/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:40:57,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:40:57,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:40:57,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:40:57,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:40:57,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:40:57,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:40:57,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:40:57,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:40:57,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:40:57,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:40:57,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:40:57,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:40:57,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:40:57,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:40:57,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:40:57,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:40:57,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:40:57,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:40:57,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:40:57,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:40:57,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:40:57,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:40:57,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:40:57,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:40:57,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:40:57,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:40:57,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:40:57,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:40:57,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-19 23:40:57,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 23:40:57,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 23:40:57,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 23:40:57,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 23:40:57,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 23:40:57,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 23:40:57,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 23:40:57,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 23:40:57,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:40:57,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:40:57,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:40:57,328 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 [2020-07-19 23:40:57,363 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:40:57,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:40:57,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:40:57,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:40:57,365 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:40:57,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:40:57,367 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:40:57,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:40:57,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:40:57,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:40:57,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:40:57,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:40:57,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:40:57,368 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:40:57,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:40:57,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:40:57,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:40:57,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:40:57,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:40:57,370 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:40:57,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:40:57,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:40:57,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:40:57,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:40:57,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:40:57,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:40:57,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:40:57,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:40:57,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:40:57,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-19 23:40:57,641 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:40:57,653 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:40:57,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:40:57,657 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:40:57,658 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:40:57,658 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-19 23:40:57,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62761cb7/44059678a24048788a1fe4f59f20be94/FLAGdcefd6cbc [2020-07-19 23:40:58,107 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:40:58,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-19 23:40:58,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62761cb7/44059678a24048788a1fe4f59f20be94/FLAGdcefd6cbc [2020-07-19 23:40:58,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62761cb7/44059678a24048788a1fe4f59f20be94 [2020-07-19 23:40:58,546 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:40:58,550 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:40:58,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:40:58,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:40:58,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:40:58,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:40:58" (1/1) ... [2020-07-19 23:40:58,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e10ba91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58, skipping insertion in model container [2020-07-19 23:40:58,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:40:58" (1/1) ... [2020-07-19 23:40:58,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:40:58,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:40:58,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:40:58,733 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:40:58,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:40:58,783 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:40:58,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58 WrapperNode [2020-07-19 23:40:58,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:40:58,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:40:58,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:40:58,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:40:58,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58" (1/1) ... [2020-07-19 23:40:58,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58" (1/1) ... [2020-07-19 23:40:58,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58" (1/1) ... [2020-07-19 23:40:58,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58" (1/1) ... [2020-07-19 23:40:58,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58" (1/1) ... [2020-07-19 23:40:58,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58" (1/1) ... [2020-07-19 23:40:58,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58" (1/1) ... [2020-07-19 23:40:58,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:40:58,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:40:58,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:40:58,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:40:58,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58" (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 [2020-07-19 23:40:59,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:40:59,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:40:59,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:40:59,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:40:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:40:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:40:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:40:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:40:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 23:40:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:40:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:40:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:40:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:40:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:40:59,364 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:40:59,365 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-19 23:40:59,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:40:59 BoogieIcfgContainer [2020-07-19 23:40:59,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:40:59,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:40:59,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:40:59,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:40:59,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:40:58" (1/3) ... [2020-07-19 23:40:59,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b644d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:40:59, skipping insertion in model container [2020-07-19 23:40:59,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:58" (2/3) ... [2020-07-19 23:40:59,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b644d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:40:59, skipping insertion in model container [2020-07-19 23:40:59,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:40:59" (3/3) ... [2020-07-19 23:40:59,375 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-07-19 23:40:59,385 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:40:59,391 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:40:59,405 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:40:59,428 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:40:59,428 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:40:59,428 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:40:59,428 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:40:59,428 