/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:10:47,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:10:47,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:10:47,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:10:47,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:10:47,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:10:47,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:10:47,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:10:47,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:10:47,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:10:47,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:10:47,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:10:47,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:10:47,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:10:47,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:10:47,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:10:47,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:10:47,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:10:47,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:10:47,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:10:47,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:10:47,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:10:47,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:10:47,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:10:47,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:10:47,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:10:47,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:10:47,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:10:47,634 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 [2020-07-21 23:10:47,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:10:47,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:10:47,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:10:47,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:10:47,677 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:10:47,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:10:47,677 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:10:47,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:10:47,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:10:47,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:10:47,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:10:47,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:10:47,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:10:47,681 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:10:47,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:10:47,681 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:10:47,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:10:47,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:10:47,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:10:47,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:10:47,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:10:47,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:10:47,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:10:47,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:10:47,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:10:47,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:10:47,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:47,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:10:47,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:10:47,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 23:10:48,041 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:10:48,063 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:10:48,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:10:48,068 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:10:48,068 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:10:48,070 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-21 23:10:48,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42001cdc3/7522cf49de504911ab0bf93a33d1fab0/FLAG6d150229b [2020-07-21 23:10:48,631 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:10:48,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-21 23:10:48,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42001cdc3/7522cf49de504911ab0bf93a33d1fab0/FLAG6d150229b [2020-07-21 23:10:48,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42001cdc3/7522cf49de504911ab0bf93a33d1fab0 [2020-07-21 23:10:49,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:10:49,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:10:49,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:10:49,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:10:49,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:10:49,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:10:48" (1/1) ... [2020-07-21 23:10:49,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ecad081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49, skipping insertion in model container [2020-07-21 23:10:49,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:10:48" (1/1) ... [2020-07-21 23:10:49,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:10:49,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:10:49,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:10:49,251 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:10:49,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:10:49,423 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:10:49,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49 WrapperNode [2020-07-21 23:10:49,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:10:49,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:10:49,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:10:49,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:10:49,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49" (1/1) ... [2020-07-21 23:10:49,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49" (1/1) ... [2020-07-21 23:10:49,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49" (1/1) ... [2020-07-21 23:10:49,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49" (1/1) ... [2020-07-21 23:10:49,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49" (1/1) ... [2020-07-21 23:10:49,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49" (1/1) ... [2020-07-21 23:10:49,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49" (1/1) ... [2020-07-21 23:10:49,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:10:49,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:10:49,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:10:49,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:10:49,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49" (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 [2020-07-21 23:10:49,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:10:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:10:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:10:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-21 23:10:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:10:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-21 23:10:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:10:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:10:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-21 23:10:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-21 23:10:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:10:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 23:10:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 23:10:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 23:10:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 23:10:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:10:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:10:50,030 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:10:50,030 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-21 23:10:50,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:10:50 BoogieIcfgContainer [2020-07-21 23:10:50,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:10:50,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:10:50,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:10:50,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:10:50,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:10:48" (1/3) ... [2020-07-21 23:10:50,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e06c752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:10:50, skipping insertion in model container [2020-07-21 23:10:50,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:49" (2/3) ... [2020-07-21 23:10:50,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e06c752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:10:50, skipping insertion in model container [2020-07-21 23:10:50,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:10:50" (3/3) ... [2020-07-21 23:10:50,044 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-21 23:10:50,070 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:10:50,080 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:10:50,093 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:10:50,121 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:10:50,122 