/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:11:28,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:11:28,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:11:28,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:11:28,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:11:28,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:11:28,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:11:28,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:11:28,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:11:28,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:11:28,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:11:28,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:11:28,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:11:28,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:11:28,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:11:28,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:11:28,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:11:28,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:11:28,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:11:28,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:11:28,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:11:28,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:11:28,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:11:28,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:11:28,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 01:11:28,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 01:11:28,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 01:11:28,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 01:11:28,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 01:11:28,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 01:11:28,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 01:11:28,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 01:11:28,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 01:11:28,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 01:11:28,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 01:11:28,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 01:11:28,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 01:11:28,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 01:11:28,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:11:28,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:11:28,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:11:28,558 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 [2020-07-20 01:11:28,572 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:11:28,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:11:28,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:11:28,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:11:28,574 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:11:28,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:11:28,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:11:28,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:11:28,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:11:28,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:11:28,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:11:28,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:11:28,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:11:28,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:11:28,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:11:28,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:11:28,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:11:28,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:11:28,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:11:28,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:11:28,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:11:28,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:11:28,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:11:28,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:11:28,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:11:28,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:11:28,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:11:28,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:11:28,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:11:28,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:11:28,913 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:11:28,931 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:11:28,935 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:11:28,936 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:11:28,936 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:11:28,937 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-07-20 01:11:29,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95fccd877/dbff905189e2497ba849f36516bf69a9/FLAGff75cc7b1 [2020-07-20 01:11:29,377 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:11:29,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-07-20 01:11:29,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95fccd877/dbff905189e2497ba849f36516bf69a9/FLAGff75cc7b1 [2020-07-20 01:11:29,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95fccd877/dbff905189e2497ba849f36516bf69a9 [2020-07-20 01:11:29,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:11:29,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:11:29,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:11:29,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:11:29,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:11:29,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:29" (1/1) ... [2020-07-20 01:11:29,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@398715d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:29, skipping insertion in model container [2020-07-20 01:11:29,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:29" (1/1) ... [2020-07-20 01:11:29,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:11:29,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:11:29,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:11:29,969 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:11:29,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:11:30,001 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:11:30,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:30 WrapperNode [2020-07-20 01:11:30,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:11:30,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:11:30,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:11:30,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:11:30,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:30" (1/1) ... [2020-07-20 01:11:30,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:30" (1/1) ... [2020-07-20 01:11:30,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:30" (1/1) ... [2020-07-20 01:11:30,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:30" (1/1) ... [2020-07-20 01:11:30,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:30" (1/1) ... [2020-07-20 01:11:30,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:30" (1/1) ... [2020-07-20 01:11:30,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:30" (1/1) ... [2020-07-20 01:11:30,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:11:30,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:11:30,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:11:30,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:11:30,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:30" (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 [2020-07-20 01:11:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:11:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:11:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-20 01:11:30,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:11:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:11:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:11:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-20 01:11:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:11:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:11:30,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:11:30,415 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:11:30,415 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:11:30,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:30 BoogieIcfgContainer [2020-07-20 01:11:30,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:11:30,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:11:30,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:11:30,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:11:30,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:11:29" (1/3) ... [2020-07-20 01:11:30,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c587f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:30, skipping insertion in model container [2020-07-20 01:11:30,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:30" (2/3) ... [2020-07-20 01:11:30,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c587f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:30, skipping insertion in model container [2020-07-20 01:11:30,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:30" (3/3) ... [2020-07-20 01:11:30,429 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-07-20 01:11:30,440 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:11:30,451 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:11:30,467 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:11:30,493 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:11:30,493 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:11:30,493 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:11:30,493 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:11:30,494 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:11:30,494 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:11:30,494 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:11:30,494 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:11:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 01:11:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:11:30,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:30,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:30,520 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-07-20 01:11:30,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:30,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128817784] [2020-07-20 01:11:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d394bd7 [2020-07-20 01:11:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:11:30,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128817784] [2020-07-20 01:11:30,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:11:30,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 01:11:30,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268411429] [2020-07-20 01:11:30,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:11:30,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:30,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:11:30,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:11:30,812 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-07-20 01:11:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:30,964 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-20 01:11:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:11:30,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-20 01:11:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:30,982 INFO L225 Difference]: With dead ends: 33 [2020-07-20 01:11:30,982 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 01:11:30,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:11:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 01:11:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 01:11:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 01:11:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-20 01:11:31,025 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-07-20 01:11:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:31,026 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-20 01:11:31,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:11:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-20 01:11:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:11:31,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:31,028 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:31,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:11:31,030 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:31,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-07-20 01:11:31,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:31,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018753852] [2020-07-20 01:11:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d394bd7 [2020-07-20 01:11:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:11:31,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018753852] [2020-07-20 01:11:31,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121942769] [2020-07-20 01:11:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa59ba5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:31,305 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2aa59ba5 issued 4 check-sat command(s) [2020-07-20 01:11:31,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:31,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 01:11:31,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:11:31,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:31,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 01:11:31,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140469880] [2020-07-20 01:11:31,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 01:11:31,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 01:11:31,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:11:31,535 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 14 states. [2020-07-20 01:11:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:31,709 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-20 01:11:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:11:31,710 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-07-20 01:11:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:31,724 INFO L225 Difference]: With dead ends: 26 [2020-07-20 01:11:31,724 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 01:11:31,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-20 01:11:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 01:11:31,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 01:11:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 01:11:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 01:11:31,732 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-07-20 01:11:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:31,732 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 01:11:31,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 01:11:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 01:11:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 01:11:31,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:31,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:31,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:11:31,948 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:31,949 INFO L82 PathProgramCache]: Analyzing trace with hash 293522751, now seen corresponding path program 2 times [2020-07-20 01:11:31,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:31,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176559354] [2020-07-20 01:11:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d394bd7 [2020-07-20 01:11:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:11:32,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176559354] [2020-07-20 01:11:32,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892831253] [2020-07-20 01:11:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75ec2736 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 [2020-07-20 01:11:32,165 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75ec2736 issued 4 check-sat command(s) [2020-07-20 01:11:32,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 01:11:32,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:11:34,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:34,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 01:11:34,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487776482] [2020-07-20 01:11:34,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 01:11:34,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:34,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 01:11:34,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=263, Unknown=1, NotChecked=0, Total=306 [2020-07-20 01:11:34,456 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 18 states. [2020-07-20 01:11:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:34,729 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-20 01:11:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:11:34,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-07-20 01:11:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:34,732 INFO L225 Difference]: With dead ends: 34 [2020-07-20 01:11:34,732 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 01:11:34,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=85, Invalid=514, Unknown=1, NotChecked=0, Total=600 [2020-07-20 01:11:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 01:11:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 01:11:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 01:11:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-20 01:11:34,740 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2020-07-20 01:11:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:34,740 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-20 01:11:34,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 01:11:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-20 01:11:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 01:11:34,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:34,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:34,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:34,957 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:34,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 3 times [2020-07-20 01:11:34,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:34,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83685466] [2020-07-20 01:11:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d394bd7 [2020-07-20 01:11:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 01:11:35,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83685466] [2020-07-20 01:11:35,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136999593] [2020-07-20 01:11:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48a1387 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:35,406 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48a1387 issued 4 check-sat command(s) [2020-07-20 01:11:35,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 01:11:35,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 01:11:54,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:54,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 01:11:54,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380687771] [2020-07-20 01:11:54,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 01:11:54,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:54,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 01:11:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=571, Unknown=9, NotChecked=0, Total=650 [2020-07-20 01:11:54,912 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 26 states. [2020-07-20 01:12:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:12:01,425 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-07-20 01:12:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:12:01,427 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2020-07-20 01:12:01,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:12:01,428 INFO L225 Difference]: With dead ends: 46 [2020-07-20 01:12:01,429 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 01:12:01,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=181, Invalid=1450, Unknown=9, NotChecked=0, Total=1640 [2020-07-20 01:12:01,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 01:12:01,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 01:12:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 01:12:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-07-20 01:12:01,439 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2020-07-20 01:12:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:12:01,440 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-07-20 01:12:01,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 01:12:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-07-20 01:12:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 01:12:01,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:12:01,442 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:12:01,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:12:01,651 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:12:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:12:01,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1316711615, now seen corresponding path program 4 times [2020-07-20 01:12:01,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:12:01,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605569070] [2020-07-20 01:12:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d394bd7 [2020-07-20 01:12:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:12:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 01:12:02,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605569070] [2020-07-20 01:12:02,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308061905] [2020-07-20 01:12:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4635bec 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 [2020-07-20 01:12:02,446 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4635bec issued 4 check-sat command(s) [2020-07-20 01:12:02,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:12:02,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 01:12:02,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:15:04,885 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-07-20 01:15:04,887 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-07-20 01:15:04,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:15:04,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-20 01:15:04,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685336707] [2020-07-20 01:15:04,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 01:15:04,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:15:04,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 01:15:04,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1241, Unknown=40, NotChecked=0, Total=1406 [2020-07-20 01:15:04,891 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 22 states. [2020-07-20 01:15:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 01:15:05,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:15:05,105 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@d51e5bc at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:672) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:471) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-20 01:15:05,112 INFO L168 Benchmark]: Toolchain (without parser) took 215350.37 ms. Allocated memory was 144.2 MB in the beginning and 274.2 MB in the end (delta: 130.0 MB). Free memory was 102.4 MB in the beginning and 226.7 MB in the end (delta: -124.3 MB). Peak memory consumption was 5.8 MB. Max. memory is 7.1 GB. [2020-07-20 01:15:05,113 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 01:15:05,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.28 ms. Allocated memory is still 144.2 MB. Free memory was 102.0 MB in the beginning and 92.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:15:05,119 INFO L168 Benchmark]: Boogie Preprocessor took 30.68 ms. Allocated memory is still 144.2 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:15:05,122 INFO L168 Benchmark]: RCFGBuilder took 387.06 ms. Allocated memory was 144.2 MB in the beginning and 203.9 MB in the end (delta: 59.8 MB). Free memory was 91.3 MB in the beginning and 171.7 MB in the end (delta: -80.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:15:05,123 INFO L168 Benchmark]: TraceAbstraction took 214686.78 ms. Allocated memory was 203.9 MB in the beginning and 274.2 MB in the end (delta: 70.3 MB). Free memory was 171.0 MB in the beginning and 226.7 MB in the end (delta: -55.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-20 01:15:05,128 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 239.28 ms. Allocated memory is still 144.2 MB. Free memory was 102.0 MB in the beginning and 92.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.68 ms. Allocated memory is still 144.2 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.06 ms. Allocated memory was 144.2 MB in the beginning and 203.9 MB in the end (delta: 59.8 MB). Free memory was 91.3 MB in the beginning and 171.7 MB in the end (delta: -80.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214686.78 ms. Allocated memory was 203.9 MB in the beginning and 274.2 MB in the end (delta: 70.3 MB). Free memory was 171.0 MB in the beginning and 226.7 MB in the end (delta: -55.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@d51e5bc de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@d51e5bc: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...