/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-simple/id_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:16:36,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:16:36,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:16:36,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:16:36,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:16:36,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:16:36,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:16:36,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:16:36,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:16:36,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:16:36,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:16:36,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:16:36,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:16:36,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:16:36,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:16:36,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:16:36,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:16:36,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:16:36,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:16:36,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:16:36,818 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 18:16:36,845 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:16:36,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:16:36,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:16:36,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:16:36,848 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:16:36,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:16:36,849 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:16:36,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:16:36,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:16:36,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:16:36,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:16:36,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:16:36,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:16:36,851 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:16:36,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:16:36,851 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:16:36,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:16:36,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:16:36,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:16:36,853 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:16:36,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:16:36,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:16:36,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:16:36,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:16:36,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:16:36,855 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:16:36,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:16:36,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:16:36,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:16:36,856 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:16:37,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:16:37,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:16:37,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:16:37,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:16:37,390 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:16:37,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-10-23 18:16:37,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dba944bdc/08fd8120a9304478be373c00478155e0/FLAGceb3bd24c [2020-10-23 18:16:38,070 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:16:38,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-10-23 18:16:38,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dba944bdc/08fd8120a9304478be373c00478155e0/FLAGceb3bd24c [2020-10-23 18:16:38,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dba944bdc/08fd8120a9304478be373c00478155e0 [2020-10-23 18:16:38,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:16:38,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:16:38,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:16:38,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:16:38,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:16:38,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:16:38" (1/1) ... [2020-10-23 18:16:38,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67c2440b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38, skipping insertion in model container [2020-10-23 18:16:38,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:16:38" (1/1) ... [2020-10-23 18:16:38,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:16:38,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:16:38,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:16:38,752 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:16:38,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:16:38,785 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:16:38,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38 WrapperNode [2020-10-23 18:16:38,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:16:38,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:16:38,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:16:38,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:16:38,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38" (1/1) ... [2020-10-23 18:16:38,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38" (1/1) ... [2020-10-23 18:16:38,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38" (1/1) ... [2020-10-23 18:16:38,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38" (1/1) ... [2020-10-23 18:16:38,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38" (1/1) ... [2020-10-23 18:16:38,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38" (1/1) ... [2020-10-23 18:16:38,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38" (1/1) ... [2020-10-23 18:16:38,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:16:38,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:16:38,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:16:38,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:16:38,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38" (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 [2020-10-23 18:16:38,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:16:38,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:16:38,934 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:16:38,934 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 18:16:38,934 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:16:38,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:16:38,935 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:16:38,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:16:38,935 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:16:38,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:16:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 18:16:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:16:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:16:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:16:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:16:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:16:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:16:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:16:39,391 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:16:39,391 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:16:39,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:16:39 BoogieIcfgContainer [2020-10-23 18:16:39,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:16:39,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:16:39,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:16:39,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:16:39,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:16:38" (1/3) ... [2020-10-23 18:16:39,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b276b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:16:39, skipping insertion in model container [2020-10-23 18:16:39,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:38" (2/3) ... [2020-10-23 18:16:39,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b276b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:16:39, skipping insertion in model container [2020-10-23 18:16:39,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:16:39" (3/3) ... [2020-10-23 18:16:39,409 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-10-23 18:16:39,423 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:16:39,428 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:16:39,444 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:16:39,489 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:16:39,489 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:16:39,490 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:16:39,490 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:16:39,490 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:16:39,490 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:16:39,491 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:16:39,491 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:16:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:16:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:16:39,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:39,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:39,532 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:39,542 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-10-23 18:16:39,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:39,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621340859] [2020-10-23 18:16:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,897 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 18:16:39,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621340859] [2020-10-23 18:16:39,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:16:39,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:16:39,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938722861] [2020-10-23 18:16:39,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:16:39,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:39,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:16:39,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:16:39,923 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:16:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:40,182 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-23 18:16:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:16:40,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:16:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:40,194 INFO L225 Difference]: With dead ends: 38 [2020-10-23 18:16:40,194 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:16:40,198 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 18:16:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:16:40,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:16:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:16:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:16:40,245 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:16:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:40,246 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:16:40,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:16:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:16:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:16:40,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:40,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:40,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:16:40,249 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-10-23 18:16:40,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:40,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232286150] [2020-10-23 18:16:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,521 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 18:16:40,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232286150] [2020-10-23 18:16:40,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787205692] [2020-10-23 18:16:40,527 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 18:16:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:16:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:40,703 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 18:16:40,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:40,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-10-23 18:16:40,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456075387] [2020-10-23 