42,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053967764] [2020-11-07 05:15:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:15:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:15:42,709 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:15:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:15:42,734 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:15:42,765 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:15:42,766 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:15:42,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:15:42,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:15:42 BoogieIcfgContainer [2020-11-07 05:15:42,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:15:42,810 INFO L168 Benchmark]: Toolchain (without parser) took 2293.24 ms. Allocated memory is still 161.5 MB. Free memory was 137.7 MB in the beginning and 125.0 MB in the end (delta: 12.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. [2020-11-07 05:15:42,811 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 104.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:15:42,812 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.03 ms. Allocated memory is still 161.5 MB. Free memory was 137.1 MB in the beginning and 128.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 05:15:42,814 INFO L168 Benchmark]: Boogie Preprocessor took 65.04 ms. Allocated memory is still 161.5 MB. Free memory was 128.1 MB in the beginning and 126.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 05:15:42,815 INFO L168 Benchmark]: RCFGBuilder took 605.22 ms. Allocated memory is still 161.5 MB. Free memory was 126.7 MB in the beginning and 112.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-07 05:15:42,815 INFO L168 Benchmark]: TraceAbstraction took 1283.07 ms. Allocated memory is still 161.5 MB. Free memory was 144.8 MB in the beginning and 125.0 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-07 05:15:42,819 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 104.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 306.03 ms. Allocated memory is still 161.5 MB. Free memory was 137.1 MB in the beginning and 128.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.04 ms. Allocated memory is still 161.5 MB. Free memory was 128.1 MB in the beginning and 126.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 605.22 ms. Allocated memory is still 161.5 MB. Free memory was 126.7 MB in the beginning and 112.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1283.07 ms. Allocated memory is still 161.5 MB. Free memory was 144.8 MB in the beginning and 125.0 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * 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: [L32] int m; VAL [m={3:0}] [L33] m = 0 VAL [m={3:0}] [L35] CALL mutex_lock(&m) VAL [a={3:0}] [L20] EXPR \read(*a) VAL [\read(*a)=0, a={3:0}, a={3:0}] [L20] COND FALSE !(*a == 1) VAL [\read(*a)=0, a={3:0}, a={3:0}] [L21] *a = 1 VAL [a={3:0}, a={3:0}] [L35] RET mutex_lock(&m) VAL [m={3:0}] [L39] CALL mutex_lock(&m) VAL [a={3:0}] [L20] EXPR \read(*a) VAL [\read(*a)=1, a={3:0}, a={3:0}] [L20] COND TRUE *a == 1 VAL [\read(*a)=1, a={3:0}, a={3:0}] [L20] CALL err() [L16] CALL reach_error() [L3] __assert_fail("0", "mutex_lock_int.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 21 SDslu, 85 SDs, 0 SdLazy, 73 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 1491 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...