/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:54:57,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:54:57,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:54:57,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:54:57,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:54:57,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:54:57,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:54:57,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:54:57,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:54:57,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:54:57,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:54:57,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:54:57,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:54:57,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:54:57,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:54:57,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:54:57,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:54:57,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:54:57,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:54:57,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:54:57,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:54:57,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:54:57,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:54:57,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:54:57,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 03:54:57,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 03:54:57,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 03:54:57,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 03:54:57,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 03:54:57,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 03:54:57,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 03:54:57,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 03:54:57,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 03:54:57,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 03:54:57,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 03:54:57,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 03:54:57,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 03:54:57,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 03:54:57,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:54:57,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:54:57,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:54:57,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:54:57,490 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:54:57,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:54:57,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:54:57,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:54:57,495 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:54:57,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:54:57,496 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:54:57,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:54:57,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:54:57,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:54:57,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:54:57,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:54:57,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:54:57,500 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:54:57,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:54:57,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:54:57,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:54:57,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:54:57,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:54:57,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:54:57,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:54:57,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:54:57,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:54:57,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:54:57,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:54:57,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:54:57,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:54:57,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:54:57,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:54:57,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:54:57,945 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:54:57,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:54:57,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:54:57,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:54:57,972 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:54:57,973 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-07-20 03:54:58,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54421737d/ff8a4ee3df334dbe9a185aaa71fb5b3b/FLAG0725bf7c0 [2020-07-20 03:54:58,762 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:54:58,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-07-20 03:54:58,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54421737d/ff8a4ee3df334dbe9a185aaa71fb5b3b/FLAG0725bf7c0 [2020-07-20 03:54:59,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54421737d/ff8a4ee3df334dbe9a185aaa71fb5b3b [2020-07-20 03:54:59,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:54:59,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:54:59,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:54:59,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:54:59,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:54:59,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@465bdf2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59, skipping insertion in model container [2020-07-20 03:54:59,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:54:59,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:54:59,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:54:59,411 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:54:59,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:54:59,454 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:54:59,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59 WrapperNode [2020-07-20 03:54:59,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:54:59,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:54:59,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:54:59,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:54:59,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... [2020-07-20 03:54:59,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:54:59,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:54:59,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:54:59,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:54:59,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:54:59,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:54:59,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:54:59,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 03:54:59,687 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-07-20 03:54:59,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:54:59,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:54:59,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 03:54:59,688 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 03:54:59,688 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-07-20 03:54:59,688 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 03:54:59,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 03:54:59,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 03:54:59,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:54:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 03:54:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 03:54:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 03:54:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:54:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:54:59,989 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:54:59,990 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 03:54:59,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:54:59 BoogieIcfgContainer [2020-07-20 03:54:59,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:54:59,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:55:00,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:55:00,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:55:00,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:54:59" (1/3) ... [2020-07-20 03:55:00,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46aa79e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:55:00, skipping insertion in model container [2020-07-20 03:55:00,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:54:59" (2/3) ... [2020-07-20 03:55:00,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46aa79e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:55:00, skipping insertion in model container [2020-07-20 03:55:00,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:54:59" (3/3) ... [2020-07-20 03:55:00,011 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-07-20 03:55:00,030 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:55:00,043 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:55:00,064 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:55:00,092 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:55:00,093 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:55:00,093 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:55:00,093 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:55:00,093 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:55:00,093 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:55:00,094 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:55:00,094 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:55:00,118 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 03:55:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 03:55:00,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:00,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:00,132 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:00,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-07-20 03:55:00,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:00,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851372308] [2020-07-20 03:55:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:00,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851372308] [2020-07-20 03:55:00,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:00,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 03:55:00,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865586193] [2020-07-20 03:55:00,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 03:55:00,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:00,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 03:55:00,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:55:00,461 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-07-20 03:55:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:00,677 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-07-20 03:55:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:55:00,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 03:55:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:00,694 INFO L225 Difference]: With dead ends: 59 [2020-07-20 03:55:00,694 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 03:55:00,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:55:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 03:55:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-07-20 03:55:00,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 03:55:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 03:55:00,743 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-07-20 03:55:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:00,743 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 03:55:00,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 03:55:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 03:55:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 03:55:00,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:00,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:00,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:55:00,745 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:00,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:00,746 INFO L82 PathProgramCache]: Analyzing trace with hash -931069882, now seen corresponding path program 1 times [2020-07-20 03:55:00,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:00,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11752566] [2020-07-20 03:55:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:00,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11752566] [2020-07-20 03:55:00,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:00,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 03:55:00,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730445752] [2020-07-20 03:55:00,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 03:55:00,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:00,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 03:55:00,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:55:00,975 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-20 