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:40:59,428 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:40:59,429 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:40:59,429 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:40:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-19 23:40:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:40:59,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:59,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:59,450 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:59,455 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-07-19 23:40:59,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:59,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538493504] [2020-07-19 23:40:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:40:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:59,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538493504] [2020-07-19 23:40:59,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:59,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:40:59,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118780285] [2020-07-19 23:40:59,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:40:59,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:59,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:40:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:40:59,650 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-07-19 23:40:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:59,732 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-07-19 23:40:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:40:59,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-19 23:40:59,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:59,743 INFO L225 Difference]: With dead ends: 42 [2020-07-19 23:40:59,743 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 23:40:59,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:40:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 23:40:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 23:40:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 23:40:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-19 23:40:59,781 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-07-19 23:40:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:59,781 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-19 23:40:59,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:40:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-19 23:40:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 23:40:59,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:59,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:59,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:40:59,783 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-07-19 23:40:59,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:59,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586295630] [2020-07-19 23:40:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:40:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:59,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586295630] [2020-07-19 23:40:59,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:59,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:40:59,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650118759] [2020-07-19 23:40:59,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:40:59,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:40:59,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:40:59,866 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-07-19 23:40:59,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:59,935 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-19 23:40:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:40:59,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-19 23:40:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:59,938 INFO L225 Difference]: With dead ends: 35 [2020-07-19 23:40:59,939 INFO L226 Difference]: Without dead ends: 25 [2020-07-19 23:40:59,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:40:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-19 23:40:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-07-19 23:40:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-19 23:40:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-07-19 23:40:59,948 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-07-19 23:40:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:59,949 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-07-19 23:40:59,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:40:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-07-19 23:40:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-19 23:40:59,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:59,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:59,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:40:59,951 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:59,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:59,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-07-19 23:40:59,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:59,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502254289] [2020-07-19 23:40:59,952 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:40:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:00,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502254289] [2020-07-19 23:41:00,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065477813] [2020-07-19 23:41:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@218d722c 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 [2020-07-19 23:41:00,146 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@218d722c issued 2 check-sat command(s) [2020-07-19 23:41:00,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:00,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 23:41:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:00,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:00,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-19 23:41:00,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460195199] [2020-07-19 23:41:00,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:41:00,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:00,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:41:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:41:00,246 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-07-19 23:41:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:00,325 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-07-19 23:41:00,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:41:00,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-19 23:41:00,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:00,327 INFO L225 Difference]: With dead ends: 45 [2020-07-19 23:41:00,327 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 23:41:00,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:41:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 23:41:00,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-19 23:41:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-19 23:41:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-19 23:41:00,336 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-07-19 23:41:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:00,336 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-19 23:41:00,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:41:00,337 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-19 23:41:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 23:41:00,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:00,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:00,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:41:00,554 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:00,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1185071985, now seen corresponding path program 2 times [2020-07-19 23:41:00,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:00,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765951767] [2020-07-19 23:41:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:00,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765951767] [2020-07-19 23:41:00,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948303271] [2020-07-19 23:41:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364941a6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:00,717 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@364941a6 issued 2 check-sat command(s) [2020-07-19 23:41:00,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:00,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 23:41:00,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:00,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:00,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-19 23:41:00,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982549888] [2020-07-19 23:41:00,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:41:00,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:00,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:41:00,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:41:00,739 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-07-19 23:41:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:00,822 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-07-19 23:41:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:41:00,823 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-19 23:41:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:00,824 INFO L225 Difference]: With dead ends: 56 [2020-07-19 23:41:00,824 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 23:41:00,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:41:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 23:41:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-07-19 23:41:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-19 23:41:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-19 23:41:00,832 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-07-19 