/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:49:13,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:49:13,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:49:13,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:49:13,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:49:13,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:49:13,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:49:13,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:49:13,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:49:13,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:49:13,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:49:13,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:49:13,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:49:13,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:49:13,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:49:13,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:49:13,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:49:13,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:49:13,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:49:13,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:49:13,360 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:49:13,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:49:13,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:49:13,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:49:13,374 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:49:13,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:49:13,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:49:13,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:49:13,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:49:13,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:49:13,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:49:13,376 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:49:13,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:49:13,376 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:49:13,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:49:13,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:49:13,377 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:49:13,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:49:13,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:49:13,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:49:13,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:49:13,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:49:13,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:49:13,379 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:49:13,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:49:13,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:49:13,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:49:13,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:49:13,789 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:49:13,791 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:49:13,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2021-02-24 04:49:13,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32cebbf7/6b7d027f03394c688c1d5ad1e978e206/FLAG63c8593fe [2021-02-24 04:49:14,494 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:49:14,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2021-02-24 04:49:14,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32cebbf7/6b7d027f03394c688c1d5ad1e978e206/FLAG63c8593fe [2021-02-24 04:49:14,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32cebbf7/6b7d027f03394c688c1d5ad1e978e206 [2021-02-24 04:49:14,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:49:14,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:49:14,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:49:14,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:49:14,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:49:14,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:49:14" (1/1) ... [2021-02-24 04:49:14,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4873ad51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:14, skipping insertion in model container [2021-02-24 04:49:14,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:49:14" (1/1) ... [2021-02-24 04:49:14,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:49:14,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:49:15,053 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/gj2007b.i[895,908] [2021-02-24 04:49:15,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:49:15,075 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:49:15,090 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/gj2007b.i[895,908] [2021-02-24 04:49:15,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:49:15,111 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:49:15,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:15 WrapperNode [2021-02-24 04:49:15,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:49:15,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:49:15,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:49:15,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:49:15,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:15" (1/1) ... [2021-02-24 04:49:15,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:15" (1/1) ... [2021-02-24 04:49:15,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:15" (1/1) ... [2021-02-24 04:49:15,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:15" (1/1) ... [2021-02-24 04:49:15,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:15" (1/1) ... [2021-02-24 04:49:15,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:15" (1/1) ... [2021-02-24 04:49:15,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:15" (1/1) ... [2021-02-24 04:49:15,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:49:15,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:49:15,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:49:15,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:49:15,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:15" (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 [2021-02-24 04:49:15,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:49:15,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:49:15,275 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:49:15,275 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:49:15,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:49:15,275 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:49:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:49:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:49:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 04:49:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 04:49:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:49:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:49:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:49:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:49:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:49:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:49:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:49:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:49:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:49:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:49:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:49:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:49:15,551 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:49:15,552 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:49:15,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:49:15 BoogieIcfgContainer [2021-02-24 04:49:15,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:49:15,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:49:15,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:49:15,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:49:15,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:49:14" (1/3) ... [2021-02-24 04:49:15,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6127a2d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:49:15, skipping insertion in model container [2021-02-24 04:49:15,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:49:15" (2/3) ... [2021-02-24 04:49:15,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6127a2d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:49:15, skipping insertion in model container [2021-02-24 04:49:15,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:49:15" (3/3) ... [2021-02-24 04:49:15,576 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2021-02-24 04:49:15,597 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:49:15,601 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:49:15,623 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:49:15,650 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:49:15,650 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:49:15,651 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:49:15,651 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:49:15,651 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:49:15,651 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:49:15,651 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:49:15,652 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:49:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-24 04:49:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 04:49:15,678 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:49:15,679 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] [2021-02-24 04:49:15,680 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:49:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:49:15,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1543512865, now seen corresponding path program 1 times [2021-02-24 04:49:15,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:49:15,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580513253] [2021-02-24 04:49:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:49:15,785 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:49:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:15,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:15,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:15,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:15,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:16,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:49:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:16,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:16,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:49:16,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580513253] [2021-02-24 