03:55:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:01,275 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 03:55:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:55:01,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 03:55:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:01,277 INFO L225 Difference]: With dead ends: 48 [2020-07-20 03:55:01,277 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:55:01,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:55:01,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:55:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-20 03:55:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 03:55:01,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-20 03:55:01,288 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-07-20 03:55:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:01,288 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-20 03:55:01,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 03:55:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-20 03:55:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 03:55:01,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:01,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:01,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:55:01,290 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:01,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1782065480, now seen corresponding path program 1 times [2020-07-20 03:55:01,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:01,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141352027] [2020-07-20 03:55:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:01,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141352027] [2020-07-20 03:55:01,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681272173] [2020-07-20 03:55:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72490265 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:01,547 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72490265 issued 2 check-sat command(s) [2020-07-20 03:55:01,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:01,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 03:55:01,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:01,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:01,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-07-20 03:55:01,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403505518] [2020-07-20 03:55:01,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:55:01,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:01,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:55:01,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:55:01,633 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 10 states. [2020-07-20 03:55:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:01,935 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-20 03:55:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:55:01,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-07-20 03:55:01,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:01,937 INFO L225 Difference]: With dead ends: 50 [2020-07-20 03:55:01,937 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 03:55:01,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:55:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 03:55:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-20 03:55:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 03:55:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 03:55:01,956 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-20 03:55:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:01,957 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 03:55:01,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:55:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 03:55:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 03:55:01,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:01,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:02,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:55:02,168 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2059999690, now seen corresponding path program 2 times [2020-07-20 03:55:02,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:02,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630075355] [2020-07-20 03:55:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:02,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630075355] [2020-07-20 03:55:02,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245664107] [2020-07-20 03:55:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ed5669 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:02,556 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ed5669 issued 2 check-sat command(s) [2020-07-20 03:55:02,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:02,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:55:02,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:02,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:02,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-07-20 03:55:02,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228050195] [2020-07-20 03:55:02,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:55:02,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:02,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:55:02,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:55:02,656 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 12 states. [2020-07-20 03:55:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:03,146 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-07-20 03:55:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:55:03,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-07-20 03:55:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:03,148 INFO L225 Difference]: With dead ends: 52 [2020-07-20 03:55:03,149 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 03:55:03,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:55:03,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 03:55:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-20 03:55:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:55:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 03:55:03,160 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-07-20 03:55:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:03,160 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 03:55:03,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:55:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 03:55:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:55:03,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:03,162 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:03,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:03,379 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1428164148, now seen corresponding path program 3 times [2020-07-20 03:55:03,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:03,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404564195] [2020-07-20 03:55:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:03,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404564195] [2020-07-20 03:55:03,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215562081] [2020-07-20 03:55:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61f3e059 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:03,756 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61f3e059 issued 2 check-sat command(s) [2020-07-20 03:55:03,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:03,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 03:55:03,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:03,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:03,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-07-20 03:55:03,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78979575] [2020-07-20 03:55:03,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:55:03,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:55:03,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:55:03,863 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 14 states. [2020-07-20 03:55:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:04,380 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-07-20 03:55:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:55:04,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-07-20 03:55:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:04,382 INFO L225 Difference]: With dead ends: 54 [2020-07-20 03:55:04,382 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 03:55:04,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-07-20 03:55:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 03:55:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-20 03:55:04,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 03:55:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 03:55:04,411 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-07-20 03:55:04,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:04,415 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 03:55:04,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:55:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 03:55:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:55:04,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:04,418 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:04,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:04,635 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:04,636 INFO L82 PathProgramCache]: Analyzing trace with hash 815845710, now seen corresponding path program 4 times [2020-07-20 03:55:04,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:04,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259558629] [2020-07-20 03:55:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:04,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259558629] [2020-07-20 03:55:04,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059936018] [2020-07-20 03:55:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@274832e1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:05,037 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@274832e1 issued 3 check-sat command(s) [2020-07-20 03:55:05,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:55:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:05,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:05,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2020-07-20 03:55:05,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667541710] [2020-07-20 03:55:05,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:55:05,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:05,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:55:05,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:55:05,182 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2020-07-20 03:55:05,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:05,767 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-07-20 03:55:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:55:05,771 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-07-20 03:55:05,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:05,772 INFO L225 Difference]: With dead ends: 56 [2020-07-20 03:55:05,772 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 03:55:05,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:55:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 03:55:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-07-20 03:55:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 03:55:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-07-20 03:55:05,795 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-07-20 03:55:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:05,795 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-07-20 03:55:05,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:55:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-07-20 03:55:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 03:55:05,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:05,800 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:06,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:06,018 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1235736656, now seen corresponding path program 5 times [2020-07-20 03:55:06,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:06,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962092296] [2020-07-20 03:55:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:06,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962092296] [2020-07-20 03:55:06,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330046074] [2020-07-20 03:55:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@86b5db1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:06,446 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@86b5db1 issued 3 check-sat command(s) [2020-07-20 03:55:06,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:06,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 03:55:06,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:06,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:06,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-07-20 03:55:06,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516668079] [2020-07-20 