/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:00:00,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:00:00,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:00:00,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:00:01,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:00:01,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:00:01,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:00:01,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:00:01,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:00:01,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:00:01,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:00:01,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:00:01,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:00:01,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:00:01,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:00:01,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:00:01,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:00:01,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:00:01,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:00:01,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:00:01,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:00:01,076 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:00:01,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:00:01,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:00:01,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:00:01,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:00:01,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:00:01,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:00:01,078 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:00:01,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:00:01,078 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:00:01,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:00:01,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:00:01,079 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:00:01,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:00:01,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:00:01,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:00:01,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:00:01,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:00:01,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:00:01,082 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:00:01,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:00:01,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:00:01,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:00:01,556 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:00:01,557 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:00:01,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-1.c [2021-02-23 18:00:01,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e329e4c4/f27ab5dab1c34a93a17f77630a25e140/FLAGbd9c422cf [2021-02-23 18:00:02,337 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:00:02,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-1.c [2021-02-23 18:00:02,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e329e4c4/f27ab5dab1c34a93a17f77630a25e140/FLAGbd9c422cf [2021-02-23 18:00:02,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e329e4c4/f27ab5dab1c34a93a17f77630a25e140 [2021-02-23 18:00:02,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:00:02,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:00:02,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:00:02,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:00:02,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:00:02,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:00:02" (1/1) ... [2021-02-23 18:00:02,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25576318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:02, skipping insertion in model container [2021-02-23 18:00:02,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:00:02" (1/1) ... [2021-02-23 18:00:02,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:00:02,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:00:02,975 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-1.c[5654,5667] [2021-02-23 18:00:02,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:00:02,994 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:00:03,029 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-1.c[5654,5667] [2021-02-23 18:00:03,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:00:03,053 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:00:03,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:03 WrapperNode [2021-02-23 18:00:03,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:00:03,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:00:03,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:00:03,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:00:03,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:03" (1/1) ... [2021-02-23 18:00:03,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:03" (1/1) ... [2021-02-23 18:00:03,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:03" (1/1) ... [2021-02-23 18:00:03,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:03" (1/1) ... [2021-02-23 18:00:03,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:03" (1/1) ... [2021-02-23 18:00:03,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:03" (1/1) ... [2021-02-23 18:00:03,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:03" (1/1) ... [2021-02-23 18:00:03,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:00:03,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:00:03,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:00:03,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:00:03,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:03" (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 [2021-02-23 18:00:03,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:00:03,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:00:03,236 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:00:03,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:00:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:00:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:00:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:00:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:00:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:00:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:00:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:00:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:00:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:00:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:00:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:00:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:00:03,892 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:00:03,893 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:00:03,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:00:03 BoogieIcfgContainer [2021-02-23 18:00:03,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:00:03,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:00:03,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:00:03,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:00:03,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:00:02" (1/3) ... [2021-02-23 18:00:03,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733d9ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:00:03, skipping insertion in model container [2021-02-23 18:00:03,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:00:03" (2/3) ... [2021-02-23 18:00:03,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733d9ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:00:03, skipping insertion in model container [2021-02-23 18:00:03,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:00:03" (3/3) ... [2021-02-23 18:00:03,913 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-1.c [2021-02-23 18:00:03,921 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:00:03,927 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:00:03,950 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:00:03,993 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:00:03,994 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:00:03,999 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:00:03,999 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:00:03,999 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:00:04,000 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:00:04,000 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:00:04,000 