23:41:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:00,833 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-19 23:41:00,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:41:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-19 23:41:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 23:41:00,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:00,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:01,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:01,049 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash 885408339, now seen corresponding path program 3 times [2020-07-19 23:41:01,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:01,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955988883] [2020-07-19 23:41:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:01,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955988883] [2020-07-19 23:41:01,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119550628] [2020-07-19 23:41:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14ac631d 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 [2020-07-19 23:41:01,161 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14ac631d issued 3 check-sat command(s) [2020-07-19 23:41:01,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:01,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 23:41:01,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:01,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:01,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-19 23:41:01,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849168375] [2020-07-19 23:41:01,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:41:01,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:01,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:41:01,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:41:01,179 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 8 states. [2020-07-19 23:41:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:01,272 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-07-19 23:41:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:41:01,273 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-19 23:41:01,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:01,274 INFO L225 Difference]: With dead ends: 67 [2020-07-19 23:41:01,274 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 23:41:01,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:41:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 23:41:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-19 23:41:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-19 23:41:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-07-19 23:41:01,282 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2020-07-19 23:41:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:01,282 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-07-19 23:41:01,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:41:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-19 23:41:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 23:41:01,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:01,284 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:01,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:01,485 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:01,485 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 4 times [2020-07-19 23:41:01,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:01,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307718744] [2020-07-19 23:41:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 23:41:01,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307718744] [2020-07-19 23:41:01,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:41:01,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 23:41:01,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975923798] [2020-07-19 23:41:01,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:41:01,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:01,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:41:01,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:41:01,574 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-07-19 23:41:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:01,653 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-19 23:41:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:41:01,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-19 23:41:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:01,655 INFO L225 Difference]: With dead ends: 45 [2020-07-19 23:41:01,655 INFO L226 Difference]: Without dead ends: 40 [2020-07-19 23:41:01,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:41:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-19 23:41:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-19 23:41:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-19 23:41:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-19 23:41:01,663 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2020-07-19 23:41:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:01,663 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-19 23:41:01,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:41:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-19 23:41:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 23:41:01,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:01,665 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:01,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 23:41:01,665 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065724, now seen corresponding path program 1 times [2020-07-19 23:41:01,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:01,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726921810] [2020-07-19 23:41:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:01,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726921810] [2020-07-19 23:41:01,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973357647] [2020-07-19 23:41:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56e3d86a 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 [2020-07-19 23:41:01,780 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56e3d86a issued 2 check-sat command(s) [2020-07-19 23:41:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:01,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:41:01,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:01,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:01,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-19 23:41:01,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989562568] [2020-07-19 23:41:01,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:41:01,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:01,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:41:01,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:41:01,802 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 9 states. [2020-07-19 23:41:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:01,904 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-07-19 23:41:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:41:01,904 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-19 23:41:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:01,905 INFO L225 Difference]: With dead ends: 77 [2020-07-19 23:41:01,906 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 23:41:01,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:41:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 23:41:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-19 23:41:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-19 23:41:01,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-07-19 23:41:01,914 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2020-07-19 23:41:01,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:01,914 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-07-19 23:41:01,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:41:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-07-19 23:41:01,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:41:01,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:01,916 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:02,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:02,130 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:02,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:02,131 INFO L82 PathProgramCache]: Analyzing trace with hash 359446174, now seen corresponding path program 2 times [2020-07-19 23:41:02,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:02,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177374431] [2020-07-19 23:41:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:02,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177374431] [2020-07-19 23:41:02,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441605962] [2020-07-19 23:41:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c26bb54 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:02,282 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c26bb54 issued 3 check-sat command(s) [2020-07-19 23:41:02,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:02,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 23:41:02,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:02,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:02,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-19 23:41:02,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328913929] [2020-07-19 23:41:02,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:41:02,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:02,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:41:02,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:41:02,307 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 10 states. [2020-07-19 23:41:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:02,406 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-07-19 23:41:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:41:02,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-19 