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:10:50,122 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:10:50,122 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:10:50,123 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:10:50,123 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:10:50,123 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:10:50,123 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:10:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-21 23:10:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 23:10:50,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:50,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:50,156 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:50,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:50,163 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-21 23:10:50,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:50,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705932514] [2020-07-21 23:10:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:50,359 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:10:50,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:50,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:10:50,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:50,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:10:50,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705932514] [2020-07-21 23:10:50,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:10:50,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:10:50,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930036459] [2020-07-21 23:10:50,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:10:50,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:50,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:10:50,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:10:50,434 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2020-07-21 23:10:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:50,504 INFO L93 Difference]: Finished difference Result 122 states and 178 transitions. [2020-07-21 23:10:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:10:50,505 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 23:10:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:50,520 INFO L225 Difference]: With dead ends: 122 [2020-07-21 23:10:50,521 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 23:10:50,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:10:50,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 23:10:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 23:10:50,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 23:10:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-21 23:10:50,575 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-07-21 23:10:50,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:50,575 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-21 23:10:50,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:10:50,576 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-21 23:10:50,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 23:10:50,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:50,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:50,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:50,779 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:50,780 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-07-21 23:10:50,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:50,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683304449] [2020-07-21 23:10:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:50,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:10:50,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:10:50,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:50,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:10:50,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683304449] [2020-07-21 23:10:50,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:10:50,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:10:50,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246021427] [2020-07-21 23:10:50,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:10:50,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:50,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:10:50,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:10:50,918 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-07-21 23:10:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:50,988 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-07-21 23:10:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:10:50,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-21 23:10:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:50,990 INFO L225 Difference]: With dead ends: 38 [2020-07-21 23:10:50,991 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 23:10:50,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:10:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 23:10:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-07-21 23:10:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 23:10:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-21 23:10:51,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-07-21 23:10:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:51,009 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-21 23:10:51,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:10:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-21 23:10:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:10:51,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:51,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:51,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:51,230 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:51,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-07-21 23:10:51,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:51,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047274963] [2020-07-21 23:10:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:51,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:10:51,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:10:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:51,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:51,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047274963] [2020-07-21 23:10:51,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:51,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 23:10:51,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429051687] [2020-07-21 23:10:51,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:10:51,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:51,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:10:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:10:51,439 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-07-21 23:10:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:51,522 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-21 23:10:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:10:51,523 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-07-21 23:10:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:51,524 INFO L225 Difference]: With dead ends: 48 [2020-07-21 23:10:51,524 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 23:10:51,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:10:51,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 23:10:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 23:10:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 23:10:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-21 23:10:51,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-07-21 23:10:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:51,533 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-21 23:10:51,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:10:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-21 23:10:51,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 23:10:51,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:51,534 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:51,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:51,736 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1296658810, now seen corresponding path program 2 times [2020-07-21 23:10:51,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:51,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022987222] [2020-07-21 23:10:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:51,791 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:10:51,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:51,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:10:51,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 23:10:51,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:10:51,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022987222] [2020-07-21 23:10:51,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:10:51,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:10:51,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047388243] [2020-07-21 