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:00:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states. [2021-02-23 18:00:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-02-23 18:00:04,076 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:00:04,078 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, 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, 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] [2021-02-23 18:00:04,078 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:00:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:00:04,090 INFO L82 PathProgramCache]: Analyzing trace with hash -733530489, now seen corresponding path program 1 times [2021-02-23 18:00:04,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:00:04,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206981828] [2021-02-23 18:00:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:00:04,223 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:00:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:00:04,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:04,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:04,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:04,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:00:04,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:04,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:04,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:00:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:00:04,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:04,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:00:04,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206981828] [2021-02-23 18:00:04,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:00:04,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:00:04,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552023921] [2021-02-23 18:00:04,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:00:04,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:00:04,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:00:04,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:00:04,705 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 4 states. [2021-02-23 18:00:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:00:05,667 INFO L93 Difference]: Finished difference Result 376 states and 517 transitions. [2021-02-23 18:00:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:00:05,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2021-02-23 18:00:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:00:05,686 INFO L225 Difference]: With dead ends: 376 [2021-02-23 18:00:05,687 INFO L226 Difference]: Without dead ends: 264 [2021-02-23 18:00:05,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:00:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-02-23 18:00:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-02-23 18:00:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2021-02-23 18:00:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 348 transitions. [2021-02-23 18:00:05,826 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 348 transitions. Word has length 111 [2021-02-23 18:00:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:00:05,827 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 348 transitions. [2021-02-23 18:00:05,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:00:05,827 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 348 transitions. [2021-02-23 18:00:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-02-23 18:00:05,830 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:00:05,831 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, 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, 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] [2021-02-23 18:00:05,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:00:05,831 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:00:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:00:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash -733522274, now seen corresponding path program 1 times [2021-02-23 18:00:05,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:00:05,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031468649] [2021-02-23 18:00:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:00:05,837 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:00:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:00:05,879 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:00:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:00:05,915 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:00:05,973 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:00:05,973 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:00:05,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:00:05,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:00:05 BoogieIcfgContainer [2021-02-23 18:00:05,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:00:06,000 INFO L168 Benchmark]: Toolchain (without parser) took 3283.29 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 127.5 MB in the beginning and 97.4 MB in the end (delta: 30.1 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. [2021-02-23 18:00:06,001 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:00:06,002 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.82 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 115.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:00:06,003 INFO L168 Benchmark]: Boogie Preprocessor took 58.54 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:00:06,004 INFO L168 Benchmark]: RCFGBuilder took 779.03 ms. Allocated memory is still 151.0 MB. Free memory was 113.5 MB in the beginning and 122.6 MB in the end (delta: -9.2 MB). Peak memory consumption was 26.3 MB. Max. memory is 8.0 GB. [2021-02-23 18:00:06,005 INFO L168 Benchmark]: TraceAbstraction took 2096.96 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 122.1 MB in the beginning and 97.4 MB in the end (delta: 24.7 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:00:06,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 321.82 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 115.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.54 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 779.03 ms. Allocated memory is still 151.0 MB. Free memory was 113.5 MB in the beginning and 122.6 MB in the end (delta: -9.2 MB). Peak memory consumption was 26.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2096.96 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 122.1 MB in the beginning and 97.4 MB in the end (delta: 24.7 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 233]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L8] int p1 = __VERIFIER_nondet_int(); [L9] int lk1; [L11] int p2 = __VERIFIER_nondet_int(); [L12] int lk2; [L14] int p3 = __VERIFIER_nondet_int(); [L15] int lk3; [L17] int p4 = __VERIFIER_nondet_int(); [L18] int lk4; [L20] int p5 = __VERIFIER_nondet_int(); [L21] int lk5; [L23] int p6 = __VERIFIER_nondet_int(); [L24] int lk6; [L26] int p7 = __VERIFIER_nondet_int(); [L27] int lk7; [L29] int p8 = __VERIFIER_nondet_int(); [L30] int lk8; [L32] int p9 = __VERIFIER_nondet_int(); [L33] int lk9; [L35] int p10 = __VERIFIER_nondet_int(); [L36] int lk10; [L38] int p11 = __VERIFIER_nondet_int(); [L39] int lk11; [L41] int p12 = __VERIFIER_nondet_int(); [L42] int lk12; [L44] int p13 = __VERIFIER_nondet_int(); [L45] int lk13; [L47] int p14 = __VERIFIER_nondet_int(); [L48] int lk14; [L50] int p15 = __VERIFIER_nondet_int(); [L51] int lk15; [L54] int cond; [L56] COND TRUE 1 [L57] cond = __VERIFIER_nondet_int() [L58] COND FALSE !(cond == 0) [L61] lk1 = 0 [L63] lk2 = 0 [L65] lk3 = 0 [L67] lk4 = 0 [L69] lk5 = 0 [L71] lk6 = 0 [L73] lk7 = 0 [L75] lk8 = 0 [L77] lk9 = 0 [L79] lk10 = 0 [L81] lk11 = 0 [L83] lk12 = 0 [L85] lk13 = 0 [L87] lk14 = 0 [L89] lk15 = 0 [L93] COND FALSE !(p1 != 0) [L97] COND FALSE !(p2 != 0) [L101] COND FALSE !(p3 != 0) [L105] COND FALSE !(p4 != 0) [L109] COND FALSE !(p5 != 0) [L113] COND FALSE !(p6 != 0) [L117] COND FALSE !(p7 != 0) [L121] COND FALSE !(p8 != 0) [L125] COND FALSE !(p9 != 0) [L129] COND FALSE !(p10 != 0) [L133] COND FALSE !(p11 != 0) [L137] COND FALSE !(p12 != 0) [L141] COND FALSE !(p13 != 0) [L145] COND FALSE !(p14 != 0) [L149] COND FALSE !(p15 != 0) [L155] COND FALSE !(p1 != 0) [L160] COND FALSE !(p2 != 0) [L233] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 180 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 242 SDtfs, 442 SDslu, 19 SDs, 0 SdLazy, 214 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...