/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/loop-lit/gcnr2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:28:07,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:28:07,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:28:07,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:28:07,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:28:07,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:28:07,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:28:07,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:28:07,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:28:07,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:28:07,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:28:07,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:28:07,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:28:07,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:28:07,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:28:07,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:28:08,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:28:08,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:28:08,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:28:08,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:28:08,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:28:08,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:28:08,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:28:08,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:28:08,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:28:08,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:28:08,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:28:08,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:28:08,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:28:08,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:28:08,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:28:08,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:28:08,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:28:08,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:28:08,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:28:08,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:28:08,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:28:08,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:28:08,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:28:08,181 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:28:08,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:28:08,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:28:08,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:28:08,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:28:08,184 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:28:08,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:28:08,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:28:08,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:28:08,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:28:08,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:28:08,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:28:08,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:28:08,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:28:08,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:28:08,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:28:08,976 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:28:08,978 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:28:08,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gcnr2008.i [2021-02-21 21:28:09,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e266e610c/6057acc2427744be91a2109f87527b15/FLAG20f6dcd83 [2021-02-21 21:28:10,403 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:28:10,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i [2021-02-21 21:28:10,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e266e610c/6057acc2427744be91a2109f87527b15/FLAG20f6dcd83 [2021-02-21 21:28:10,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e266e610c/6057acc2427744be91a2109f87527b15 [2021-02-21 21:28:10,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:28:10,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:28:10,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:28:10,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:28:10,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:28:10,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:28:10" (1/1) ... [2021-02-21 21:28:10,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e3875df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:10, skipping insertion in model container [2021-02-21 21:28:10,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:28:10" (1/1) ... [2021-02-21 21:28:10,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:28:10,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:28:10,991 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i[895,908] [2021-02-21 21:28:11,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:28:11,055 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:28:11,101 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i[895,908] [2021-02-21 21:28:11,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:28:11,172 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:28:11,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:11 WrapperNode [2021-02-21 21:28:11,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:28:11,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:28:11,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:28:11,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:28:11,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:11" (1/1) ... [2021-02-21 21:28:11,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:11" (1/1) ... [2021-02-21 21:28:11,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:11" (1/1) ... [2021-02-21 21:28:11,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:11" (1/1) ... [2021-02-21 21:28:11,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:11" (1/1) ... [2021-02-21 21:28:11,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:11" (1/1) ... [2021-02-21 21:28:11,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:11" (1/1) ... [2021-02-21 21:28:11,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:28:11,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:28:11,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:28:11,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:28:11,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:11" (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 [2021-02-21 21:28:11,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:28:11,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:28:11,571 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:28:11,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:28:11,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:28:11,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:28:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:28:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:28:11,574 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 21:28:11,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 21:28:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:28:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:28:11,577 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:28:11,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:28:11,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:28:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:28:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:28:11,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:28:11,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:28:11,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:28:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:28:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:28:12,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:28:12,578 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:28:12,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:28:12 BoogieIcfgContainer [2021-02-21 21:28:12,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:28:12,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:28:12,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:28:12,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:28:12,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:28:10" (1/3) ... [2021-02-21 21:28:12,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1868b50d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:28:12, skipping insertion in model container [2021-02-21 21:28:12,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:28:11" (2/3) ... [2021-02-21 21:28:12,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1868b50d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:28:12, skipping insertion in model container [2021-02-21 21:28:12,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:28:12" (3/3) ... [2021-02-21 21:28:12,608 INFO L111 eAbstractionObserver]: Analyzing ICFG gcnr2008.i [2021-02-21 21:28:12,646 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:28:12,658 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:28:12,699 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:28:12,781 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:28:12,781 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:28:12,781 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:28:12,782 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:28:12,782 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:28:12,782 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:28:12,783 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:28:12,783 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:28:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-02-21 21:28:12,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 21:28:12,869 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:28:12,872 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] [2021-02-21 21:28:12,873 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:28:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:28:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1533429808, now seen corresponding path program 1 times [2021-02-21 21:28:12,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:28:12,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550105673] [2021-02-21 21:28:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:28:13,105 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:28:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:13,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:13,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:13,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:13,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:13,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:28:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:13,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:13,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:28:13,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550105673] [2021-02-21 21:28:13,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:28:13,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:28:13,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947344165] [2021-02-21 21:28:13,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:28:13,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:28:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:28:13,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:28:13,557 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2021-02-21 21:28:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:28:13,763 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-02-21 21:28:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:28:13,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2021-02-21 21:28:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:28:13,790 INFO L225 Difference]: With dead ends: 65 [2021-02-21 21:28:13,791 INFO L226 Difference]: Without dead ends: 45 [2021-02-21 21:28:13,799 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 [2021-02-21 21:28:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-21 21:28:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-02-21 21:28:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-21 21:28:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-02-21 21:28:13,933 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 24 [2021-02-21 21:28:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:28:13,935 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-02-21 21:28:13,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:28:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-02-21 21:28:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 21:28:13,941 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:28:13,941 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] [2021-02-21 21:28:13,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:28:13,945 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:28:13,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:28:13,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1970055643, now seen corresponding path program 1 times [2021-02-21 21:28:13,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:28:13,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944905199] [2021-02-21 21:28:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:28:13,970 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:28:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:28:14,073 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:28:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:28:14,102 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:28:14,145 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:28:14,146 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:28:14,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:28:14,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:28:14 BoogieIcfgContainer [2021-02-21 21:28:14,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:28:14,180 INFO L168 Benchmark]: Toolchain (without parser) took 3553.73 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 92.8 MB in the end (delta: 35.0 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:14,181 INFO L168 Benchmark]: CDTParser took 0.82 ms. Allocated memory is still 151.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:28:14,182 INFO L168 Benchmark]: CACSL2BoogieTranslator took 526.21 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:14,184 INFO L168 Benchmark]: Boogie Preprocessor took 140.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:14,185 INFO L168 Benchmark]: RCFGBuilder took 1261.83 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 126.9 MB in the end (delta: -12.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:14,186 INFO L168 Benchmark]: TraceAbstraction took 1589.56 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 92.8 MB in the end (delta: 34.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:14,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.82 ms. Allocated memory is still 151.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 526.21 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 140.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1261.83 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 126.9 MB in the end (delta: -12.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1589.56 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 92.8 MB in the end (delta: 34.1 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: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int x,y,z,w; [L26] EXPR w = 0 [L26] EXPR z = w = 0 [L26] EXPR y = z = w = 0 [L26] x = y = z = w = 0 [L27] COND FALSE !(__VERIFIER_nondet_int() && y < 10000) [L42] CALL __VERIFIER_assert(x >= 4 && y <= 2) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 63 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 41 SDslu, 4 SDs, 0 SdLazy, 8 SolverSat, 2 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=53occurred 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: 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...