/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:44:54,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:44:54,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:44:54,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:44:54,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:44:54,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:44:54,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:44:54,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:44:54,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:44:54,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:44:54,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:44:54,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:44:54,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:44:54,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:44:54,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:44:54,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:44:54,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:44:54,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:44:54,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:44:54,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:44:54,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:44:54,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:44:54,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:44:54,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:44:54,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:44:54,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:44:54,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:44:54,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:44:54,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:44:54,505 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:44:54,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:44:54,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:44:54,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:44:54,507 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:44:54,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:44:54,508 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:44:54,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:44:54,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:44:54,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:44:54,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:44:54,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:44:54,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:44:54,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:44:54,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:44:54,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:44:54,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:44:54,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:44:54,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:44:54,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:44:54,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:44:54,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:44:54,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:44:54,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:44:54,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:44:54,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:44:54,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:44:54,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:44:54,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:44:54,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:44:54,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:44:54,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:44:54,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:44:54,993 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:44:54,994 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:44:54,995 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-09-04 13:44:55,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b5e270c6/de84771ecf0842f19e117745b0826665/FLAG18b0afa3a [2020-09-04 13:44:55,658 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:44:55,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-09-04 13:44:55,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b5e270c6/de84771ecf0842f19e117745b0826665/FLAG18b0afa3a [2020-09-04 13:44:55,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b5e270c6/de84771ecf0842f19e117745b0826665 [2020-09-04 13:44:56,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:44:56,004 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:44:56,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:44:56,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:44:56,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:44:56,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:44:55" (1/1) ... [2020-09-04 13:44:56,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56, skipping insertion in model container [2020-09-04 13:44:56,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:44:55" (1/1) ... [2020-09-04 13:44:56,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:44:56,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:44:56,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:44:56,267 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:44:56,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:44:56,306 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:44:56,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56 WrapperNode [2020-09-04 13:44:56,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:44:56,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:44:56,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:44:56,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:44:56,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56" (1/1) ... [2020-09-04 13:44:56,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56" (1/1) ... [2020-09-04 13:44:56,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56" (1/1) ... [2020-09-04 13:44:56,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56" (1/1) ... [2020-09-04 13:44:56,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56" (1/1) ... [2020-09-04 13:44:56,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56" (1/1) ... [2020-09-04 13:44:56,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56" (1/1) ... [2020-09-04 13:44:56,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:44:56,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:44:56,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:44:56,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:44:56,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:44:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:44:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:44:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:44:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:44:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:44:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:44:56,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:44:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:44:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:44:56,773 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:44:56,773 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-04 13:44:56,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:44:56 BoogieIcfgContainer [2020-09-04 13:44:56,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:44:56,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:44:56,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:44:56,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:44:56,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:44:55" (1/3) ... [2020-09-04 13:44:56,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c145fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:44:56, skipping insertion in model container [2020-09-04 13:44:56,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:56" (2/3) ... [2020-09-04 13:44:56,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c145fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:44:56, skipping insertion in model container [2020-09-04 13:44:56,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:44:56" (3/3) ... [2020-09-04 13:44:56,788 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-09-04 13:44:56,803 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:44:56,815 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:44:56,845 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:44:56,881 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:44:56,881 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:44:56,882 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:44:56,882 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:44:56,882 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:44:56,882 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:44:56,882 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:44:56,883 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:44:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-04 13:44:56,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:44:56,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:56,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:56,918 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:56,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2037426592, now seen corresponding path program 1 times [2020-09-04 13:44:56,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:56,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16805320] [2020-09-04 13:44:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:57,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:57,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16805320] [2020-09-04 13:44:57,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:57,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 13:44:57,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86749105] [2020-09-04 13:44:57,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 13:44:57,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:57,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 13:44:57,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 13:44:57,139 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-04 13:44:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:57,171 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2020-09-04 13:44:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 13:44:57,173 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-04 13:44:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:57,184 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:44:57,185 INFO L226 Difference]: Without dead ends: 22 [2020-09-04 13:44:57,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 13:44:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-04 13:44:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-04 13:44:57,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-04 13:44:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-09-04 13:44:57,240 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-09-04 13:44:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:57,241 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-09-04 13:44:57,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 13:44:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-09-04 13:44:57,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:44:57,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:57,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:57,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:44:57,243 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2031885466, now seen corresponding path program 1 times [2020-09-04 13:44:57,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:57,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882402607] [2020-09-04 13:44:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:57,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:57,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882402607] [2020-09-04 13:44:57,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:57,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:44:57,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577947001] [2020-09-04 13:44:57,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:44:57,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:57,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:44:57,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:44:57,371 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-09-04 13:44:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:57,406 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-09-04 13:44:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:44:57,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-09-04 13:44:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:57,408 INFO L225 Difference]: With dead ends: 48 [2020-09-04 13:44:57,409 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 13:44:57,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:44:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 13:44:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-09-04 13:44:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-04 13:44:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-09-04 13:44:57,420 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-09-04 13:44:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:57,420 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-09-04 13:44:57,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:44:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-09-04 13:44:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 13:44:57,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:57,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:57,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:44:57,423 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:57,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:57,423 INFO L82 PathProgramCache]: Analyzing trace with hash -935219944, now seen corresponding path program 1 times [2020-09-04 13:44:57,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:57,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721651495] [2020-09-04 13:44:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:57,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:57,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721651495] [2020-09-04 13:44:57,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861291403] [2020-09-04 13:44:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:44:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:57,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-04 13:44:57,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:44:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:57,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:44:57,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-09-04 13:44:57,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971628692] [2020-09-04 13:44:57,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:44:57,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:44:57,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:44:57,702 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-09-04 13:44:57,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:57,746 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-09-04 13:44:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:44:57,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-04 13:44:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:57,748 INFO L225 Difference]: With dead ends: 51 [2020-09-04 13:44:57,748 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 13:44:57,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:44:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 13:44:57,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-09-04 13:44:57,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 13:44:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-09-04 13:44:57,756 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-09-04 13:44:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:57,756 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-09-04 13:44:57,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:44:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-09-04 13:44:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 13:44:57,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:57,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:57,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:44:57,968 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:57,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:57,969 INFO L82 PathProgramCache]: Analyzing trace with hash -465234410, now seen corresponding path program 2 times [2020-09-04 13:44:57,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:57,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223346135] [2020-09-04 13:44:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:58,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:58,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223346135] [2020-09-04 13:44:58,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126169658] [2020-09-04 13:44:58,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:44:58,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:44:58,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:44:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-04 13:44:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:44:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:58,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:44:58,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-04 13:44:58,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144535721] [2020-09-04 13:44:58,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:44:58,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:58,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:44:58,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:44:58,197 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-09-04 13:44:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:58,249 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-09-04 13:44:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:44:58,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-04 13:44:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:58,251 INFO L225 Difference]: With dead ends: 55 [2020-09-04 13:44:58,251 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 13:44:58,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:44:58,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 13:44:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-09-04 13:44:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:44:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-09-04 13:44:58,259 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-09-04 13:44:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:58,259 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-09-04 13:44:58,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:44:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-09-04 13:44:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 13:44:58,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:58,261 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:58,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:44:58,476 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash 219297684, now seen corresponding path program 3 times [2020-09-04 13:44:58,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:58,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601567013] [2020-09-04 13:44:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:58,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:58,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601567013] [2020-09-04 13:44:58,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797025739] [2020-09-04 13:44:58,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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