23:41:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:02,408 INFO L225 Difference]: With dead ends: 88 [2020-07-19 23:41:02,408 INFO L226 Difference]: Without dead ends: 59 [2020-07-19 23:41:02,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:41:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-19 23:41:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-07-19 23:41:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-19 23:41:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-07-19 23:41:02,415 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2020-07-19 23:41:02,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:02,416 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-07-19 23:41:02,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:41:02,416 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-07-19 23:41:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 23:41:02,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:02,417 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:02,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:02,632 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:02,632 INFO L82 PathProgramCache]: Analyzing trace with hash -172981504, now seen corresponding path program 3 times [2020-07-19 23:41:02,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:02,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173305046] [2020-07-19 23:41:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:02,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173305046] [2020-07-19 23:41:02,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803030450] [2020-07-19 23:41:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@618e3c6c 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 [2020-07-19 23:41:02,774 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@618e3c6c issued 3 check-sat command(s) [2020-07-19 23:41:02,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:41:02,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:02,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:02,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-19 23:41:02,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809669758] [2020-07-19 23:41:02,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:41:02,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:02,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:41:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:41:02,811 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 11 states. [2020-07-19 23:41:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:02,931 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-07-19 23:41:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:41:02,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-19 23:41:02,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:02,933 INFO L225 Difference]: With dead ends: 99 [2020-07-19 23:41:02,934 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 23:41:02,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:41:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 23:41:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-07-19 23:41:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-19 23:41:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-07-19 23:41:02,941 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2020-07-19 23:41:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:02,942 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-07-19 23:41:02,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:41:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-07-19 23:41:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 23:41:02,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:02,943 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:03,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:03,159 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash -734871838, now seen corresponding path program 4 times [2020-07-19 23:41:03,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:03,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791522001] [2020-07-19 23:41:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:03,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791522001] [2020-07-19 23:41:03,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697324495] [2020-07-19 23:41:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8caca2d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:03,340 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8caca2d issued 3 check-sat command(s) [2020-07-19 23:41:03,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:03,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 23:41:03,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:03,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:03,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-19 23:41:03,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981846173] [2020-07-19 23:41:03,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:41:03,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:03,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:41:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:41:03,367 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 12 states. [2020-07-19 23:41:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:03,493 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-07-19 23:41:03,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:41:03,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-19 23:41:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:03,495 INFO L225 Difference]: With dead ends: 110 [2020-07-19 23:41:03,495 INFO L226 Difference]: Without dead ends: 73 [2020-07-19 23:41:03,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:41:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-19 23:41:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-07-19 23:41:03,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-19 23:41:03,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-07-19 23:41:03,503 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 32 [2020-07-19 23:41:03,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:03,510 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-07-19 23:41:03,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:41:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-07-19 23:41:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 23:41:03,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:03,512 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:03,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 23:41:03,713 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:03,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:03,714 INFO L82 PathProgramCache]: Analyzing trace with hash 454396484, now seen corresponding path program 5 times [2020-07-19 23:41:03,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:03,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339136111] [2020-07-19 23:41:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:03,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339136111] [2020-07-19 23:41:03,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057585191] [2020-07-19 23:41:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f3d64c6 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 [2020-07-19 23:41:03,939 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f3d64c6 issued 3 check-sat command(s) [2020-07-19 23:41:03,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:03,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:41:03,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:03,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:03,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-07-19 23:41:03,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010862209] [2020-07-19 23:41:03,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:41:03,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:41:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:41:03,961 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 13 states. [2020-07-19 23:41:04,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:04,083 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-07-19 23:41:04,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:41:04,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-07-19 23:41:04,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:04,084 INFO L225 Difference]: With dead ends: 121 [2020-07-19 23:41:04,085 INFO L226 Difference]: Without dead ends: 80 [2020-07-19 23:41:04,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:41:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-19 23:41:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-07-19 23:41:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-19 23:41:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-07-19 23:41:04,102 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-07-19 23:41:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:04,102 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-07-19 23:41:04,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:41:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-07-19 23:41:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 23:41:04,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:04,111 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:04,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-19 23:41:04,312 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:04,312 INFO L82 PathProgramCache]: Analyzing trace with hash 879953190, now seen corresponding path program 6 times [2020-07-19 23:41:04,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:04,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862750326] [2020-07-19 23:41:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:04,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862750326] [2020-07-19 23:41:04,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701132565] [2020-07-19 