18:16:40,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:16:40,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:40,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:16:40,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:16:40,707 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-23 18:16:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:40,934 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:16:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:16:40,935 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-23 18:16:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:40,936 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:16:40,937 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:16:40,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:16:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:16:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:16:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:16:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:16:40,947 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:16:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:40,947 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:16:40,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:16:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:16:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:16:40,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:40,949 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:41,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:16:41,164 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:41,166 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-10-23 18:16:41,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:41,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742667914] [2020-10-23 18:16:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:16:41,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742667914] [2020-10-23 18:16:41,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112239455] [2020-10-23 18:16:41,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:41,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:16:41,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:16:41,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:16:41,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:41,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-10-23 18:16:41,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599579078] [2020-10-23 18:16:41,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:16:41,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:16:41,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:16:41,529 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 15 states. [2020-10-23 18:16:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:42,028 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:16:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:16:42,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-23 18:16:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:42,030 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:16:42,030 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:16:42,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:16:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:16:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:16:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:16:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:16:42,047 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:16:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:42,047 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:16:42,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:16:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:16:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:16:42,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:42,050 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:42,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:42,265 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:42,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:42,267 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-10-23 18:16:42,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:42,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482288134] [2020-10-23 18:16:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:16:42,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482288134] [2020-10-23 18:16:42,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728158608] [2020-10-23 18:16:42,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:42,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:16:42,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:16:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:16:42,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:42,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2020-10-23 18:16:42,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394850034] [2020-10-23 18:16:42,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:16:42,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:42,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:16:42,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:16:42,671 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 18 states. [2020-10-23 18:16:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:43,324 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:16:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:16:43,325 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-23 18:16:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:43,326 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:16:43,327 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:16:43,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:16:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:16:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:16:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:16:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:16:43,335 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:16:43,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:43,336 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:16:43,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:16:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:16:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:16:43,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:43,338 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:43,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:43,551 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:43,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-10-23 18:16:43,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:43,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230826753] [2020-10-23 18:16:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:16:43,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230826753] [2020-10-23 18:16:43,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362504571] [2020-10-23 18:16:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:43,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:16:43,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:43,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:16:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:16:43,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:43,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-10-23 18:16:43,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322214487] [2020-10-23 18:16:43,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:16:43,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:43,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:16:43,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:16:43,959 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2020-10-23 18:16:44,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:44,322 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:16:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:16:44,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-23 18:16:44,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:44,324 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:16:44,325 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:16:44,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:16:44,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:16:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:16:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:16:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:16:44,334 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:16:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:44,334 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:16:44,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:16:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:16:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:16:44,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:44,336 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:44,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:44,551 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-10-23 18:16:44,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:44,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797125369] [2020-10-23 18:16:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:16:44,571 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:16:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:16:44,591 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:16:44,620 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:16:44,620 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:16:44,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:16:44,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:16:44 BoogieIcfgContainer [2020-10-23 18:16:44,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:16:44,662 INFO L168 Benchmark]: Toolchain (without parser) took 6173.83 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 129.7 MB in the beginning and 106.4 MB in the end (delta: 23.3 MB). Peak memory consumption was 57.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:44,663 INFO L168 Benchmark]: CDTParser took 1.43 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 100.9 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:16:44,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.10 ms. Allocated memory is still 154.1 MB. Free memory was 129.2 MB in the beginning and 120.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:44,664 INFO L168 Benchmark]: Boogie Preprocessor took 54.63 ms. Allocated memory is still 154.1 MB. Free memory was 120.2 MB in the beginning and 118.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:44,665 INFO L168 Benchmark]: RCFGBuilder took 551.11 ms. Allocated memory is still 154.1 MB. Free memory was 118.8 MB in the beginning and 136.4 MB in the end (delta: -17.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:44,666 INFO L168 Benchmark]: TraceAbstraction took 5261.05 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 136.1 MB in the beginning and 106.4 MB in the end (delta: 29.6 MB). Peak memory consumption was 62.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:44,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.43 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 100.9 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.10 ms. Allocated memory is still 154.1 MB. Free memory was 129.2 MB in the beginning and 120.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.63 ms. Allocated memory is still 154.1 MB. Free memory was 120.2 MB in the beginning and 118.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 551.11 ms. Allocated memory is still 154.1 MB. Free memory was 118.8 MB in the beginning and 136.4 MB in the end (delta: -17.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5261.05 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 136.1 MB in the beginning and 106.4 MB in the end (delta: 29.6 MB). Peak memory consumption was 62.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 5; VAL [input=5] [L13] CALL, EXPR id(input) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=5, input=5] [L13] int result = id(input); [L14] COND TRUE result == 5 VAL [input=5, result=5] [L15] CALL reach_error() [L4] __assert_fail("0", "id_i5_o5-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 116 SDslu, 178 SDs, 0 SdLazy, 395 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 221 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=5, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 300 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 246 ConstructedInterpolants, 0 QuantifiedInterpolants, 18960 SizeOfPredicates, 11 NumberOfNonLiveVariables, 483 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 100/200 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...