/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/recursive/recHanoi02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:59:25,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:59:25,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:59:25,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:59:25,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:59:25,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:59:25,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:59:25,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:59:25,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:59:25,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:59:25,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:59:25,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:59:25,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:59:25,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:59:25,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:59:25,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:59:25,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:59:25,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:59:25,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:59:25,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:59:25,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:59:25,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:59:25,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:59:25,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:59:25,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:59:25,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:59:25,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:59:25,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:59:25,654 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 [2020-10-23 17:59:25,713 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:59:25,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:59:25,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:59:25,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:59:25,718 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:59:25,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:59:25,720 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:59:25,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:59:25,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:59:25,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:59:25,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:59:25,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:59:25,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:59:25,723 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:59:25,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:59:25,723 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:59:25,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:59:25,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:59:25,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:59:25,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:59:25,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:59:25,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:59:25,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:59:25,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:59:25,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:59:25,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:59:25,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:59:25,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:59:25,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:59:25,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:59:26,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:59:26,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:59:26,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:59:26,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:59:26,181 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:59:26,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-10-23 17:59:26,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/840906d7c/f7a6bb070fa34c6e96a6a36c8c813960/FLAG19655edca [2020-10-23 17:59:26,848 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:59:26,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-10-23 17:59:26,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/840906d7c/f7a6bb070fa34c6e96a6a36c8c813960/FLAG19655edca [2020-10-23 17:59:27,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/840906d7c/f7a6bb070fa34c6e96a6a36c8c813960 [2020-10-23 17:59:27,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:59:27,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:59:27,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:59:27,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:59:27,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:59:27,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:59:27" (1/1) ... [2020-10-23 17:59:27,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ebef41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27, skipping insertion in model container [2020-10-23 17:59:27,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:59:27" (1/1) ... [2020-10-23 17:59:27,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:59:27,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:59:27,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:59:27,442 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:59:27,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:59:27,473 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:59:27,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27 WrapperNode [2020-10-23 17:59:27,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:59:27,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:59:27,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:59:27,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:59:27,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27" (1/1) ... [2020-10-23 17:59:27,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27" (1/1) ... [2020-10-23 17:59:27,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27" (1/1) ... [2020-10-23 17:59:27,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27" (1/1) ... [2020-10-23 17:59:27,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27" (1/1) ... [2020-10-23 17:59:27,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27" (1/1) ... [2020-10-23 17:59:27,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27" (1/1) ... [2020-10-23 17:59:27,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:59:27,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:59:27,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:59:27,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:59:27,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27" (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 [2020-10-23 17:59:27,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:59:27,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:59:27,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:59:27,588 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-10-23 17:59:27,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:59:27,589 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:59:27,589 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:59:27,590 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:59:27,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:59:27,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 17:59:27,590 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-10-23 17:59:27,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:59:27,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:59:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:59:27,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:59:27,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:59:27,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:59:27,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:59:27,850 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:59:27,850 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 17:59:27,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:59:27 BoogieIcfgContainer [2020-10-23 17:59:27,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:59:27,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:59:27,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:59:27,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:59:27,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:59:27" (1/3) ... [2020-10-23 17:59:27,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dba959c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:59:27, skipping insertion in model container [2020-10-23 17:59:27,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:59:27" (2/3) ... [2020-10-23 17:59:27,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dba959c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:59:27, skipping insertion in model container [2020-10-23 17:59:27,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:59:27" (3/3) ... [2020-10-23 17:59:27,862 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi02-2.c [2020-10-23 17:59:27,875 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:59:27,881 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:59:27,897 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:59:27,973 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:59:27,976 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:59:27,976 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:59:27,977 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:59:27,977 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:59:27,977 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:59:27,977 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:59:27,977 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:59:28,022 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-23 17:59:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 17:59:28,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:59:28,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:59:28,041 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:59:28,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:59:28,061 INFO L82 PathProgramCache]: Analyzing trace with hash -874294957, now seen corresponding path program 1 times [2020-10-23 