23:41:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14d9662b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:04,529 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14d9662b issued 3 check-sat command(s) [2020-07-19 23:41:04,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:04,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 23:41:04,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:04,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:04,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-07-19 23:41:04,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069113197] [2020-07-19 23:41:04,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:41:04,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:41:04,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:41:04,561 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 14 states. [2020-07-19 23:41:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:04,714 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-07-19 23:41:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:41:04,715 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-07-19 23:41:04,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:04,716 INFO L225 Difference]: With dead ends: 132 [2020-07-19 23:41:04,716 INFO L226 Difference]: Without dead ends: 87 [2020-07-19 23:41:04,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:41:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-19 23:41:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-07-19 23:41:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-19 23:41:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-07-19 23:41:04,726 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-07-19 23:41:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:04,726 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-07-19 23:41:04,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:41:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-07-19 23:41:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 23:41:04,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:04,727 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:04,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:04,941 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1818054536, now seen corresponding path program 7 times [2020-07-19 23:41:04,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:04,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94185894] [2020-07-19 23:41:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:05,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94185894] [2020-07-19 23:41:05,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866134046] [2020-07-19 23:41:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32f00876 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 [2020-07-19 23:41:05,203 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@32f00876 issued 3 check-sat command(s) [2020-07-19 23:41:05,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:05,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:41:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:05,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:05,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-07-19 23:41:05,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796520784] [2020-07-19 23:41:05,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:41:05,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:05,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:41:05,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:41:05,236 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 15 states. [2020-07-19 23:41:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:05,393 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-07-19 23:41:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:41:05,393 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-07-19 23:41:05,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:05,394 INFO L225 Difference]: With dead ends: 143 [2020-07-19 23:41:05,394 INFO L226 Difference]: Without dead ends: 94 [2020-07-19 23:41:05,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:41:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-19 23:41:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-07-19 23:41:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-19 23:41:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-07-19 23:41:05,401 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 38 [2020-07-19 23:41:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:05,402 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-07-19 23:41:05,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:41:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-07-19 23:41:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 23:41:05,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:05,403 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:05,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:05,604 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:05,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:05,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1390315882, now seen corresponding path program 8 times [2020-07-19 23:41:05,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:05,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364486096] [2020-07-19 23:41:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:05,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364486096] [2020-07-19 23:41:05,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752084437] [2020-07-19 23:41:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49203452 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:05,844 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49203452 issued 3 check-sat command(s) [2020-07-19 23:41:05,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:05,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 23:41:05,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:05,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:05,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-07-19 23:41:05,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787620507] [2020-07-19 23:41:05,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:41:05,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:41:05,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:41:05,873 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 16 states. [2020-07-19 23:41:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:06,045 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-07-19 23:41:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:41:06,046 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-07-19 23:41:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:06,047 INFO L225 Difference]: With dead ends: 154 [2020-07-19 23:41:06,047 INFO L226 Difference]: Without dead ends: 101 [2020-07-19 23:41:06,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:41:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-19 23:41:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-07-19 23:41:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-19 23:41:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-07-19 23:41:06,056 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 40 [2020-07-19 23:41:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:06,056 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-07-19 23:41:06,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:41:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-07-19 23:41:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-19 23:41:06,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:06,057 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:06,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 23:41:06,271 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:06,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:06,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1644637492, now seen corresponding path program 9 times [2020-07-19 23:41:06,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:06,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145489805] [2020-07-19 23:41:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-19 23:41:06,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145489805] [2020-07-19 23:41:06,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269933600] [2020-07-19 23:41:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bcaf054 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 [2020-07-19 23:41:06,523 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bcaf054 issued 3 check-sat command(s) [2020-07-19 23:41:06,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 23:41:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:41:06,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:06,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 19 [2020-07-19 23:41:06,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446337480] [2020-07-19 23:41:06,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:41:06,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:06,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:41:06,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:41:06,692 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 19 states. [2020-07-19 23:41:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:06,921 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2020-07-19 23:41:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:41:06,922 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-07-19 23:41:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:06,923 INFO L225 Difference]: With dead ends: 167 [2020-07-19 23:41:06,923 INFO L226 Difference]: Without dead ends: 96 [2020-07-19 23:41:06,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:41:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-19 23:41:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-07-19 23:41:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-19 23:41:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-07-19 