/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/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:50:56,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:50:56,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:50:56,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:50:56,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:50:56,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:50:56,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:50:56,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:50:56,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:50:56,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:50:56,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:50:56,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:50:56,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:50:56,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:50:56,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:50:56,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:50:56,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:50:56,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:50:56,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:50:56,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:50:56,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:50:56,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:50:56,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:50:56,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:50:56,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:50:56,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:50:56,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:50:56,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:50:56,451 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 01:50:56,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:50:56,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:50:56,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:50:56,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:50:56,468 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:50:56,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:50:56,469 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:50:56,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:50:56,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:50:56,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:50:56,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:50:56,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:50:56,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:50:56,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:50:56,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:50:56,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:50:56,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:50:56,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:50:56,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:50:56,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:50:56,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:50:56,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:50:56,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:50:56,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:50:56,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:50:56,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:50:56,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:50:56,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:50:56,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:50:56,473 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 01:50:56,761 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:50:56,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:50:56,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:50:56,780 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:50:56,780 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:50:56,781 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-20 01:50:56,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66cb20932/6cd6ef5d1efc457ca7e619b494daf5b6/FLAG544eee39e [2020-07-20 01:50:57,347 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:50:57,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-20 01:50:57,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66cb20932/6cd6ef5d1efc457ca7e619b494daf5b6/FLAG544eee39e [2020-07-20 01:50:57,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66cb20932/6cd6ef5d1efc457ca7e619b494daf5b6 [2020-07-20 01:50:57,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:50:57,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:50:57,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:50:57,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:50:57,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:50:57,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:57" (1/1) ... [2020-07-20 01:50:57,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a050170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57, skipping insertion in model container [2020-07-20 01:50:57,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:57" (1/1) ... [2020-07-20 01:50:57,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:50:57,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:50:57,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:50:57,914 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:50:57,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:50:57,945 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:50:57,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57 WrapperNode [2020-07-20 01:50:57,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:50:57,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:50:57,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:50:57,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:50:57,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57" (1/1) ... [2020-07-20 01:50:57,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57" (1/1) ... [2020-07-20 01:50:57,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57" (1/1) ... [2020-07-20 01:50:57,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57" (1/1) ... [2020-07-20 01:50:57,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57" (1/1) ... [2020-07-20 01:50:57,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57" (1/1) ... [2020-07-20 01:50:57,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57" (1/1) ... [2020-07-20 01:50:58,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:50:58,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:50:58,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:50:58,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:50:58,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57" (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 01:50:58,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:50:58,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:50:58,133 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:50:58,133 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:50:58,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:50:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:50:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:50:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:50:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:50:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:50:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:50:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:50:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:50:58,427 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:50:58,428 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 01:50:58,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:58 BoogieIcfgContainer [2020-07-20 01:50:58,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:50:58,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:50:58,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:50:58,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:50:58,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:50:57" (1/3) ... [2020-07-20 01:50:58,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb94739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:58, skipping insertion in model container [2020-07-20 01:50:58,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:57" (2/3) ... [2020-07-20 01:50:58,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb94739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:58, skipping insertion in model container [2020-07-20 01:50:58,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:58" (3/3) ... [2020-07-20 01:50:58,463 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-07-20 01:50:58,477 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:50:58,488 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:50:58,499 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:50:58,520 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:50:58,520 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:50:58,521 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:50:58,521 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:50:58,521 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:50:58,521 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:50:58,521 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:50:58,521 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:50:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 01:50:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 01:50:58,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:58,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:58,547 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:58,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:58,553 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-07-20 01:50:58,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:58,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96886473] [2020-07-20 01:50:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 01:50:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:58,753 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 01:50:58,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96886473] [2020-07-20 01:50:58,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:50:58,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:50:58,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563047410] [2020-07-20 01:50:58,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:50:58,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:58,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:50:58,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:50:58,781 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-20 01:50:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:50:58,910 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-07-20 01:50:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:50:58,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 01:50:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:50:58,929 INFO L225 Difference]: With dead ends: 57 [2020-07-20 01:50:58,930 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 