03:55:06,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:55:06,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:06,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:55:06,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:55:06,645 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 18 states. [2020-07-20 03:55:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:07,306 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-07-20 03:55:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:55:07,307 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-07-20 03:55:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:07,308 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:55:07,309 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 03:55:07,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-07-20 03:55:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 03:55:07,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-20 03:55:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 03:55:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-20 03:55:07,318 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-07-20 03:55:07,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:07,318 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-20 03:55:07,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:55:07,318 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-20 03:55:07,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 03:55:07,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:07,319 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:07,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:55:07,524 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1024009938, now seen corresponding path program 6 times [2020-07-20 03:55:07,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:07,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521025520] [2020-07-20 03:55:07,526 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:07,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521025520] [2020-07-20 03:55:07,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497641734] [2020-07-20 03:55:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1bbd19df No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:08,120 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1bbd19df issued 3 check-sat command(s) [2020-07-20 03:55:08,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:08,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:55:08,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:08,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:08,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2020-07-20 03:55:08,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431591248] [2020-07-20 03:55:08,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 03:55:08,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:08,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 03:55:08,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:55:08,367 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 20 states. [2020-07-20 03:55:09,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:09,035 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-07-20 03:55:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 03:55:09,035 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-07-20 03:55:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:09,037 INFO L225 Difference]: With dead ends: 60 [2020-07-20 03:55:09,037 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 03:55:09,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-07-20 03:55:09,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 03:55:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 03:55:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 03:55:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-20 03:55:09,045 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-07-20 03:55:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:09,046 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-20 03:55:09,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 03:55:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-20 03:55:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 03:55:09,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:09,048 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:09,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:09,262 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash -581903148, now seen corresponding path program 7 times [2020-07-20 03:55:09,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:09,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625698153] [2020-07-20 03:55:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:09,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625698153] [2020-07-20 03:55:09,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486551241] [2020-07-20 03:55:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@286668ed No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:09,863 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@286668ed issued 3 check-sat command(s) [2020-07-20 03:55:09,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:09,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 03:55:09,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:10,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:10,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-07-20 03:55:10,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341318368] [2020-07-20 03:55:10,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 03:55:10,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:10,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 03:55:10,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:55:10,094 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 22 states. [2020-07-20 03:55:10,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:10,777 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-20 03:55:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:55:10,778 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 34 [2020-07-20 03:55:10,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:10,780 INFO L225 Difference]: With dead ends: 62 [2020-07-20 03:55:10,780 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 03:55:10,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 03:55:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 03:55:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-20 03:55:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 03:55:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-07-20 03:55:10,794 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-07-20 03:55:10,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:10,795 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-07-20 03:55:10,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 03:55:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-07-20 03:55:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 03:55:10,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:10,796 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:11,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:11,006 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1971119530, now seen corresponding path program 8 times [2020-07-20 03:55:11,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:11,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982967135] [2020-07-20 03:55:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:11,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982967135] [2020-07-20 03:55:11,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136245858] [2020-07-20 03:55:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@606552d8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:11,880 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@606552d8 issued 3 check-sat command(s) [2020-07-20 03:55:11,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:11,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:55:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:55:12,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:12,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-07-20 03:55:12,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538688250] [2020-07-20 03:55:12,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 03:55:12,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:12,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 03:55:12,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:55:12,150 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 24 states. [2020-07-20 03:55:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:12,885 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-07-20 03:55:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 03:55:12,885 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2020-07-20 03:55:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:12,887 INFO L225 Difference]: With dead ends: 64 [2020-07-20 03:55:12,887 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 03:55:12,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 03:55:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 03:55:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-20 03:55:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 03:55:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-20 03:55:12,896 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-20 03:55:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:12,896 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-20 03:55:12,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 03:55:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-20 03:55:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 03:55:12,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:12,898 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:13,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 03:55:13,114 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:13,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1273233576, now seen corresponding path program 9 times [2020-07-20 03:55:13,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:13,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796965138] [2020-07-20 03:55:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-20 03:55:13,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796965138] [2020-07-20 03:55:13,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:55:13,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:55:13,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825475546] [2020-07-20 03:55:13,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:55:13,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:13,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:55:13,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:55:13,218 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-07-20 03:55:13,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:13,378 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-07-20 03:55:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:55:13,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-07-20 03:55:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:13,382 INFO L225 Difference]: With dead ends: 65 [2020-07-20 03:55:13,382 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 03:55:13,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:55:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 03:55:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-07-20 03:55:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 03:55:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-20 03:55:13,413 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-07-20 03:55:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:13,413 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-20 03:55:13,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:55:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-20 03:55:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 03:55:13,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:13,416 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:13,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 03:55:13,417 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:13,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:13,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1053921041, now seen corresponding path program 1 times [2020-07-20 03:55:13,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:13,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475362230] [2020-07-20 03:55:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-20 03:55:13,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475362230] [2020-07-20 03:55:13,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262455785] [2020-07-20 03:55:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ceb7bc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:13,868 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ceb7bc issued 2 check-sat command(s) [2020-07-20 03:55:13,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:13,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 03:55:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-20 