23:41:06,932 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 42 [2020-07-19 23:41:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:06,933 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-07-19 23:41:06,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:41:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-07-19 23:41:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-19 23:41:06,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:06,940 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:07,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 23:41:07,160 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash 961768194, now seen corresponding path program 10 times [2020-07-19 23:41:07,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:07,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078348328] [2020-07-19 23:41:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:07,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078348328] [2020-07-19 23:41:07,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518289065] [2020-07-19 23:41:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5bb8930d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:07,597 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5bb8930d issued 2 check-sat command(s) [2020-07-19 23:41:07,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:07,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 23:41:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:07,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:07,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-07-19 23:41:07,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982347911] [2020-07-19 23:41:07,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:41:07,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:07,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:41:07,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:41:07,651 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 18 states. [2020-07-19 23:41:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:07,807 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2020-07-19 23:41:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:41:07,807 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 92 [2020-07-19 23:41:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:07,808 INFO L225 Difference]: With dead ends: 164 [2020-07-19 23:41:07,808 INFO L226 Difference]: Without dead ends: 103 [2020-07-19 23:41:07,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:41:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-19 23:41:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2020-07-19 23:41:07,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-19 23:41:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-07-19 23:41:07,816 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 92 [2020-07-19 23:41:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:07,817 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-07-19 23:41:07,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:41:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-07-19 23:41:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-19 23:41:07,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:07,821 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:08,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 23:41:08,035 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:08,035 INFO L82 PathProgramCache]: Analyzing trace with hash -662493340, now seen corresponding path program 11 times [2020-07-19 23:41:08,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:08,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031711502] [2020-07-19 23:41:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:08,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031711502] [2020-07-19 23:41:08,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028372260] [2020-07-19 23:41:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1da4e53c 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 [2020-07-19 23:41:08,391 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1da4e53c issued 2 check-sat command(s) [2020-07-19 23:41:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:08,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 23:41:08,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:08,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:08,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-07-19 23:41:08,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190986715] [2020-07-19 23:41:08,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:41:08,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:08,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:41:08,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:41:08,420 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 19 states. [2020-07-19 23:41:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:08,572 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2020-07-19 23:41:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:41:08,573 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-07-19 23:41:08,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:08,573 INFO L225 Difference]: With dead ends: 175 [2020-07-19 23:41:08,574 INFO L226 Difference]: Without dead ends: 110 [2020-07-19 23:41:08,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:41:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-19 23:41:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2020-07-19 23:41:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-19 23:41:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-07-19 23:41:08,580 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 94 [2020-07-19 23:41:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:08,581 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-07-19 23:41:08,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:41:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-07-19 23:41:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-19 23:41:08,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:08,582 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:08,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:08,790 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:08,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:08,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1790268230, now seen corresponding path program 12 times [2020-07-19 23:41:08,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:08,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839557925] [2020-07-19 23:41:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:09,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839557925] [2020-07-19 23:41:09,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979118188] [2020-07-19 23:41:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@90dcf11 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:09,385 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@90dcf11 issued 2 check-sat command(s) [2020-07-19 23:41:09,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:09,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 23:41:09,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:09,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:09,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-07-19 23:41:09,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569756457] [2020-07-19 23:41:09,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:41:09,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:09,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:41:09,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:41:09,413 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 20 states. [2020-07-19 23:41:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:09,600 INFO L93 Difference]: Finished difference Result 186 states and 196 transitions. [2020-07-19 23:41:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:41:09,601 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 96 [2020-07-19 23:41:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:09,602 INFO L225 Difference]: With dead ends: 186 [2020-07-19 23:41:09,602 INFO L226 Difference]: Without dead ends: 117 [2020-07-19 23:41:09,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:41:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-19 23:41:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-07-19 23:41:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-19 23:41:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2020-07-19 23:41:09,607 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 96 [2020-07-19 23:41:09,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:09,608 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2020-07-19 23:41:09,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:41:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2020-07-19 23:41:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-19 23:41:09,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:09,609 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:09,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 23:41:09,821 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:09,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash 957091496, now seen corresponding path program 13 times [2020-07-19 23:41:09,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:09,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113555547] [2020-07-19 23:41:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:10,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113555547] [2020-07-19 23:41:10,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568410077] [2020-07-19 23:41:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6839fb8 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 [2020-07-19 23:41:10,758 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6839fb8 issued 2 check-sat command(s) [2020-07-19 23:41:10,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 