23:10:51,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:10:51,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:51,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:10:51,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:10:51,818 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 4 states. [2020-07-21 23:10:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:51,858 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-07-21 23:10:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:10:51,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-07-21 23:10:51,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:51,862 INFO L225 Difference]: With dead ends: 87 [2020-07-21 23:10:51,862 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 23:10:51,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:10:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 23:10:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2020-07-21 23:10:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 23:10:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-21 23:10:51,876 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 28 [2020-07-21 23:10:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:51,877 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-21 23:10:51,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:10:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-21 23:10:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 23:10:51,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:51,878 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:52,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:52,093 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:52,094 INFO L82 PathProgramCache]: Analyzing trace with hash -479010360, now seen corresponding path program 1 times [2020-07-21 23:10:52,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:52,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932592268] [2020-07-21 23:10:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:52,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:10:52,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:52,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:10:52,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:52,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:52,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932592268] [2020-07-21 23:10:52,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:52,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 23:10:52,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234760304] [2020-07-21 23:10:52,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 23:10:52,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:52,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 23:10:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:10:52,329 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 14 states. [2020-07-21 23:10:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:52,427 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-07-21 23:10:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 23:10:52,428 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-07-21 23:10:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:52,429 INFO L225 Difference]: With dead ends: 71 [2020-07-21 23:10:52,430 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 23:10:52,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-07-21 23:10:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 23:10:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 23:10:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 23:10:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-07-21 23:10:52,438 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 28 [2020-07-21 23:10:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:52,439 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-07-21 23:10:52,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 23:10:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-07-21 23:10:52,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 23:10:52,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:52,441 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:52,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:52,654 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:52,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:52,655 INFO L82 PathProgramCache]: Analyzing trace with hash -850791622, now seen corresponding path program 2 times [2020-07-21 23:10:52,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:52,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805281040] [2020-07-21 23:10:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:52,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:10:52,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:52,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:10:52,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:52,752 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:10:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 23:10:52,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:10:52,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805281040] [2020-07-21 23:10:52,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:10:52,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:10:52,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055091948] [2020-07-21 23:10:52,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:10:52,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:52,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:10:52,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:10:52,772 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2020-07-21 23:10:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:52,819 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-07-21 23:10:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:10:52,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-21 23:10:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:52,821 INFO L225 Difference]: With dead ends: 76 [2020-07-21 23:10:52,822 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 23:10:52,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:10:52,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 23:10:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-07-21 23:10:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 23:10:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-07-21 23:10:52,832 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 36 [2020-07-21 23:10:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:52,833 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-07-21 23:10:52,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:10:52,833 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-07-21 23:10:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 23:10:52,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:52,835 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:53,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:53,050 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:53,051 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 1 times [2020-07-21 23:10:53,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:53,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415747381] [2020-07-21 23:10:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:53,155 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:10:53,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:53,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:10:53,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-21 23:10:53,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-21 23:10:53,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415747381] [2020-07-21 23:10:53,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:53,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 23:10:53,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860488633] [2020-07-21 23:10:53,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:10:53,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:53,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:10:53,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:10:53,271 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 8 states. [2020-07-21 23:10:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:53,394 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-07-21 23:10:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:10:53,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-21 23:10:53,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:53,398 INFO L225 Difference]: With dead ends: 168 [2020-07-21 23:10:53,399 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 23:10:53,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:10:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 23:10:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-07-21 23:10:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 23:10:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-07-21 23:10:53,428 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-07-21 23:10:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:53,431 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-07-21 