03:55:13,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:55:13,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 03:55:13,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817357604] [2020-07-20 03:55:13,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:55:13,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:13,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:55:13,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:55:13,888 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 3 states. [2020-07-20 03:55:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:13,896 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-07-20 03:55:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:55:13,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-20 03:55:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:13,898 INFO L225 Difference]: With dead ends: 64 [2020-07-20 03:55:13,898 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 03:55:13,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:55:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 03:55:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-20 03:55:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 03:55:13,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-07-20 03:55:13,905 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 41 [2020-07-20 03:55:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:13,905 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-07-20 03:55:13,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:55:13,906 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-07-20 03:55:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 03:55:13,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:13,907 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:14,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:14,120 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:14,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1446948051, now seen corresponding path program 1 times [2020-07-20 03:55:14,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:14,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203752152] [2020-07-20 03:55:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-20 03:55:14,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203752152] [2020-07-20 03:55:14,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748310190] [2020-07-20 03:55:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35f0a29 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:15,016 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35f0a29 issued 3 check-sat command(s) [2020-07-20 03:55:15,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:15,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 03:55:15,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:55:15,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:15,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2020-07-20 03:55:15,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242583081] [2020-07-20 03:55:15,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 03:55:15,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:15,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 03:55:15,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:55:15,377 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 17 states. [2020-07-20 03:55:15,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:15,708 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-07-20 03:55:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 03:55:15,709 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-07-20 03:55:15,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:15,710 INFO L225 Difference]: With dead ends: 83 [2020-07-20 03:55:15,710 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 03:55:15,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:55:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 03:55:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2020-07-20 03:55:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 03:55:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-07-20 03:55:15,718 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 41 [2020-07-20 03:55:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:15,719 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-07-20 03:55:15,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 03:55:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-07-20 03:55:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 03:55:15,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:15,720 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:15,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:15,936 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:15,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:15,937 INFO L82 PathProgramCache]: Analyzing trace with hash 763672122, now seen corresponding path program 2 times [2020-07-20 03:55:15,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:15,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787212938] [2020-07-20 03:55:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:16,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787212938] [2020-07-20 03:55:16,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552746479] [2020-07-20 03:55:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19d29b10 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:17,095 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19d29b10 issued 3 check-sat command(s) [2020-07-20 03:55:17,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:17,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 03:55:17,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:17,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:17,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-07-20 03:55:17,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721764319] [2020-07-20 03:55:17,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 03:55:17,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:17,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 03:55:17,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2020-07-20 03:55:17,446 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 28 states. [2020-07-20 03:55:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:18,230 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-07-20 03:55:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 03:55:18,232 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-07-20 03:55:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:18,233 INFO L225 Difference]: With dead ends: 76 [2020-07-20 03:55:18,233 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 03:55:18,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 03:55:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 03:55:18,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-20 03:55:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 03:55:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-07-20 03:55:18,251 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-07-20 03:55:18,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:18,251 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-07-20 03:55:18,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 03:55:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-07-20 03:55:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 03:55:18,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:18,252 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:18,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 03:55:18,469 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash -154353476, now seen corresponding path program 3 times [2020-07-20 03:55:18,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:18,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018375558] [2020-07-20 03:55:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:19,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018375558] [2020-07-20 03:55:19,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806352230] [2020-07-20 03:55:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@319bf0ab No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:20,559 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@319bf0ab issued 3 check-sat command(s) [2020-07-20 03:55:20,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 03:55:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:20,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:20,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2020-07-20 03:55:20,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712753920] [2020-07-20 03:55:20,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 03:55:20,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:20,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 03:55:20,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-07-20 03:55:20,974 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 30 states. [2020-07-20 03:55:21,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:21,863 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-07-20 03:55:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 03:55:21,864 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 48 [2020-07-20 03:55:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:21,865 INFO L225 Difference]: With dead ends: 78 [2020-07-20 03:55:21,865 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 03:55:21,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=499, Invalid=1481, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 03:55:21,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 03:55:21,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-20 03:55:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 03:55:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-07-20 03:55:21,874 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-07-20 03:55:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:21,874 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-07-20 03:55:21,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 03:55:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-07-20 03:55:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 03:55:21,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:21,875 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:22,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-20 03:55:22,084 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:22,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:22,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1908657474, now seen corresponding path program 4 times [2020-07-20 03:55:22,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:22,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113370692] [2020-07-20 03:55:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:22,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113370692] [2020-07-20 03:55:22,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412484419] [2020-07-20 03:55:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@706bd932 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:23,467 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@706bd932 issued 3 check-sat command(s) [2020-07-20 03:55:23,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:23,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 03:55:23,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:23,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:23,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2020-07-20 03:55:23,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262856458] [2020-07-20 03:55:23,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 03:55:23,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 03:55:23,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2020-07-20 03:55:23,973 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 32 states. [2020-07-20 03:55:25,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:25,122 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-07-20 03:55:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 03:55:25,123 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2020-07-20 03:55:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:25,125 INFO L225 Difference]: With dead ends: 80 [2020-07-20 03:55:25,125 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 03:55:25,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 03:55:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 03:55:25,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-20 03:55:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 03:55:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-07-20 03:55:25,133 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-07-20 03:55:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:25,134 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-07-20 03:55:25,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 03:55:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-07-20 03:55:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 03:55:25,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:25,135 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:25,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 03:55:25,337 