17:59:28,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:59:28,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24716616] [2020-10-23 17:59:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:59:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:28,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:59:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:28,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:59:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:59:28,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24716616] [2020-10-23 17:59:28,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:59:28,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 17:59:28,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083971452] [2020-10-23 17:59:28,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 17:59:28,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:59:28,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 17:59:28,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 17:59:28,625 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-23 17:59:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:59:28,893 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-23 17:59:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 17:59:28,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 17:59:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:59:28,905 INFO L225 Difference]: With dead ends: 39 [2020-10-23 17:59:28,905 INFO L226 Difference]: Without dead ends: 21 [2020-10-23 17:59:28,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:59:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-23 17:59:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-23 17:59:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-23 17:59:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-23 17:59:28,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-23 17:59:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:59:28,960 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-23 17:59:28,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 17:59:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-23 17:59:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 17:59:28,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:59:28,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:59:28,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:59:28,963 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:59:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:59:28,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1992247557, now seen corresponding path program 1 times [2020-10-23 17:59:28,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:59:28,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779349966] [2020-10-23 17:59:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:59:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:29,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:59:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:29,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:59:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:29,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 17:59:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 17:59:29,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779349966] [2020-10-23 17:59:29,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003112667] [2020-10-23 17:59:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:59:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 17:59:29,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:59:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 17:59:29,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:59:29,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 10 [2020-10-23 17:59:29,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571974325] [2020-10-23 17:59:29,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:59:29,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:59:29,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:59:29,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-23 17:59:29,372 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-23 17:59:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:59:29,389 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-10-23 17:59:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 17:59:29,390 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-23 17:59:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:59:29,390 INFO L225 Difference]: With dead ends: 21 [2020-10-23 17:59:29,391 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 17:59:29,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-23 17:59:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 17:59:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 17:59:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 17:59:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 17:59:29,393 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-23 17:59:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:59:29,394 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 17:59:29,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:59:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 17:59:29,394 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 17:59:29,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 17:59:29,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 17:59:29,775 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 17:59:29,776 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 17:59:29,776 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 17:59:29,776 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 17:59:29,776 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 17:59:29,777 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 17:59:29,777 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 17:59:29,778 INFO L274 CegarLoopResult]: For program point hanoiEXIT(lines 20 25) no Hoare annotation was computed. [2020-10-23 17:59:29,778 INFO L277 CegarLoopResult]: At program point hanoiENTRY(lines 20 25) the Hoare annotation is: true [2020-10-23 17:59:29,791 INFO L274 CegarLoopResult]: For program point hanoiFINAL(lines 20 25) no Hoare annotation was computed. [2020-10-23 17:59:29,792 INFO L277 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: true [2020-10-23 17:59:29,793 INFO L274 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2020-10-23 17:59:29,793 INFO L274 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2020-10-23 17:59:29,793 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 17:59:29,793 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 17:59:29,794 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 17:59:29,794 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 17:59:29,794 INFO L277 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-10-23 17:59:29,794 INFO L274 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-10-23 17:59:29,794 INFO L274 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-10-23 17:59:29,795 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 28 39) the Hoare annotation is: true [2020-10-23 17:59:29,795 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 28 39) no Hoare annotation was computed. [2020-10-23 17:59:29,795 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 28 39) no Hoare annotation was computed. [2020-10-23 17:59:29,795 INFO L270 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: false [2020-10-23 17:59:29,795 INFO L274 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-10-23 17:59:29,796 INFO L274 CegarLoopResult]: For program point L34(lines 34 38) no Hoare annotation was computed. [2020-10-23 17:59:29,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:59:29 BoogieIcfgContainer [2020-10-23 17:59:29,805 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:59:29,812 INFO L168 Benchmark]: Toolchain (without parser) took 2593.39 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 134.1 MB in the beginning and 173.4 MB in the end (delta: -39.3 MB). Peak memory consumption was 84.2 MB. Max. memory is 8.0 GB. [2020-10-23 17:59:29,815 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory was 130.5 MB in the beginning and 130.5 MB in the end (delta: 85.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:59:29,817 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.13 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 124.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 17:59:29,818 INFO L168 Benchmark]: Boogie Preprocessor took 31.36 ms. Allocated memory is still 158.3 MB. Free memory was 124.4 MB in the beginning and 123.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 17:59:29,820 INFO L168 Benchmark]: RCFGBuilder took 345.26 ms. Allocated memory is still 158.3 MB. Free memory was 123.0 MB in the beginning and 109.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 17:59:29,823 INFO L168 Benchmark]: TraceAbstraction took 1950.97 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 109.4 MB in the beginning and 173.4 MB in the end (delta: -64.0 MB). Peak memory consumption was 59.0 MB. Max. memory is 8.0 GB. [2020-10-23 17:59:29,836 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory was 130.5 MB in the beginning and 130.5 MB in the end (delta: 85.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 249.13 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 124.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.36 ms. Allocated memory is still 158.3 MB. Free memory was 124.4 MB in the beginning and 123.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 345.26 ms. Allocated memory is still 158.3 MB. Free memory was 123.0 MB in the beginning and 109.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1950.97 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 109.4 MB in the beginning and 173.4 MB in the end (delta: -64.0 MB). Peak memory consumption was 59.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 17 SDslu, 96 SDs, 0 SdLazy, 66 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 12 PreInvPairs, 12 NumberOfFragments, 39 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 120 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 2895 SizeOfPredicates, 1 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 6/8 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 correct! Received shutdown request...