/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 0.2.0-7d8eed3 [2020-11-06 22:45:36,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:36,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:36,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:45:36,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:45:36,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:45:36,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:45:36,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:45:36,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:45:36,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:45:36,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:45:36,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:45:36,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:45:36,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:45:36,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:45:36,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:45:36,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:45:36,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:45:36,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:45:36,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:45:36,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:45:37,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:45:37,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:45:37,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:45:37,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:45:37,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:37,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:37,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:37,020 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 [2020-11-06 22:45:37,048 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:37,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:37,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:37,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:37,050 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:37,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:37,051 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:37,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:37,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:37,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:37,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:37,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:37,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:37,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:37,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:37,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:37,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:37,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:37,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:37,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:37,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:37,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:37,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:37,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:37,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:37,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:37,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:37,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:37,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:37,055 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:37,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:37,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:37,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:37,505 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:37,506 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:37,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-11-06 22:45:37,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/912adaf06/42070794a4fe4f21947543860b29fecb/FLAG50a5d1704 [2020-11-06 22:45:38,243 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:38,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-11-06 22:45:38,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/912adaf06/42070794a4fe4f21947543860b29fecb/FLAG50a5d1704 [2020-11-06 22:45:38,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/912adaf06/42070794a4fe4f21947543860b29fecb [2020-11-06 22:45:38,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:38,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:38,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:38,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:38,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:38,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:38,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9ad935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38, skipping insertion in model container [2020-11-06 22:45:38,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:38,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:38,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:38,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:38,844 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:38,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:38,880 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:38,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38 WrapperNode [2020-11-06 22:45:38,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:38,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:38,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:38,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:38,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:38,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:38,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:38,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:38,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:38,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:38,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38" (1/1) ... [2020-11-06 22:45:38,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:38,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:38,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:38,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:38,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:39,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:39,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:39,012 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:39,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:39,013 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-11-06 22:45:39,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:39,013 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:39,015 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-11-06 22:45:39,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:39,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:39,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:39,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:39,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:39,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:39,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:39,314 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:39,315 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-06 22:45:39,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:39 BoogieIcfgContainer [2020-11-06 22:45:39,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:39,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:39,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:39,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:39,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:38" (1/3) ... [2020-11-06 22:45:39,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da7f69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:39, skipping insertion in model container [2020-11-06 22:45:39,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:38" (2/3) ... [2020-11-06 22:45:39,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da7f69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:39, skipping insertion in model container [2020-11-06 22:45:39,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:39" (3/3) ... [2020-11-06 22:45:39,328 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-11-06 22:45:39,359 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:39,364 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:39,406 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:39,455 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:39,455 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:39,455 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:39,455 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:39,455 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:39,456 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:39,456 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:39,456 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-11-06 22:45:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-06 22:45:39,502 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:39,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:39,504 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:39,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:39,515 INFO L82 PathProgramCache]: Analyzing trace with hash -380414709, now seen corresponding path program 1 times [2020-11-06 22:45:39,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:39,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213260947] [2020-11-06 22:45:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:40,002 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-11-06 22:45:40,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:40,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213260947] [2020-11-06 22:45:40,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:40,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:45:40,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677503974] [2020-11-06 22:45:40,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:40,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:40,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:40,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:40,072 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-11-06 22:45:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:40,189 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2020-11-06 22:45:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:40,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-06 22:45:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:40,201 INFO L225 Difference]: With dead ends: 42 [2020-11-06 22:45:40,202 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:45:40,205 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 [2020-11-06 22:45:40,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:45:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-11-06 22:45:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:45:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-06 22:45:40,255 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2020-11-06 22:45:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:40,256 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-06 22:45:40,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-06 22:45:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:45:40,257 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:40,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:40,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:40,258 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:40,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1882206006, now seen corresponding path program 1 times [2020-11-06 22:45:40,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:40,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427036468] [2020-11-06 22:45:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:40,290 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:40,308 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:40,333 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:45:40,334 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:45:40,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:40,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:40 BoogieIcfgContainer [2020-11-06 22:45:40,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:40,368 INFO L168 Benchmark]: Toolchain (without parser) took 1739.06 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 115.0 MB in the end (delta: 16.6 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:40,369 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:40,370 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.27 ms. Allocated memory is still 156.2 MB. Free memory was 130.8 MB in the beginning and 121.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:40,371 INFO L168 Benchmark]: Boogie Preprocessor took 38.92 ms. Allocated memory is still 156.2 MB. Free memory was 121.8 MB in the beginning and 120.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:40,372 INFO L168 Benchmark]: RCFGBuilder took 395.33 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 107.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:40,373 INFO L168 Benchmark]: TraceAbstraction took 1046.70 ms. Allocated memory is still 156.2 MB. Free memory was 107.5 MB in the beginning and 115.0 MB in the end (delta: -7.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:40,377 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.27 ms. Allocated memory is still 156.2 MB. Free memory was 130.8 MB in the beginning and 121.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.92 ms. Allocated memory is still 156.2 MB. Free memory was 121.8 MB in the beginning and 120.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 395.33 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 107.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1046.70 ms. Allocated memory is still 156.2 MB. Free memory was 107.5 MB in the beginning and 115.0 MB in the end (delta: -7.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] CALL reach_error() VAL [\old(x)=0, x=1] [L3] __assert_fail("0", "while_infinite_loop_4.c", 3, "reach_error") VAL [\old(x)=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 6 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 5 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=27occurred 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: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 430 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...