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:25,338 INFO L82 PathProgramCache]: Analyzing trace with hash 127347776, now seen corresponding path program 5 times [2020-07-20 03:55:25,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:25,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688140340] [2020-07-20 03:55:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:26,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688140340] [2020-07-20 03:55:26,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711568801] [2020-07-20 03:55:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cc07036 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:27,628 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2cc07036 issued 3 check-sat command(s) [2020-07-20 03:55:27,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:27,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 03:55:27,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:28,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:28,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2020-07-20 03:55:28,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363013335] [2020-07-20 03:55:28,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 03:55:28,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:28,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 03:55:28,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 03:55:28,224 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 34 states. [2020-07-20 03:55:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:29,544 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-07-20 03:55:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:55:29,546 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-07-20 03:55:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:29,547 INFO L225 Difference]: With dead ends: 82 [2020-07-20 03:55:29,548 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 03:55:29,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=648, Invalid=1902, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 03:55:29,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 03:55:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-07-20 03:55:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 03:55:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-07-20 03:55:29,558 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-07-20 03:55:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:29,559 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-07-20 03:55:29,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 03:55:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-07-20 03:55:29,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 03:55:29,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:29,560 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:29,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:29,774 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:29,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1776693950, now seen corresponding path program 6 times [2020-07-20 03:55:29,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:29,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99705493] [2020-07-20 03:55:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:30,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99705493] [2020-07-20 03:55:30,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654056573] [2020-07-20 03:55:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@69809201 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:33,065 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@69809201 issued 3 check-sat command(s) [2020-07-20 03:55:33,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:33,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 03:55:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:33,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:33,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2020-07-20 03:55:33,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516151406] [2020-07-20 03:55:33,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 03:55:33,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:33,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 03:55:33,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 03:55:33,744 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 36 states. [2020-07-20 03:55:34,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:34,937 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-07-20 03:55:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 03:55:34,938 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 54 [2020-07-20 03:55:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:34,939 INFO L225 Difference]: With dead ends: 84 [2020-07-20 03:55:34,939 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 03:55:34,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-07-20 03:55:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 03:55:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-07-20 03:55:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 03:55:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-07-20 03:55:34,944 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-07-20 03:55:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:34,944 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-07-20 03:55:34,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 03:55:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-07-20 03:55:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 03:55:34,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:34,945 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:35,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 03:55:35,147 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:35,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1904724540, now seen corresponding path program 7 times [2020-07-20 03:55:35,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:35,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872597642] [2020-07-20 03:55:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:35,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872597642] [2020-07-20 03:55:35,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051541066] [2020-07-20 03:55:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46e1654e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:38,795 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46e1654e issued 3 check-sat command(s) [2020-07-20 03:55:38,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 03:55:38,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:39,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:39,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2020-07-20 03:55:39,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503932946] [2020-07-20 03:55:39,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 03:55:39,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:39,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 03:55:39,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1092, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 03:55:39,540 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 38 states. [2020-07-20 03:55:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:40,796 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-07-20 03:55:40,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 03:55:40,797 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2020-07-20 03:55:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:40,798 INFO L225 Difference]: With dead ends: 86 [2020-07-20 03:55:40,798 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 03:55:40,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 03:55:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 03:55:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-07-20 03:55:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 03:55:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-07-20 03:55:40,803 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-07-20 03:55:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:40,804 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-07-20 03:55:40,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 03:55:40,804 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-07-20 03:55:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 03:55:40,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:40,804 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:41,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:41,005 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash -388069946, now seen corresponding path program 8 times [2020-07-20 03:55:41,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:41,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361856800] [2020-07-20 03:55:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:41,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361856800] [2020-07-20 03:55:41,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712258990] [2020-07-20 03:55:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3493a77f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:45,590 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3493a77f issued 3 check-sat command(s) [2020-07-20 03:55:45,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:45,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 03:55:45,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:46,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:46,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 40 [2020-07-20 03:55:46,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179370130] [2020-07-20 03:55:46,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 03:55:46,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:46,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 03:55:46,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1210, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 03:55:46,390 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 40 states. [2020-07-20 03:55:47,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:47,854 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-07-20 03:55:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 03:55:47,855 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 58 [2020-07-20 03:55:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:47,857 INFO L225 Difference]: With dead ends: 88 [2020-07-20 03:55:47,857 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 03:55:47,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=909, Invalid=2631, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 03:55:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 03:55:47,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-07-20 03:55:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 03:55:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-07-20 03:55:47,864 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-07-20 03:55:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:47,864 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-07-20 03:55:47,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 03:55:47,864 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-07-20 03:55:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-20 03:55:47,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:47,865 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:48,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:48,080 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:48,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1123081544, now seen corresponding path program 9 times [2020-07-20 03:55:48,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:48,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16617792] [2020-07-20 03:55:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:49,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16617792] [2020-07-20 03:55:49,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250294582] [2020-07-20 03:55:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4238d49d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:55:53,300 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4238d49d issued 3 check-sat command(s) [2020-07-20 03:55:53,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:55:53,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 03:55:53,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:55:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:54,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:55:54,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2020-07-20 03:55:54,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750319084] [2020-07-20 03:55:54,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-20 03:55:54,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:55:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-20 03:55:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 03:55:54,067 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 42 states. [2020-07-20 03:55:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:55:55,484 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-07-20 03:55:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 