01:50:58,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:50:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 01:50:58,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 01:50:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 01:50:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 01:50:58,975 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-20 01:50:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:50:58,976 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 01:50:58,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:50:58,977 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 01:50:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 01:50:58,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:58,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:58,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:50:58,980 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:58,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:58,980 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-07-20 01:50:58,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:58,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249310570] [2020-07-20 01:50:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 01:50:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,078 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 01:50:59,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249310570] [2020-07-20 01:50:59,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:50:59,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 01:50:59,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037878569] [2020-07-20 01:50:59,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:50:59,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:59,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:50:59,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:50:59,091 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-20 01:50:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:50:59,263 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-20 01:50:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:50:59,264 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 01:50:59,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:50:59,265 INFO L225 Difference]: With dead ends: 40 [2020-07-20 01:50:59,266 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 01:50:59,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:50:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 01:50:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-07-20 01:50:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 01:50:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 01:50:59,276 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2020-07-20 01:50:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:50:59,277 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 01:50:59,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:50:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 01:50:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:50:59,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:59,278 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:59,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:50:59,279 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:59,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:59,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-07-20 01:50:59,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:59,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499534192] [2020-07-20 01:50:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 01:50:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:50:59,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499534192] [2020-07-20 01:50:59,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:50:59,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:50:59,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693965220] [2020-07-20 01:50:59,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:50:59,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:59,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:50:59,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:50:59,410 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-07-20 01:50:59,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:50:59,507 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-07-20 01:50:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:50:59,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 01:50:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:50:59,510 INFO L225 Difference]: With dead ends: 45 [2020-07-20 01:50:59,510 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 01:50:59,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:50:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 01:50:59,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 01:50:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 01:50:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-20 01:50:59,535 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2020-07-20 01:50:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:50:59,535 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-20 01:50:59,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:50:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-20 01:50:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 01:50:59,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:59,537 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:59,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 01:50:59,537 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:59,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-07-20 01:50:59,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:59,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538605017] [2020-07-20 01:50:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 01:50:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:50:59,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538605017] [2020-07-20 01:50:59,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:50:59,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:50:59,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473353415] [2020-07-20 01:50:59,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:50:59,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:59,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:50:59,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:50:59,607 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2020-07-20 01:50:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:50:59,728 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2020-07-20 01:50:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:50:59,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-20 01:50:59,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:50:59,730 INFO L225 Difference]: With dead ends: 97 [2020-07-20 01:50:59,731 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 01:50:59,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:50:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 01:50:59,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-07-20 01:50:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 01:50:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-07-20 01:50:59,746 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2020-07-20 01:50:59,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:50:59,746 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-07-20 01:50:59,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:50:59,746 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-07-20 01:50:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 01:50:59,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:50:59,748 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:50:59,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 01:50:59,748 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:50:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:50:59,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-07-20 01:50:59,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:50:59,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318117151] [2020-07-20 01:50:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 01:50:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:50:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 01:50:59,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318117151] [2020-07-20 01:50:59,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731216773] [2020-07-20 01:50:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@361cf120 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 01:50:59,906 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@361cf120 issued 2 check-sat command(s) [2020-07-20 01:50:59,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:50:59,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 01:50:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:50:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:50:59,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:50:59,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-20 01:50:59,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368803250] [2020-07-20 01:50:59,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:50:59,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:50:59,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:50:59,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:50:59,940 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 6 states. [2020-07-20 01:51:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:00,010 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-07-20 01:51:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:51:00,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-07-20 01:51:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:00,012 INFO L225 Difference]: With dead ends: 80 [2020-07-20 01:51:00,012 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 01:51:00,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:51:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 01:51:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-20 01:51:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:51:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-07-20 01:51:00,025 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 31 [2020-07-20 01:51:00,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:00,025 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-07-20 01:51:00,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:51:00,026 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-07-20 01:51:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 01:51:00,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:00,027 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:00,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:00,232 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:00,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:00,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2099424040, now seen corresponding path program 1 times [2020-07-20 01:51:00,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:00,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618621624] [2020-07-20 