/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/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:18:28,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:18:28,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:18:28,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:18:28,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:18:28,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:18:28,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:18:28,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:18:28,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:18:28,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:18:28,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:18:28,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:18:28,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:18:28,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:18:28,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:18:28,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:18:28,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:18:28,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:18:28,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:18:28,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:18:28,669 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 21:18:28,695 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:18:28,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:18:28,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:18:28,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:18:28,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:18:28,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:18:28,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:18:28,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:18:28,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:18:28,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:18:28,705 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:18:28,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:18:28,706 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:18:28,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:18:28,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:18:28,707 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:18:28,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:18:28,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:18:28,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:18:28,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:18:28,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:18:28,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:18:28,709 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:18:29,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:18:29,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:18:29,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:18:29,249 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:18:29,250 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:18:29,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2021-02-21 21:18:29,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51a1a6f57/696db1cff19f44ce84581eca99945c2f/FLAG90c919809 [2021-02-21 21:18:30,034 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:18:30,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2021-02-21 21:18:30,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51a1a6f57/696db1cff19f44ce84581eca99945c2f/FLAG90c919809 [2021-02-21 21:18:30,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51a1a6f57/696db1cff19f44ce84581eca99945c2f [2021-02-21 21:18:30,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:18:30,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:18:30,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:18:30,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:18:30,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:18:30,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:18:30" (1/1) ... [2021-02-21 21:18:30,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7128edb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30, skipping insertion in model container [2021-02-21 21:18:30,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:18:30" (1/1) ... [2021-02-21 21:18:30,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:18:30,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:18:30,608 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c[333,346] [2021-02-21 21:18:30,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:18:30,633 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:18:30,649 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c[333,346] [2021-02-21 21:18:30,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:18:30,672 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:18:30,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30 WrapperNode [2021-02-21 21:18:30,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:18:30,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:18:30,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:18:30,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:18:30,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30" (1/1) ... [2021-02-21 21:18:30,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30" (1/1) ... [2021-02-21 21:18:30,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30" (1/1) ... [2021-02-21 21:18:30,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30" (1/1) ... [2021-02-21 21:18:30,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30" (1/1) ... [2021-02-21 21:18:30,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30" (1/1) ... [2021-02-21 21:18:30,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30" (1/1) ... [2021-02-21 21:18:30,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:18:30,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:18:30,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:18:30,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:18:30,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30" (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 21:18:30,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:18:30,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:18:30,830 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:18:30,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:18:30,830 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2021-02-21 21:18:30,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:18:30,831 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:18:30,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:18:30,831 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:18:30,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:18:30,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:18:30,832 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2021-02-21 21:18:30,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:18:30,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:18:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:18:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:18:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:18:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:18:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:18:31,303 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:18:31,303 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-21 21:18:31,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:18:31 BoogieIcfgContainer [2021-02-21 21:18:31,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:18:31,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:18:31,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:18:31,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:18:31,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:18:30" (1/3) ... [2021-02-21 21:18:31,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34777c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:18:31, skipping insertion in model container [2021-02-21 21:18:31,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:30" (2/3) ... [2021-02-21 21:18:31,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34777c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:18:31, skipping insertion in model container [2021-02-21 21:18:31,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:18:31" (3/3) ... [2021-02-21 21:18:31,333 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2021-02-21 21:18:31,351 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:18:31,362 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:18:31,403 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:18:31,442 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:18:31,442 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:18:31,442 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:18:31,443 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:18:31,443 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:18:31,443 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:18:31,443 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:18:31,444 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:18:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-02-21 21:18:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 21:18:31,487 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:31,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:31,489 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash -704668426, now seen corresponding path program 1 times [2021-02-21 21:18:31,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:31,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333503570] [2021-02-21 21:18:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:31,613 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:31,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,971 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-21 21:18:31,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:32,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:32,044 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 21:18:32,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333503570] [2021-02-21 21:18:32,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:32,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:18:32,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386724464] [2021-02-21 21:18:32,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:18:32,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:32,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:18:32,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:18:32,074 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2021-02-21 21:18:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:32,193 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2021-02-21 21:18:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:18:32,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-02-21 21:18:32,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:32,206 INFO L225 Difference]: With dead ends: 48 [2021-02-21 21:18:32,207 INFO L226 Difference]: Without dead ends: 28 [2021-02-21 21:18:32,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:18:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-21 21:18:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-02-21 21:18:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-02-21 21:18:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-02-21 21:18:32,271 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2021-02-21 21:18:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:32,271 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-02-21 21:18:32,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:18:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-02-21 21:18:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 21:18:32,273 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:32,273 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] [2021-02-21 21:18:32,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:18:32,274 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:32,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2017543656, now seen corresponding path program 1 times [2021-02-21 21:18:32,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:32,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435200392] [2021-02-21 21:18:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:32,279 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:18:32,311 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:18:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:18:32,331 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:18:32,362 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:18:32,362 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:18:32,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:18:32,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:18:32 BoogieIcfgContainer [2021-02-21 21:18:32,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:18:32,387 INFO L168 Benchmark]: Toolchain (without parser) took 1976.57 ms. Allocated memory is still 152.0 MB. Free memory was 128.2 MB in the beginning and 95.8 MB in the end (delta: 32.4 MB). Peak memory consumption was 31.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:32,389 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 152.0 MB. Free memory is still 138.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:18:32,392 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.84 ms. Allocated memory is still 152.0 MB. Free memory was 127.1 MB in the beginning and 118.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:32,394 INFO L168 Benchmark]: Boogie Preprocessor took 42.56 ms. Allocated memory is still 152.0 MB. Free memory was 117.9 MB in the beginning and 116.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:32,395 INFO L168 Benchmark]: RCFGBuilder took 588.52 ms. Allocated memory is still 152.0 MB. Free memory was 116.5 MB in the beginning and 131.8 MB in the end (delta: -15.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:32,396 INFO L168 Benchmark]: TraceAbstraction took 1073.39 ms. Allocated memory is still 152.0 MB. Free memory was 131.5 MB in the beginning and 95.8 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:32,400 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 152.0 MB. Free memory is still 138.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.84 ms. Allocated memory is still 152.0 MB. Free memory was 127.1 MB in the beginning and 118.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.56 ms. Allocated memory is still 152.0 MB. Free memory was 117.9 MB in the beginning and 116.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 588.52 ms. Allocated memory is still 152.0 MB. Free memory was 116.5 MB in the beginning and 131.8 MB in the end (delta: -15.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1073.39 ms. Allocated memory is still 152.0 MB. Free memory was 131.5 MB in the beginning and 95.8 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int x=0; [L26] COND TRUE 1 [L28] CALL eval() [L16] COND TRUE 1 [L17] x=1 [L28] RET eval() [L29] CALL __VERIFIER_assert(x==0) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 7 SDslu, 4 SDs, 0 SdLazy, 13 SolverSat, 4 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 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...