23:10:53,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:10:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-07-21 23:10:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 23:10:53,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:53,434 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:53,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:53,648 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:53,649 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 2 times [2020-07-21 23:10:53,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:53,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006243003] [2020-07-21 23:10:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:53,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:10:53,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:10:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:53,833 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:10:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 23:10:53,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:53,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:10:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 23:10:53,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006243003] [2020-07-21 23:10:53,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:53,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 23:10:53,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812535263] [2020-07-21 23:10:53,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:10:53,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:53,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:10:53,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:10:53,924 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 8 states. [2020-07-21 23:10:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:54,016 INFO L93 Difference]: Finished difference Result 167 states and 201 transitions. [2020-07-21 23:10:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:10:54,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-21 23:10:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:54,019 INFO L225 Difference]: With dead ends: 167 [2020-07-21 23:10:54,019 INFO L226 Difference]: Without dead ends: 165 [2020-07-21 23:10:54,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:10:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-21 23:10:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-07-21 23:10:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 23:10:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 197 transitions. [2020-07-21 23:10:54,043 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 197 transitions. Word has length 69 [2020-07-21 23:10:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:54,043 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 197 transitions. [2020-07-21 23:10:54,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:10:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 197 transitions. [2020-07-21 23:10:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 23:10:54,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:54,048 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:54,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:54,264 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash 419958136, now seen corresponding path program 3 times [2020-07-21 23:10:54,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:54,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910938877] [2020-07-21 23:10:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:54,398 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:10:54,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:54,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 23:10:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1019 proven. 297 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-07-21 23:10:54,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1007 proven. 297 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 23:10:54,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910938877] [2020-07-21 23:10:54,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:54,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 23:10:54,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307902380] [2020-07-21 23:10:54,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 23:10:54,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:54,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 23:10:54,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:10:54,598 INFO L87 Difference]: Start difference. First operand 163 states and 197 transitions. Second operand 11 states. [2020-07-21 23:10:54,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:54,822 INFO L93 Difference]: Finished difference Result 303 states and 358 transitions. [2020-07-21 23:10:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:10:54,823 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 168 [2020-07-21 23:10:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:54,827 INFO L225 Difference]: With dead ends: 303 [2020-07-21 23:10:54,827 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 23:10:54,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:10:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 23:10:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-07-21 23:10:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 23:10:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2020-07-21 23:10:54,843 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 168 [2020-07-21 23:10:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:54,844 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-07-21 23:10:54,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 23:10:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2020-07-21 23:10:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 23:10:54,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:54,854 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 27, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:55,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:55,071 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:55,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1916434374, now seen corresponding path program 4 times [2020-07-21 23:10:55,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:55,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17522608] [2020-07-21 23:10:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:55,301 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:10:55,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:55,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 23:10:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 838 proven. 768 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-07-21 23:10:55,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 828 proven. 768 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 23:10:55,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17522608] [2020-07-21 23:10:55,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:55,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2020-07-21 23:10:55,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536009158] [2020-07-21 23:10:55,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 23:10:55,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:55,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 23:10:55,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:10:55,528 INFO L87 Difference]: Start difference. First operand 163 states and 194 transitions. Second operand 14 states. [2020-07-21 23:10:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:55,959 INFO L93 Difference]: Finished difference Result 268 states and 312 transitions. [2020-07-21 23:10:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 23:10:55,962 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 168 [2020-07-21 23:10:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:55,963 INFO L225 Difference]: With dead ends: 268 [2020-07-21 23:10:55,964 INFO L226 Difference]: Without dead ends: 205 [2020-07-21 23:10:55,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-07-21 23:10:55,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-21 23:10:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2020-07-21 23:10:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 23:10:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 190 transitions. [2020-07-21 23:10:55,989 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 190 transitions. Word has length 168 [2020-07-21 23:10:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:55,990 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 190 transitions. [2020-07-21 23:10:55,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 23:10:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 190 transitions. [2020-07-21 23:10:55,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 23:10:55,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:55,995 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 26, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:56,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:56,211 