/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-15 23:07:48,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 23:07:48,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 23:07:48,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 23:07:48,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 23:07:48,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 23:07:48,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 23:07:48,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 23:07:48,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 23:07:48,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 23:07:48,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 23:07:48,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 23:07:48,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 23:07:48,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 23:07:48,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 23:07:48,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 23:07:48,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 23:07:48,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 23:07:48,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 23:07:48,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 23:07:48,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-04-15 23:07:48,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 23:07:48,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 23:07:48,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 23:07:48,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 23:07:48,408 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 23:07:48,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 23:07:48,408 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 23:07:48,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 23:07:48,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 23:07:48,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 23:07:48,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 23:07:48,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 23:07:48,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 23:07:48,410 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 23:07:48,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 23:07:48,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 23:07:48,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 23:07:48,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 23:07:48,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 23:07:48,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 23:07:48,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 23:07:48,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 23:07:48,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 23:07:48,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 23:07:48,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 23:07:48,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 23:07:48,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 23:07:48,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-04-15 23:07:48,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 23:07:48,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 23:07:48,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 23:07:48,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 23:07:48,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-15 23:07:48,793 INFO L275 PluginConnector]: CDTParser initialized [2021-04-15 23:07:48,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2021-04-15 23:07:48,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944f2ce51/19c266986e054c01a269e0b1e100c220/FLAG5e86f30f7 [2021-04-15 23:07:49,497 INFO L306 CDTParser]: Found 1 translation units. [2021-04-15 23:07:49,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2021-04-15 23:07:49,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944f2ce51/19c266986e054c01a269e0b1e100c220/FLAG5e86f30f7 [2021-04-15 23:07:49,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944f2ce51/19c266986e054c01a269e0b1e100c220 [2021-04-15 23:07:49,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 23:07:49,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 23:07:49,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-15 23:07:49,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-15 23:07:49,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-15 23:07:49,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 11:07:49" (1/1) ... [2021-04-15 23:07:49,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67bf08e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:49, skipping insertion in model container [2021-04-15 23:07:49,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 11:07:49" (1/1) ... [2021-04-15 23:07:49,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-15 23:07:49,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-15 23:07:49,968 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] [2021-04-15 23:07:49,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 23:07:49,983 INFO L203 MainTranslator]: Completed pre-run [2021-04-15 23:07:50,003 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] [2021-04-15 23:07:50,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 23:07:50,018 INFO L208 MainTranslator]: Completed translation [2021-04-15 23:07:50,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:50 WrapperNode [2021-04-15 23:07:50,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-15 23:07:50,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 23:07:50,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 23:07:50,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 23:07:50,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:50" (1/1) ... [2021-04-15 23:07:50,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:50" (1/1) ... [2021-04-15 23:07:50,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:50" (1/1) ... [2021-04-15 23:07:50,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:50" (1/1) ... [2021-04-15 23:07:50,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:50" (1/1) ... [2021-04-15 23:07:50,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:50" (1/1) ... [2021-04-15 23:07:50,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:50" (1/1) ... [2021-04-15 23:07:50,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 23:07:50,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 23:07:50,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 23:07:50,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 23:07:50,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:50" (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 [2021-04-15 23:07:50,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-15 23:07:50,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 23:07:50,178 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-15 23:07:50,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-15 23:07:50,179 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2021-04-15 23:07:50,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-15 23:07:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-15 23:07:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-15 23:07:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-15 23:07:50,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-15 23:07:50,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-15 23:07:50,180 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2021-04-15 23:07:50,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-15 23:07:50,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-15 23:07:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-15 23:07:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 23:07:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-15 23:07:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-15 23:07:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-15 23:07:50,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 23:07:50,462 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-15 23:07:50,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 11:07:50 BoogieIcfgContainer [2021-04-15 23:07:50,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 23:07:50,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 23:07:50,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 23:07:50,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 23:07:50,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 11:07:49" (1/3) ... [2021-04-15 23:07:50,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430e38c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 11:07:50, skipping insertion in model