01:51:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 01:51:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 01:51:00,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618621624] [2020-07-20 01:51:00,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263021801] [2020-07-20 01:51:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58f4c6ed No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:00,370 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58f4c6ed issued 2 check-sat command(s) [2020-07-20 01:51:00,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 01:51:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:51:00,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:00,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 01:51:00,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897413257] [2020-07-20 01:51:00,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 01:51:00,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:00,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 01:51:00,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:51:00,507 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 14 states. [2020-07-20 01:51:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:01,210 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2020-07-20 01:51:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 01:51:01,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-07-20 01:51:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:01,213 INFO L225 Difference]: With dead ends: 167 [2020-07-20 01:51:01,214 INFO L226 Difference]: Without dead ends: 105 [2020-07-20 01:51:01,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-07-20 01:51:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-20 01:51:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 57. [2020-07-20 01:51:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:51:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-07-20 01:51:01,233 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 34 [2020-07-20 01:51:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:01,234 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-07-20 01:51:01,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 01:51:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-07-20 01:51:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 01:51:01,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:01,235 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:01,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:01,449 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1702845076, now seen corresponding path program 2 times [2020-07-20 01:51:01,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:01,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423840869] [2020-07-20 01:51:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74a86c52 [2020-07-20 01:51:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 01:51:01,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423840869] [2020-07-20 01:51:01,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:51:01,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 01:51:01,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754055803] [2020-07-20 01:51:01,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:51:01,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:01,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:51:01,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:51:01,611 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 6 states. [2020-07-20 01:51:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:01,700 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-07-20 01:51:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:51:01,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-20 01:51:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:01,701 INFO L225 Difference]: With dead ends: 57 [2020-07-20 01:51:01,702 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:51:01,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:51:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:51:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:51:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:51:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:51:01,707 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-07-20 01:51:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:01,707 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:51:01,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:51:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:51:01,708 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:51:01,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 01:51:01,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:51:02,264 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 01:51:02,264 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:51:02,265 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:51:02,265 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:51:02,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:51:02,265 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:51:02,265 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 01:51:02,265 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 01:51:02,266 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 01:51:02,266 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 01:51:02,266 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-07-20 01:51:02,266 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-07-20 01:51:02,266 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (let ((.cse1 (<= main_~n~0 main_~k~0)) (.cse2 (<= .cse0 main_~j~0))) (or (and (<= main_~k~0 (+ .cse0 1)) (<= main_~k~0 main_~j~0) .cse1 .cse2) (and (<= main_~k~0 main_~n~0) .cse1 .cse2) (and (<= (+ (div (+ (* main_~n~0 (- 1)) 1) (- 2)) 1) (div main_~j~0 2)) (<= main_~j~0 .cse0) .cse1 .cse2)))) [2020-07-20 01:51:02,267 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-07-20 01:51:02,267 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= (+ main_~j~0 1) main_~n~0) (<= .cse0 main_~k~0) (<= main_~k~0 main_~n~0) (<= .cse0 main_~j~0))) [2020-07-20 01:51:02,267 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-20 01:51:02,267 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-07-20 01:51:02,267 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-20 01:51:02,268 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-07-20 01:51:02,268 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-20 01:51:02,268 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= (+ main_~j~0 1) main_~n~0) (<= (+ main_~k~0 1) main_~n~0) (<= .cse0 main_~k~0) (<= .cse0 main_~j~0))) [2020-07-20 01:51:02,268 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-07-20 01:51:02,269 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-07-20 01:51:02,269 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0)) (.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= main_~n~0 main_~j~0))) (or (and (or (and (<= main_~i~0 0) .cse0) (and .cse0 .cse1)) (<= main_~k~0 main_~n~0)) (and (<= main_~k~0 .cse2) .cse0 .cse1) (and (<= (+ (div (+ (* main_~n~0 (- 1)) 1) (- 2)) 1) main_~i~0) (<= main_~j~0 .cse2) .cse0 .cse1))) [2020-07-20 01:51:02,269 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-07-20 01:51:02,269 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-07-20 01:51:02,270 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-07-20 01:51:02,270 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 01:51:02,270 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 01:51:02,270 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 01:51:02,270 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 01:51:02,271 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 01:51:02,271 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 01:51:02,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:51:02 BoogieIcfgContainer [2020-07-20 01:51:02,298 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:51:02,302 INFO L168 Benchmark]: Toolchain (without parser) took 4576.49 ms. Allocated memory was 137.9 MB in the beginning and 246.9 MB in the end (delta: 109.1 MB). Free memory was 102.5 MB in the beginning and 114.3 MB in the end (delta: -11.8 MB). Peak memory consumption was 97.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:51:02,303 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 01:51:02,304 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.98 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:51:02,305 INFO L168 Benchmark]: Boogie Preprocessor took 121.56 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.7 MB in the beginning and 180.7 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:51:02,306 INFO L168 Benchmark]: RCFGBuilder took 363.84 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 165.8 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:51:02,307 INFO L168 Benchmark]: TraceAbstraction took 3857.43 ms. Allocated memory was 201.9 MB in the beginning and 246.9 MB in the end (delta: 45.1 MB). Free memory was 165.8 MB in the beginning and 114.3 MB in the end (delta: 51.4 MB). Peak memory consumption was 96.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:51:02,312 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 137.9 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 219.98 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.56 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.7 MB in the beginning and 180.7 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 363.84 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 165.8 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3857.43 ms. Allocated memory was 201.9 MB in the beginning and 246.9 MB in the end (delta: 45.1 MB). Free memory was 165.8 MB in the beginning and 114.3 MB in the end (delta: 51.4 MB). Peak memory consumption was 96.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((j + 1 <= n && 2 * i <= k) && k <= n) && 2 * i <= j - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((i <= 0 && n <= k) || (n <= k && n <= j)) && k <= n) || ((k <= 2 * i && n <= k) && n <= j)) || ((((n * -1 + 1) / -2 + 1 <= i && j <= 2 * i) && n <= k) && n <= j) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((k <= 2 * i + 1 && k <= j) && n <= k) && 2 * i <= j) || ((k <= n && n <= k) && 2 * i <= j)) || ((((n * -1 + 1) / -2 + 1 <= j / 2 && j <= 2 * i) && n <= k) && 2 * i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.1s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 191 SDtfs, 134 SDslu, 523 SDs, 0 SdLazy, 532 SolverSat, 98 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 74 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 35 PreInvPairs, 68 NumberOfFragments, 194 HoareAnnotationTreeSize, 35 FomulaSimplifications, 3095 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 12 FomulaSimplificationsInter, 525 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 243 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 12966 SizeOfPredicates, 8 NumberOfNonLiveVariables, 97 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 72/81 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...