23:41:10,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:10,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:10,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-07-19 23:41:10,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037739297] [2020-07-19 23:41:10,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 23:41:10,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:10,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 23:41:10,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:41:10,788 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand 21 states. [2020-07-19 23:41:10,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:10,991 INFO L93 Difference]: Finished difference Result 197 states and 209 transitions. [2020-07-19 23:41:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:41:10,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-07-19 23:41:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:10,994 INFO L225 Difference]: With dead ends: 197 [2020-07-19 23:41:10,994 INFO L226 Difference]: Without dead ends: 124 [2020-07-19 23:41:10,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:41:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-19 23:41:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2020-07-19 23:41:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-19 23:41:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-07-19 23:41:11,000 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 98 [2020-07-19 23:41:11,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:11,001 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-07-19 23:41:11,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 23:41:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-07-19 23:41:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-19 23:41:11,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:11,002 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:11,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:11,203 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:11,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash -861832822, now seen corresponding path program 14 times [2020-07-19 23:41:11,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:11,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769001861] [2020-07-19 23:41:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:11,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769001861] [2020-07-19 23:41:11,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351213779] [2020-07-19 23:41:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6cb7745b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:13,220 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6cb7745b issued 3 check-sat command(s) [2020-07-19 23:41:13,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:13,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 23:41:13,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:13,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:13,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-07-19 23:41:13,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61879283] [2020-07-19 23:41:13,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 23:41:13,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:13,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 23:41:13,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:41:13,266 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 22 states. [2020-07-19 23:41:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:13,488 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2020-07-19 23:41:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 23:41:13,489 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2020-07-19 23:41:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:13,490 INFO L225 Difference]: With dead ends: 208 [2020-07-19 23:41:13,490 INFO L226 Difference]: Without dead ends: 131 [2020-07-19 23:41:13,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:41:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-19 23:41:13,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2020-07-19 23:41:13,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-19 23:41:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-07-19 23:41:13,496 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 100 [2020-07-19 23:41:13,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:13,496 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-07-19 23:41:13,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 23:41:13,496 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-07-19 23:41:13,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-19 23:41:13,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:13,497 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:13,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:13,711 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:13,711 INFO L82 PathProgramCache]: Analyzing trace with hash -796412948, now seen corresponding path program 15 times [2020-07-19 23:41:13,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:13,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320422535] [2020-07-19 23:41:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:13,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320422535] [2020-07-19 23:41:13,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407732894] [2020-07-19 23:41:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@171f61b5 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 [2020-07-19 23:41:15,274 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@171f61b5 issued 3 check-sat command(s) [2020-07-19 23:41:15,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:15,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 23:41:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:15,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:15,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-07-19 23:41:15,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963050431] [2020-07-19 23:41:15,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 23:41:15,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:15,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 23:41:15,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:41:15,324 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 23 states. [2020-07-19 23:41:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:15,537 INFO L93 Difference]: Finished difference Result 219 states and 235 transitions. [2020-07-19 23:41:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 23:41:15,538 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 102 [2020-07-19 23:41:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:15,539 INFO L225 Difference]: With dead ends: 219 [2020-07-19 23:41:15,540 INFO L226 Difference]: Without dead ends: 138 [2020-07-19 23:41:15,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:41:15,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-19 23:41:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-07-19 23:41:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-19 23:41:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2020-07-19 23:41:15,556 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 102 [2020-07-19 23:41:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:15,558 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2020-07-19 23:41:15,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 23:41:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2020-07-19 23:41:15,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-19 23:41:15,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:15,560 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:15,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-19 23:41:15,773 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1942543822, now seen corresponding path program 16 times [2020-07-19 23:41:15,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:15,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989701340] [2020-07-19 23:41:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:16,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989701340] [2020-07-19 23:41:16,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150934012] [2020-07-19 23:41:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15fe31da No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:17,538 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15fe31da issued 3 check-sat command(s) [2020-07-19 23:41:17,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:17,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 23:41:17,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:17,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:17,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-07-19 23:41:17,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727224543] [2020-07-19 23:41:17,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 23:41:17,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:17,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 23:41:17,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:41:17,574 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 24 states. [2020-07-19 23:41:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:17,785 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2020-07-19 23:41:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 23:41:17,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 104 [2020-07-19 23:41:17,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:17,789 INFO L225 Difference]: With dead ends: 230 [2020-07-19 23:41:17,789 INFO L226 Difference]: Without dead ends: 145 [2020-07-19 23:41:17,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:41:17,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-19 23:41:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2020-07-19 23:41:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-19 23:41:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-07-19 23:41:17,795 