container [2021-04-15 23:07:50,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:07:50" (2/3) ... [2021-04-15 23:07:50,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430e38c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 11:07:50, skipping insertion in model container [2021-04-15 23:07:50,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 11:07:50" (3/3) ... [2021-04-15 23:07:50,471 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2021-04-15 23:07:50,475 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 23:07:50,478 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 23:07:50,493 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-15 23:07:50,529 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 23:07:50,530 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 23:07:50,530 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 23:07:50,530 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 23:07:50,530 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 23:07:50,530 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 23:07:50,530 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 23:07:50,530 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 23:07:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-04-15 23:07:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 23:07:50,575 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 23:07:50,575 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 23:07:50,576 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 23:07:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 23:07:50,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1499484955, now seen corresponding path program 1 times [2021-04-15 23:07:50,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 23:07:50,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041754891] [2021-04-15 23:07:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 23:07:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:07:50,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:07:50,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:07:50,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:07:50,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:07:50,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 23:07:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:07:50,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:07:50,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:07:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 23:07:50,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041754891] [2021-04-15 23:07:50,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 23:07:50,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 23:07:50,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889421645] [2021-04-15 23:07:50,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 23:07:50,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 23:07:50,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 23:07:50,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 23:07:50,778 INFO L87 Difference]: Start difference. First operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:07:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 23:07:50,838 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2021-04-15 23:07:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 23:07:50,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-04-15 23:07:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 23:07:50,847 INFO L225 Difference]: With dead ends: 37 [2021-04-15 23:07:50,847 INFO L226 Difference]: Without dead ends: 19 [2021-04-15 23:07:50,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 23:07:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-04-15 23:07:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-04-15 23:07:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-15 23:07:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-04-15 23:07:50,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2021-04-15 23:07:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 23:07:50,882 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-04-15 23:07:50,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:07:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-04-15 23:07:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 23:07:50,883 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 23:07:50,883 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 23:07:50,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 23:07:50,884 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 23:07:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 23:07:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1713498874, now seen corresponding path program 1 times [2021-04-15 23:07:50,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 23:07:50,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81206409] [2021-04-15 23:07:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 23:07:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 23:07:50,910 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 23:07:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 23:07:50,926 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 23:07:50,945 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-15 23:07:50,946 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-15 23:07:50,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 23:07:50,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 11:07:50 BoogieIcfgContainer [2021-04-15 23:07:50,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 23:07:50,970 INFO L168 Benchmark]: Toolchain (without parser) took 1126.01 ms. Allocated memory is still 181.4 MB. Free memory was 147.8 MB in the beginning and 119.9 MB in the end (delta: 27.9 MB). Peak memory consumption was 28.1 MB. Max. memory is 8.0 GB. [2021-04-15 23:07:50,971 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 181.4 MB. Free memory was 164.6 MB in the beginning and 164.5 MB in the end (delta: 100.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-15 23:07:50,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.73 ms. Allocated memory is still 181.4 MB. Free memory was 147.6 MB in the beginning and 138.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-04-15 23:07:50,972 INFO L168 Benchmark]: Boogie Preprocessor took 64.28 ms. Allocated memory is still 181.4 MB. Free memory was 138.4 MB in the beginning and 165.0 MB in the end (delta: -26.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-04-15 23:07:50,977 INFO L168 Benchmark]: RCFGBuilder took 377.89 ms. Allocated memory is still 181.4 MB. Free memory was 165.0 MB in the beginning and 152.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-04-15 23:07:50,980 INFO L168 Benchmark]: TraceAbstraction took 503.49 ms. Allocated memory is still 181.4 MB. Free memory was 152.1 MB in the beginning and 119.9 MB in the end (delta: 32.2 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-04-15 23:07:50,989 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 181.4 MB. Free memory was 164.6 MB in the beginning and 164.5 MB in the end (delta: 100.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 171.73 ms. Allocated memory is still 181.4 MB. Free memory was 147.6 MB in the beginning and 138.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.28 ms. Allocated memory is still 181.4 MB. Free memory was 138.4 MB in the beginning and 165.0 MB in the end (delta: -26.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 377.89 ms. Allocated memory is still 181.4 MB. Free memory was 165.0 MB in the beginning and 152.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 503.49 ms. Allocated memory is still 181.4 MB. Free memory was 152.1 MB in the beginning and 119.9 MB in the end (delta: 32.2 MB). Peak memory consumption was 32.5 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; VAL [\old(x)=53, x=0] [L26] COND TRUE 1 VAL [\old(x)=0, x=0] [L28] CALL eval() VAL [\old(x)=0, x=0] [L16] COND TRUE 1 [L17] x=1 VAL [\old(x)=0, x=1] [L28] RET eval() VAL [\old(x)=0, x=1] [L29] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L6] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L7] reach_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 420.3ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 21.8ms, AutomataDifference: 84.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 6 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.0ms SsaConstructionTime, 42.2ms SatisfiabilityAnalysisTime, 96.7ms InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 42 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...