04:49:16,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:49:16,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:49:16,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149364292] [2021-02-24 04:49:16,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:49:16,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:49:16,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:49:16,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:49:16,121 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-02-24 04:49:16,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:49:16,271 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-02-24 04:49:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:49:16,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-24 04:49:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:49:16,285 INFO L225 Difference]: With dead ends: 50 [2021-02-24 04:49:16,286 INFO L226 Difference]: Without dead ends: 31 [2021-02-24 04:49:16,291 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 [2021-02-24 04:49:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-24 04:49:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-24 04:49:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-24 04:49:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-02-24 04:49:16,379 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2021-02-24 04:49:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:49:16,380 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-02-24 04:49:16,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:49:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-02-24 04:49:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 04:49:16,381 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:49:16,381 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] [2021-02-24 04:49:16,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:49:16,383 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:49:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:49:16,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1557365680, now seen corresponding path program 1 times [2021-02-24 04:49:16,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:49:16,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847985853] [2021-02-24 04:49:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:49:16,399 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:49:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:16,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:16,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:16,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:16,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:49:16,550 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-24 04:49:16,551 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-24 04:49:16,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:16,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:49:16,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:16,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:49:16,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:16,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:16,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:49:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:16,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:16,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:49:16,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847985853] [2021-02-24 04:49:16,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:49:16,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 04:49:16,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475172091] [2021-02-24 04:49:16,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 04:49:16,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:49:16,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 04:49:16,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-24 04:49:16,642 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2021-02-24 04:49:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:49:16,888 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-02-24 04:49:16,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:49:16,889 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-02-24 04:49:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:49:16,890 INFO L225 Difference]: With dead ends: 46 [2021-02-24 04:49:16,891 INFO L226 Difference]: Without dead ends: 38 [2021-02-24 04:49:16,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-24 04:49:16,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-24 04:49:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-02-24 04:49:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-24 04:49:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-02-24 04:49:16,906 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2021-02-24 04:49:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:49:16,907 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-02-24 04:49:16,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 04:49:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-02-24 04:49:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-24 04:49:16,908 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:49:16,908 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] [2021-02-24 04:49:16,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:49:16,909 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:49:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:49:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2003455287, now seen corresponding path program 1 times [2021-02-24 04:49:16,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:49:16,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305005613] [2021-02-24 04:49:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:49:16,931 WARN L141 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-02-24 04:49:16,946 WARN L147 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-02-24 04:49:16,953 WARN L141 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-02-24 04:49:16,956 WARN L147 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-02-24 04:49:16,967 WARN L141 QuantifierPusher]: treesize reduction 16, result has 33.3 percent of original size [2021-02-24 04:49:16,985 WARN L147 QuantifierPusher]: treesize reduction 16, result has 33.3 percent of original size 8 [2021-02-24 04:49:16,989 WARN L141 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size [2021-02-24 04:49:16,992 WARN L147 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24 [2021-02-24 04:49:16,994 WARN L141 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-02-24 04:49:16,997 WARN L147 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size 19 [2021-02-24 04:49:17,000 WARN L141 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-02-24 04:49:17,002 WARN L147 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size 19 [2021-02-24 04:49:17,011 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-24 04:49:17,016 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:49:17,021 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:17,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:49:17,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:17,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 04:49:17,033 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-24 04:49:17,038 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size [2021-02-24 04:49:17,041 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size 44 [2021-02-24 04:49:17,042 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-24 04:49:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:49:17,067 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:49:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:49:17,093 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:49:17,138 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:49:17,139 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:49:17,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:49:17,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:49:17 BoogieIcfgContainer [2021-02-24 04:49:17,157 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:49:17,160 INFO L168 Benchmark]: Toolchain (without parser) took 2305.12 ms. Allocated memory is still 151.0 MB. Free memory was 107.7 MB in the beginning and 81.2 MB in the end (delta: 26.5 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:17,161 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:49:17,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.92 ms. Allocated memory is still 151.0 MB. Free memory was 106.6 MB in the beginning and 97.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:17,164 INFO L168 Benchmark]: Boogie Preprocessor took 32.70 ms. Allocated memory is still 151.0 MB. Free memory was 97.0 MB in the beginning and 95.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:17,169 INFO L168 Benchmark]: RCFGBuilder took 410.02 ms. Allocated memory is still 151.0 MB. Free memory was 95.4 MB in the beginning and 121.4 MB in the end (delta: -26.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:17,170 INFO L168 Benchmark]: TraceAbstraction took 1595.42 ms. Allocated memory is still 151.0 MB. Free memory was 121.0 MB in the beginning and 81.2 MB in the end (delta: 39.8 MB). Peak memory consumption was 40.2 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:17,182 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.92 ms. Allocated memory is still 151.0 MB. Free memory was 106.6 MB in the beginning and 97.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.70 ms. Allocated memory is still 151.0 MB. Free memory was 97.0 MB in the beginning and 95.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 410.02 ms. Allocated memory is still 151.0 MB. Free memory was 95.4 MB in the beginning and 121.4 MB in the end (delta: -26.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1595.42 ms. Allocated memory is still 151.0 MB. Free memory was 121.0 MB in the beginning and 81.2 MB in the end (delta: 39.8 MB). Peak memory consumption was 40.2 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 = 0; [L26] int m = 0; [L27] int n = __VERIFIER_nondet_int(); [L28] COND TRUE x < n [L29] COND TRUE __VERIFIER_nondet_int() [L30] m = x [L32] x = x + 1 [L28] COND FALSE !(x < n) [L34] CALL __VERIFIER_assert((m >= 0 || n <= 0)) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 69 SDslu, 57 SDs, 0 SdLazy, 93 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 2 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...