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:56,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1900915656, now seen corresponding path program 5 times [2020-07-21 23:10:56,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:56,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717747382] [2020-07-21 23:10:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:56,933 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:10:56,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:56,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 23:10:56,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-21 23:10:57,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-21 23:10:57,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717747382] [2020-07-21 23:10:57,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:57,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2020-07-21 23:10:57,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176797460] [2020-07-21 23:10:57,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 23:10:57,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 23:10:57,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-07-21 23:10:57,238 INFO L87 Difference]: Start difference. First operand 163 states and 190 transitions. Second operand 17 states. [2020-07-21 23:10:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:57,788 INFO L93 Difference]: Finished difference Result 271 states and 313 transitions. [2020-07-21 23:10:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 23:10:57,788 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-07-21 23:10:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:57,790 INFO L225 Difference]: With dead ends: 271 [2020-07-21 23:10:57,790 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 23:10:57,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-07-21 23:10:57,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 23:10:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2020-07-21 23:10:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-21 23:10:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 211 transitions. [2020-07-21 23:10:57,801 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 211 transitions. Word has length 168 [2020-07-21 23:10:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:57,802 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 211 transitions. [2020-07-21 23:10:57,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 23:10:57,802 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 211 transitions. [2020-07-21 23:10:57,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 23:10:57,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:57,804 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 25, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:58,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:58,018 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2135886202, now seen corresponding path program 6 times [2020-07-21 23:10:58,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:58,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356836726] [2020-07-21 23:10:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:58,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:10:58,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:58,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 23:10:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:58,543 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:10:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-21 23:10:58,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:58,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:10:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-21 23:10:58,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356836726] [2020-07-21 23:10:58,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:58,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 23:10:58,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809427535] [2020-07-21 23:10:58,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 23:10:58,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:58,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 23:10:58,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:10:58,742 INFO L87 Difference]: Start difference. First operand 184 states and 211 transitions. Second operand 14 states. [2020-07-21 23:10:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:58,948 INFO L93 Difference]: Finished difference Result 345 states and 414 transitions. [2020-07-21 23:10:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 23:10:58,949 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 168 [2020-07-21 23:10:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:58,953 INFO L225 Difference]: With dead ends: 345 [2020-07-21 23:10:58,953 INFO L226 Difference]: Without dead ends: 343 [2020-07-21 23:10:58,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-07-21 23:10:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-07-21 23:10:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2020-07-21 23:10:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-07-21 23:10:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 410 transitions. [2020-07-21 23:10:58,973 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 410 transitions. Word has length 168 [2020-07-21 23:10:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:58,973 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 410 transitions. [2020-07-21 23:10:58,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 23:10:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 410 transitions. [2020-07-21 23:10:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-07-21 23:10:58,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:58,979 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 61, 11, 11, 11, 11, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:59,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:59,194 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:59,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1434461414, now seen corresponding path program 7 times [2020-07-21 23:10:59,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:59,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061153383] [2020-07-21 23:10:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:11:01,167 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:11:01,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:11:01,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:11:01,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:11:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9761 backedges. 7345 proven. 0 refuted. 0 times theorem prover too weak. 2416 trivial. 0 not checked. [2020-07-21 23:11:01,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:11:01,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061153383] [2020-07-21 23:11:01,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:11:01,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 23:11:01,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179409766] [2020-07-21 23:11:01,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 23:11:01,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:11:01,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 23:11:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:11:01,439 INFO L87 Difference]: Start difference. First operand 341 states and 410 transitions. Second operand 9 states. [2020-07-21 23:11:01,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:11:01,589 INFO L93 Difference]: Finished difference Result 345 states and 413 transitions. [2020-07-21 23:11:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 23:11:01,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 366 [2020-07-21 23:11:01,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:11:01,591 INFO L225 Difference]: With dead ends: 345 [2020-07-21 23:11:01,591 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:11:01,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:11:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:11:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:11:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:11:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:11:01,594 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 366 [2020-07-21 23:11:01,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:11:01,594 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:11:01,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 23:11:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:11:01,594 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:11:01,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:11:01,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:11:02,211 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-07-21 23:11:02,464 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2020-07-21 23:11:02,493 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-07-21 23:11:02,493 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-07-21 23:11:02,493 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-07-21 23:11:02,493 