/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/loop-lit/gcnr2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:40:17,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:40:17,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:40:17,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:40:17,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:40:17,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:40:17,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:40:17,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:40:17,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:40:17,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:40:17,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:40:17,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:40:17,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:40:17,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:40:17,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:40:17,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:40:17,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:40:17,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:40:17,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:40:17,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:40:17,819 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 06:40:17,847 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:40:17,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:40:17,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:40:17,856 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:40:17,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:40:17,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:40:17,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:40:17,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:40:17,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:40:17,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:40:17,859 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:40:17,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:40:17,860 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:40:17,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:40:17,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:40:17,861 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:40:17,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:40:17,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:40:17,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:40:17,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:40:17,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:40:17,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:40:17,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:40:18,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:40:18,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:40:18,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:40:18,396 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:40:18,397 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:40:18,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-11-07 06:40:18,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be0caf6ea/75319978ca37404395443534f0eacb3e/FLAG08cbb2804 [2020-11-07 06:40:19,208 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:40:19,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-11-07 06:40:19,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be0caf6ea/75319978ca37404395443534f0eacb3e/FLAG08cbb2804 [2020-11-07 06:40:19,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be0caf6ea/75319978ca37404395443534f0eacb3e [2020-11-07 06:40:19,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:40:19,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:40:19,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:40:19,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:40:19,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:40:19,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:40:19" (1/1) ... [2020-11-07 06:40:19,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3163f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19, skipping insertion in model container [2020-11-07 06:40:19,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:40:19" (1/1) ... [2020-11-07 06:40:19,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:40:19,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:40:19,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:40:19,852 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:40:19,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:40:19,895 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:40:19,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19 WrapperNode [2020-11-07 06:40:19,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:40:19,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:40:19,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:40:19,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:40:19,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19" (1/1) ... [2020-11-07 06:40:19,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19" (1/1) ... [2020-11-07 06:40:19,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19" (1/1) ... [2020-11-07 06:40:19,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19" (1/1) ... [2020-11-07 06:40:19,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19" (1/1) ... [2020-11-07 06:40:19,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19" (1/1) ... [2020-11-07 06:40:19,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19" (1/1) ... [2020-11-07 06:40:19,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:40:19,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:40:19,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:40:19,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:40:19,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19" (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 06:40:20,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:40:20,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:40:20,049 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:40:20,050 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:40:20,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:40:20,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:40:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:40:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:40:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:40:20,051 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:40:20,051 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:40:20,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:40:20,051 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:40:20,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:40:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:40:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:40:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:40:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:40:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:40:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:40:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:40:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:40:20,773 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:40:20,774 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:40:20,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:40:20 BoogieIcfgContainer [2020-11-07 06:40:20,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:40:20,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:40:20,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:40:20,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:40:20,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:40:19" (1/3) ... [2020-11-07 06:40:20,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eae86b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:40:20, skipping insertion in model container [2020-11-07 06:40:20,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:40:19" (2/3) ... [2020-11-07 06:40:20,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eae86b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:40:20, skipping insertion in model container [2020-11-07 06:40:20,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:40:20" (3/3) ... [2020-11-07 06:40:20,795 INFO L111 eAbstractionObserver]: Analyzing ICFG gcnr2008.i [2020-11-07 06:40:20,815 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:40:20,821 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:40:20,840 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:40:20,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:40:20,887 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:40:20,887 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:40:20,888 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:40:20,888 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:40:20,888 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:40:20,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:40:20,888 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:40:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-11-07 06:40:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-07 06:40:20,923 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:20,924 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] [2020-11-07 06:40:20,925 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash -561261665, now seen corresponding path program 1 times [2020-11-07 06:40:20,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:20,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009876293] [2020-11-07 06:40:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:21,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:21,270 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 06:40:21,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009876293] [2020-11-07 06:40:21,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:40:21,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:40:21,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842644101] [2020-11-07 06:40:21,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:40:21,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:21,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:40:21,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:40:21,313 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 3 states. [2020-11-07 06:40:21,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:21,433 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-11-07 06:40:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:40:21,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-11-07 06:40:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:21,449 INFO L225 Difference]: With dead ends: 72 [2020-11-07 06:40:21,449 INFO L226 Difference]: Without dead ends: 47 [2020-11-07 06:40:21,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:40:21,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-07 06:40:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-07 06:40:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-07 06:40:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-11-07 06:40:21,581 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 26 [2020-11-07 06:40:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:21,582 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-11-07 06:40:21,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:40:21,582 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-11-07 06:40:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-07 06:40:21,584 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:21,587 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] [2020-11-07 06:40:21,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:40:21,588 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash -774433740, now seen corresponding path program 1 times [2020-11-07 06:40:21,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:21,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242702134] [2020-11-07 06:40:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:40:21,656 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:40:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:40:21,680 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:40:21,714 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:40:21,715 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:40:21,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:40:21,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:40:21 BoogieIcfgContainer [2020-11-07 06:40:21,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:40:21,768 INFO L168 Benchmark]: Toolchain (without parser) took 2202.80 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 97.6 MB in the end (delta: 29.9 MB). Peak memory consumption was 30.9 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:21,769 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 119.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:40:21,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.40 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:21,772 INFO L168 Benchmark]: Boogie Preprocessor took 45.58 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 115.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:21,773 INFO L168 Benchmark]: RCFGBuilder took 832.70 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 131.8 MB in the end (delta: -16.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:21,774 INFO L168 Benchmark]: TraceAbstraction took 982.99 ms. Allocated memory is still 151.0 MB. Free memory was 131.3 MB in the beginning and 97.6 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:21,778 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 119.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 325.40 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.58 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 115.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 832.70 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 131.8 MB in the end (delta: -16.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 982.99 ms. Allocated memory is still 151.0 MB. Free memory was 131.3 MB in the beginning and 97.6 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int x,y,z,w; [L26] EXPR w = 0 VAL [w=0] [L26] EXPR z = w = 0 VAL [w=0, z=0] [L26] EXPR y = z = w = 0 VAL [w=0, y=0, z=0] [L26] x = y = z = w = 0 VAL [w=0, x=0, y=0, z=0] [L27] COND FALSE !(__VERIFIER_nondet_int() && y < 10000) VAL [__VERIFIER_nondet_int()=0, w=0, x=0, y=0, z=0] [L42] CALL __VERIFIER_assert(x >= 4 && y <= 2) VAL [\old(cond)=0] [L18] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "assert.h", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 63 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 42 SDslu, 4 SDs, 0 SdLazy, 8 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred 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: 0.1s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 25 ConstructedInterpolants, 0 QuantifiedInterpolants, 1225 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...