03:55:55,485 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 60 [2020-07-20 03:55:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:55:55,486 INFO L225 Difference]: With dead ends: 90 [2020-07-20 03:55:55,486 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 03:55:55,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 03:55:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 03:55:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-07-20 03:55:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 03:55:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-07-20 03:55:55,493 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-07-20 03:55:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:55:55,494 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-07-20 03:55:55,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-20 03:55:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-07-20 03:55:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 03:55:55,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:55:55,495 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:55:55,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 03:55:55,710 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:55:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:55:55,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1640717386, now seen corresponding path program 10 times [2020-07-20 03:55:55,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:55:55,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65976123] [2020-07-20 03:55:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:55:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:55:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:55:57,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65976123] [2020-07-20 03:55:57,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788408660] [2020-07-20 03:55:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16dfb181 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:56:07,354 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16dfb181 issued 3 check-sat command(s) [2020-07-20 03:56:07,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:56:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 03:56:07,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:56:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:56:08,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:56:08,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2020-07-20 03:56:08,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089905600] [2020-07-20 03:56:08,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-20 03:56:08,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:56:08,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-20 03:56:08,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1464, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 03:56:08,209 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 44 states. [2020-07-20 03:56:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:56:09,761 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-07-20 03:56:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 03:56:09,764 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 62 [2020-07-20 03:56:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:56:09,766 INFO L225 Difference]: With dead ends: 92 [2020-07-20 03:56:09,766 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 03:56:09,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1108, Invalid=3182, Unknown=0, NotChecked=0, Total=4290 [2020-07-20 03:56:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 03:56:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-07-20 03:56:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 03:56:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-07-20 03:56:09,773 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-07-20 03:56:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:56:09,773 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-07-20 03:56:09,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-20 03:56:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-07-20 03:56:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-20 03:56:09,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:56:09,774 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:56:09,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:56:09,987 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:56:09,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:56:09,988 INFO L82 PathProgramCache]: Analyzing trace with hash 872555212, now seen corresponding path program 11 times [2020-07-20 03:56:09,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:56:09,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296273945] [2020-07-20 03:56:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:56:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:56:11,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296273945] [2020-07-20 03:56:11,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267011718] [2020-07-20 03:56:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@83a0454 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:56:19,544 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@83a0454 issued 4 check-sat command(s) [2020-07-20 03:56:19,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:56:19,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 03:56:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:56:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:56:20,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:56:20,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2020-07-20 03:56:20,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171536034] [2020-07-20 03:56:20,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-20 03:56:20,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:56:20,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-20 03:56:20,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 03:56:20,506 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 46 states. [2020-07-20 03:56:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:56:22,152 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-07-20 03:56:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 03:56:22,153 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2020-07-20 03:56:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:56:22,154 INFO L225 Difference]: With dead ends: 94 [2020-07-20 03:56:22,154 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 03:56:22,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1215, Invalid=3477, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 03:56:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 03:56:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-07-20 03:56:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 03:56:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-07-20 03:56:22,160 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-07-20 03:56:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:56:22,161 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-07-20 03:56:22,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-20 03:56:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-07-20 03:56:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-20 03:56:22,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:56:22,162 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:56:22,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-20 03:56:22,365 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:56:22,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:56:22,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1403080910, now seen corresponding path program 12 times [2020-07-20 03:56:22,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:56:22,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444587055] [2020-07-20 03:56:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:56:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:56:23,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444587055] [2020-07-20 03:56:23,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615070223] [2020-07-20 03:56:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29d93a38 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:56:30,964 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29d93a38 issued 3 check-sat command(s) [2020-07-20 03:56:30,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:56:31,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 03:56:31,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:56:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:56:32,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:56:32,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2020-07-20 03:56:32,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322953091] [2020-07-20 03:56:32,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 03:56:32,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:56:32,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 03:56:32,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=1742, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 03:56:32,082 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 48 states. [2020-07-20 03:56:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:56:33,847 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-07-20 03:56:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 03:56:33,848 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2020-07-20 03:56:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:56:33,849 INFO L225 Difference]: With dead ends: 96 [2020-07-20 03:56:33,849 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 03:56:33,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1327, Invalid=3785, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 03:56:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 03:56:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-07-20 03:56:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 03:56:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-07-20 03:56:33,859 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-07-20 03:56:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:56:33,859 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-07-20 03:56:33,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 03:56:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-07-20 03:56:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 03:56:33,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:56:33,860 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:56:34,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 03:56:34,068 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:56:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:56:34,068 INFO L82 PathProgramCache]: Analyzing trace with hash 137168464, now seen corresponding path program 13 times [2020-07-20 03:56:34,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:56:34,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013065603] [2020-07-20 03:56:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:56:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:56:35,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013065603] [2020-07-20 03:56:35,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211225718] [2020-07-20 03:56:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4740c575 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:56:46,465 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4740c575 issued 4 check-sat command(s) [2020-07-20 03:56:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:56:46,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 03:56:46,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:56:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:56:47,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:56:47,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 50 [2020-07-20 03:56:47,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827865289] [2020-07-20 03:56:47,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 03:56:47,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:56:47,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 03:56:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=1890, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 03:56:47,815 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 50 states. [2020-07-20 03:56:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:56:49,747 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-07-20 03:56:49,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 03:56:49,748 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 68 [2020-07-20 03:56:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:56:49,749 INFO L225 Difference]: With dead ends: 98 [2020-07-20 03:56:49,749 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 03:56:49,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1444, Invalid=4106, Unknown=0, NotChecked=0, Total=5550 [2020-07-20 03:56:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 03:56:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-07-20 03:56:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 