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-07-21 23:11:02,493 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-07-21 23:11:02,493 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-07-21 23:11:02,493 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-07-21 23:11:02,494 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-07-21 23:11:02,494 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-07-21 23:11:02,494 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-07-21 23:11:02,494 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-07-21 23:11:02,494 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-07-21 23:11:02,494 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-07-21 23:11:02,494 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-07-21 23:11:02,494 INFO L271 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: true [2020-07-21 23:11:02,495 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-07-21 23:11:02,495 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-07-21 23:11:02,495 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-07-21 23:11:02,495 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-07-21 23:11:02,495 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-21 23:11:02,495 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-07-21 23:11:02,496 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-07-21 23:11:02,496 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-07-21 23:11:02,496 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-07-21 23:11:02,497 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-07-21 23:11:02,497 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-07-21 23:11:02,498 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-07-21 23:11:02,498 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-07-21 23:11:02,498 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-07-21 23:11:02,498 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-21 23:11:02,498 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-07-21 23:11:02,498 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-07-21 23:11:02,498 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-07-21 23:11:02,498 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:11:02,498 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:11:02,499 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:11:02,499 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-07-21 23:11:02,499 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-07-21 23:11:02,499 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-07-21 23:11:02,499 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-07-21 23:11:02,499 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-07-21 23:11:02,499 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:11:02,499 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:11:02,499 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:11:02,500 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:11:02,500 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-21 23:11:02,500 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-07-21 23:11:02,500 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-07-21 23:11:02,500 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-07-21 23:11:02,500 INFO L264 CegarLoopResult]: At program point L91-3(lines 91 102) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 4 main_~i~0)) (and .cse0 .cse1 (= 0 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (< main_~i~0 47) (<= 6 main_~i~0)))) [2020-07-21 23:11:02,501 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-07-21 23:11:02,501 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-07-21 23:11:02,501 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 23:11:02,501 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-21 23:11:02,501 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: true [2020-07-21 23:11:02,501 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-07-21 23:11:02,501 INFO L264 CegarLoopResult]: At program point L94-3(lines 94 99) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 0 main_~i~0)) (and .cse0 (<= main_~i~0 4) .cse1 (<= 4 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1))) [2020-07-21 23:11:02,501 INFO L264 CegarLoopResult]: At program point L94-4(lines 94 99) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 0 main_~i~0)) (and .cse0 (<= main_~i~0 4) .cse1 (<= 4 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1))) [2020-07-21 23:11:02,502 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 23:11:02,502 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 23:11:02,502 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 23:11:02,502 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 23:11:02,502 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 23:11:02,502 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 23:11:02,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:11:02 BoogieIcfgContainer [2020-07-21 23:11:02,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:11:02,545 INFO L168 Benchmark]: Toolchain (without parser) took 13541.38 ms. Allocated memory was 145.8 MB in the beginning and 325.6 MB in the end (delta: 179.8 MB). Free memory was 103.7 MB in the beginning and 175.5 MB in the end (delta: -71.8 MB). Peak memory consumption was 108.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:02,545 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 23:11:02,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.43 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 103.3 MB in the beginning and 179.2 MB in the end (delta: -75.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:02,547 INFO L168 Benchmark]: Boogie Preprocessor took 66.21 ms. Allocated memory is still 202.4 MB. Free memory was 179.2 MB in the beginning and 176.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:02,548 INFO L168 Benchmark]: RCFGBuilder took 545.11 ms. Allocated memory is still 202.4 MB. Free memory was 176.5 MB in the beginning and 149.0 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:02,548 INFO L168 Benchmark]: TraceAbstraction took 12506.27 ms. Allocated memory was 202.4 MB in the beginning and 325.6 MB in the end (delta: 123.2 MB). Free memory was 148.3 MB in the beginning and 175.5 MB in the end (delta: -27.2 MB). Peak memory consumption was 96.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:02,551 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 417.43 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 103.3 MB in the beginning and 179.2 MB in the end (delta: -75.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.21 ms. Allocated memory is still 202.4 MB. Free memory was 179.2 MB in the beginning and 176.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 545.11 ms. Allocated memory is still 202.4 MB. Free memory was 176.5 MB in the beginning and 149.0 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12506.27 ms. Allocated memory was 202.4 MB in the beginning and 325.6 MB in the end (delta: 123.2 MB). Free memory was 148.3 MB in the beginning and 175.5 MB in the end (delta: -27.2 MB). Peak memory consumption was 96.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 116]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 94]: Loop Invariant Derived loop invariant: ((((((n <= 5 && 5 <= n) && 0 == i) || (((n <= 5 && i <= 4) && 5 <= n) && 4 <= i)) || ((2 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i <= 1) && 1 <= i)) || (((n <= 5 && 5 <= i) && 5 <= n) && i < 46)) || ((3 == i && n <= 5) && 5 <= n) - InvariantResult [Line: 127]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 123]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 91]: Loop Invariant Derived loop invariant: (((((((n <= 5 && 5 <= n) && 4 == i) || ((n <= 5 && 5 <= n) && 0 == i)) || ((2 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i <= 1) && 1 <= i)) || (((n <= 5 && 5 <= i) && 5 <= n) && i < 46)) || ((3 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i < 47) && 6 <= i) - InvariantResult [Line: 119]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 130]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 136]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.6s, OverallIterations: 13, TraceHistogramMax: 66, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 342 SDtfs, 295 SDslu, 1105 SDs, 0 SdLazy, 1956 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2175 GetRequests, 2053 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=341occurred in iteration=12, 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, 13 MinimizatonAttempts, 227 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 55 PreInvPairs, 121 NumberOfFragments, 238 HoareAnnotationTreeSize, 55 FomulaSimplifications, 2209 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 21 FomulaSimplificationsInter, 222 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 1308 NumberOfCodeBlocks, 1053 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 2141 ConstructedInterpolants, 0 QuantifiedInterpolants, 1138863 SizeOfPredicates, 24 NumberOfNonLiveVariables, 2767 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 18097/26797 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...