03:56:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-07-20 03:56:49,755 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-07-20 03:56:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:56:49,755 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-07-20 03:56:49,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 03:56:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-07-20 03:56:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-20 03:56:49,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:56:49,756 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:56:49,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:56:49,968 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:56:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:56:49,968 INFO L82 PathProgramCache]: Analyzing trace with hash -928947374, now seen corresponding path program 14 times [2020-07-20 03:56:49,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:56:49,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310689472] [2020-07-20 03:56:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:56:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:56:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:56:51,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310689472] [2020-07-20 03:56:51,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848585218] [2020-07-20 03:56:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f22f78e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:10,903 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f22f78e issued 4 check-sat command(s) [2020-07-20 03:57:10,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:57:11,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 03:57:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:57:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:57:12,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:57:12,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2020-07-20 03:57:12,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770878835] [2020-07-20 03:57:12,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-20 03:57:12,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:12,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-20 03:57:12,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 03:57:12,473 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 52 states. [2020-07-20 03:57:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:14,877 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-07-20 03:57:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 03:57:14,879 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 70 [2020-07-20 03:57:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:14,880 INFO L225 Difference]: With dead ends: 100 [2020-07-20 03:57:14,880 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 03:57:14,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1566, Invalid=4440, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 03:57:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 03:57:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-20 03:57:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 03:57:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-07-20 03:57:14,886 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-07-20 03:57:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:14,886 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-07-20 03:57:14,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-20 03:57:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-07-20 03:57:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 03:57:14,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:14,887 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:57:15,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 03:57:15,099 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1030916052, now seen corresponding path program 15 times [2020-07-20 03:57:15,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:15,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607225555] [2020-07-20 03:57:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:57:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:57:17,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607225555] [2020-07-20 03:57:17,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772378003] [2020-07-20 03:57:17,282 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fd57c57 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:29,377 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fd57c57 issued 4 check-sat command(s) [2020-07-20 03:57:29,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:57:29,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 03:57:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:57:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:57:30,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:57:30,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 54 [2020-07-20 03:57:30,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215427408] [2020-07-20 03:57:30,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-20 03:57:30,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-20 03:57:30,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2020-07-20 03:57:30,735 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 54 states. [2020-07-20 03:57:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:33,010 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-07-20 03:57:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 03:57:33,011 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 72 [2020-07-20 03:57:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:33,012 INFO L225 Difference]: With dead ends: 102 [2020-07-20 03:57:33,012 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 03:57:33,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1693, Invalid=4787, Unknown=0, NotChecked=0, Total=6480 [2020-07-20 03:57:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 03:57:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-07-20 03:57:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 03:57:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-07-20 03:57:33,017 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-07-20 03:57:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:33,018 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-07-20 03:57:33,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-20 03:57:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-07-20 03:57:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-20 03:57:33,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:33,019 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:57:33,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:33,225 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1030974506, now seen corresponding path program 16 times [2020-07-20 03:57:33,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:33,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911644210] [2020-07-20 03:57:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:57:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:57:35,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911644210] [2020-07-20 03:57:35,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150421220] [2020-07-20 03:57:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f6742cf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:09,304 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f6742cf issued 4 check-sat command(s) [2020-07-20 03:58:09,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:09,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 03:58:09,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:58:11,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:11,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 56 [2020-07-20 03:58:11,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058686728] [2020-07-20 03:58:11,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-20 03:58:11,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-20 03:58:11,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=2370, Unknown=0, NotChecked=0, Total=3080 [2020-07-20 03:58:11,120 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 56 states. [2020-07-20 03:58:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:13,372 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-07-20 03:58:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 03:58:13,372 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2020-07-20 03:58:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:13,373 INFO L225 Difference]: With dead ends: 104 [2020-07-20 03:58:13,373 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 03:58:13,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1825, Invalid=5147, Unknown=0, NotChecked=0, Total=6972 [2020-07-20 03:58:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 03:58:13,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-07-20 03:58:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 03:58:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-07-20 03:58:13,378 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-07-20 03:58:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:13,378 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-07-20 03:58:13,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-20 03:58:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-07-20 03:58:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-20 03:58:13,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:13,379 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:13,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-20 03:58:13,588 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:13,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:13,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1767090008, now seen corresponding path program 17 times [2020-07-20 03:58:13,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:13,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801850801] [2020-07-20 03:58:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:58:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:58:15,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801850801] [2020-07-20 03:58:15,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484334430] [2020-07-20 03:58:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dd3beb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:29,722 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dd3beb issued 4 check-sat command(s) [2020-07-20 03:58:29,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:29,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 03:58:29,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:58:31,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:31,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 58 [2020-07-20 03:58:31,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321773329] [2020-07-20 03:58:31,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-20 03:58:31,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:31,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-20 03:58:31,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=2542, Unknown=0, NotChecked=0, Total=3306 [2020-07-20 03:58:31,640 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 58 states. [2020-07-20 03:58:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:34,257 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-07-20 03:58:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 03:58:34,258 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 76 [2020-07-20 03:58:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:34,259 INFO L225 Difference]: With dead ends: 106 [2020-07-20 03:58:34,260 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 03:58:34,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1962, Invalid=5520, Unknown=0, NotChecked=0, Total=7482 [2020-07-20 03:58:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 03:58:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-07-20 03:58:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-20 03:58:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-07-20 03:58:34,266 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-07-20 03:58:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:34,267 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-07-20 03:58:34,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-20 03:58:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-07-20 03:58:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 03:58:34,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:34,268 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:34,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-20 03:58:34,477 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2057560666, now seen corresponding path program 18 times [2020-07-20 03:58:34,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:34,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368289218] [2020-07-20 03:58:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:58:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:58:36,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368289218] [2020-07-20 03:58:36,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384392903] [2020-07-20 03:58:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a890bf3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:59:00,869 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a890bf3 issued 4 check-sat command(s) [2020-07-20 03:59:00,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:59:01,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 03:59:01,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:59:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:59:04,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:59:04,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 60 [2020-07-20 03:59:04,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596003250] [2020-07-20 03:59:04,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-20 03:59:04,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:59:04,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-20 03:59:04,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=2720, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 03:59:04,086 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 60 states. [2020-07-20 03:59:04,557 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-07-20 03:59:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:59:08,100 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-07-20 03:59:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 03:59:08,101 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 78 [2020-07-20 03:59:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:59:08,103 INFO L225 Difference]: With dead ends: 108 [2020-07-20 03:59:08,103 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 03:59:08,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2104, Invalid=5906, Unknown=0, NotChecked=0, Total=8010 [2020-07-20 03:59:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 03:59:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-07-20 03:59:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 03:59:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-07-20 03:59:08,111 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-07-20 03:59:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:59:08,111 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-07-20 03:59:08,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-20 03:59:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-07-20 03:59:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 03:59:08,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:59:08,112 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:59:08,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:59:08,325 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:59:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:59:08,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2026988764, now seen corresponding path program 19 times [2020-07-20 03:59:08,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:59:08,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507464751] [2020-07-20 03:59:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 03:59:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:59:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:59:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:59:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:59:10,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507464751] [2020-07-20 03:59:10,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443171214] [2020-07-20 03:59:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2249b1f4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:01:25,621 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2249b1f4 issued 4 check-sat command(s) [2020-07-20 04:01:25,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:01:29,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 04:01:29,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:01:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 04:01:31,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 04:01:31,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 62 [2020-07-20 04:01:31,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212768998] [2020-07-20 04:01:31,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-20 04:01:31,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:31,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-20 04:01:31,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=2904, Unknown=0, NotChecked=0, Total=3782 [2020-07-20 04:01:31,427 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 62 states. [2020-07-20 04:01:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:34,068 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-07-20 04:01:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 04:01:34,069 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 80 [2020-07-20 04:01:34,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:34,070 INFO L225 Difference]: With dead ends: 110 [2020-07-20 04:01:34,071 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 04:01:34,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2251, Invalid=6305, Unknown=0, NotChecked=0, Total=8556 [2020-07-20 04:01:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 04:01:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-07-20 04:01:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 04:01:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-07-20 04:01:34,076 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-07-20 04:01:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:34,076 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-07-20 04:01:34,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-20 04:01:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-07-20 04:01:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 04:01:34,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:34,077 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:01:34,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:01:34,282 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:34,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1582805282, now seen corresponding path program 20 times [2020-07-20 04:01:34,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:34,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118822232] [2020-07-20 04:01:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 04:01:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 04:01:36,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118822232] [2020-07-20 04:01:36,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592083644] [2020-07-20 04:01:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bbd9f9c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:02:28,693 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bbd9f9c issued 4 check-sat command(s) [2020-07-20 04:02:28,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:02:29,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 04:02:29,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:02:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 04:02:31,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 04:02:31,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 64 [2020-07-20 04:02:31,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014092946] [2020-07-20 04:02:31,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-20 04:02:31,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:02:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-20 04:02:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=938, Invalid=3094, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 04:02:31,866 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 64 states. [2020-07-20 04:02:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:02:34,729 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-07-20 04:02:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 04:02:34,730 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 82 [2020-07-20 04:02:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:02:34,732 INFO L225 Difference]: With dead ends: 112 [2020-07-20 04:02:34,732 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 04:02:34,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2403, Invalid=6717, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 04:02:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 04:02:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-07-20 04:02:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-20 04:02:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-07-20 04:02:34,739 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-07-20 04:02:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:02:34,740 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-07-20 04:02:34,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-20 04:02:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-07-20 04:02:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-20 04:02:34,741 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:02:34,741 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:02:34,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-07-20 04:02:34,953 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:02:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:02:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash -261308320, now seen corresponding path program 21 times [2020-07-20 04:02:34,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:02:34,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117522668] [2020-07-20 04:02:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 04:02:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:02:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:02:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:02:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 04:02:37,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117522668] [2020-07-20 04:02:37,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507862737] [2020-07-20 04:02:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36424c65 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:03:37,864 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36424c65 issued 4 check-sat command(s) [2020-07-20 04:03:37,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:03:39,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 04:03:39,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:03:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 04:03:41,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 04:03:41,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 66 [2020-07-20 04:03:41,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867357572] [2020-07-20 04:03:41,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-20 04:03:41,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:03:41,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-20 04:03:41,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2020-07-20 04:03:41,522 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 66 states. [2020-07-20 04:03:44,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:03:44,633 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-07-20 04:03:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 04:03:44,634 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 84 [2020-07-20 04:03:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:03:44,635 INFO L225 Difference]: With dead ends: 114 [2020-07-20 04:03:44,635 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 04:03:44,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2560, Invalid=7142, Unknown=0, NotChecked=0, Total=9702 [2020-07-20 04:03:44,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 04:03:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-07-20 04:03:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 04:03:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-07-20 04:03:44,641 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-07-20 04:03:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:03:44,642 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-07-20 04:03:44,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-20 04:03:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-07-20 04:03:44,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 04:03:44,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:03:44,643 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:03:44,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:03:44,848 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:03:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:03:44,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1613047454, now seen corresponding path program 22 times [2020-07-20 04:03:44,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:03:44,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160262718] [2020-07-20 04:03:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc1e7e8 [2020-07-20 04:03:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 04:03:47,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160262718] [2020-07-20 04:03:47,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126559506] [2020-07-20 04:03:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@448b089f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true