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 104 [2020-07-19 23:41:17,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:17,795 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-07-19 23:41:17,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 23:41:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-07-19 23:41:17,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-19 23:41:17,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:17,796 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:18,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:18,007 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:18,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1265047344, now seen corresponding path program 17 times [2020-07-19 23:41:18,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:18,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496480775] [2020-07-19 23:41:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:18,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496480775] [2020-07-19 23:41:18,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772271348] [2020-07-19 23:41:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d58256f 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 [2020-07-19 23:41:19,542 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d58256f issued 3 check-sat command(s) [2020-07-19 23:41:19,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:19,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 23:41:19,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:19,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:19,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2020-07-19 23:41:19,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776271376] [2020-07-19 23:41:19,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 23:41:19,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 23:41:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:41:19,582 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand 25 states. [2020-07-19 23:41:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:19,811 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2020-07-19 23:41:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 23:41:19,814 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 106 [2020-07-19 23:41:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:19,815 INFO L225 Difference]: With dead ends: 241 [2020-07-19 23:41:19,816 INFO L226 Difference]: Without dead ends: 152 [2020-07-19 23:41:19,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:41:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-19 23:41:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 142. [2020-07-19 23:41:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-19 23:41:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2020-07-19 23:41:19,821 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 106 [2020-07-19 23:41:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:19,821 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2020-07-19 23:41:19,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 23:41:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2020-07-19 23:41:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-19 23:41:19,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:19,823 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:20,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-19 23:41:20,030 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:20,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1269006318, now seen corresponding path program 18 times [2020-07-19 23:41:20,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:20,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353150071] [2020-07-19 23:41:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:20,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353150071] [2020-07-19 23:41:20,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390943823] [2020-07-19 23:41:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6ec62ec0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:21,771 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6ec62ec0 issued 3 check-sat command(s) [2020-07-19 23:41:21,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:21,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-19 23:41:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:21,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:21,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2020-07-19 23:41:21,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835822924] [2020-07-19 23:41:21,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 23:41:21,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:21,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 23:41:21,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-19 23:41:21,812 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 26 states. [2020-07-19 23:41:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:22,044 INFO L93 Difference]: Finished difference Result 252 states and 274 transitions. [2020-07-19 23:41:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 23:41:22,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 108 [2020-07-19 23:41:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:22,046 INFO L225 Difference]: With dead ends: 252 [2020-07-19 23:41:22,046 INFO L226 Difference]: Without dead ends: 159 [2020-07-19 23:41:22,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-19 23:41:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-19 23:41:22,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2020-07-19 23:41:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-19 23:41:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 159 transitions. [2020-07-19 23:41:22,053 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 159 transitions. Word has length 108 [2020-07-19 23:41:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:22,053 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 159 transitions. [2020-07-19 23:41:22,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 23:41:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 159 transitions. [2020-07-19 23:41:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-19 23:41:22,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:22,055 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:22,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-19 23:41:22,267 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1248118668, now seen corresponding path program 19 times [2020-07-19 23:41:22,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:22,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196127357] [2020-07-19 23:41:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:22,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196127357] [2020-07-19 23:41:22,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811849807] [2020-07-19 23:41:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23e4279e 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 [2020-07-19 23:41:24,450 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23e4279e issued 3 check-sat command(s) [2020-07-19 23:41:24,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:24,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 23:41:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:24,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:24,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2020-07-19 23:41:24,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796762516] [2020-07-19 23:41:24,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 23:41:24,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 23:41:24,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:41:24,514 INFO L87 Difference]: Start difference. First operand 148 states and 159 transitions. Second operand 27 states. [2020-07-19 23:41:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:24,785 INFO L93 Difference]: Finished difference Result 263 states and 287 transitions. [2020-07-19 23:41:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 23:41:24,786 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 110 [2020-07-19 23:41:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:24,787 INFO L225 Difference]: With dead ends: 263 [2020-07-19 23:41:24,787 INFO L226 Difference]: Without dead ends: 166 [2020-07-19 23:41:24,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:41:24,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-19 23:41:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2020-07-19 23:41:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-19 23:41:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 166 transitions. [2020-07-19 23:41:24,793 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 166 transitions. Word has length 110 [2020-07-19 23:41:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:24,793 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 166 transitions. [2020-07-19 23:41:24,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 23:41:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 166 transitions. [2020-07-19 23:41:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-07-19 23:41:24,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:24,794 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:25,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:25,008 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:25,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:25,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1645043798, now seen corresponding path program 20 times [2020-07-19 23:41:25,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:25,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229563059] [2020-07-19 23:41:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:25,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229563059] [2020-07-19 23:41:25,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672051681] [2020-07-19 23:41:25,330 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b32cf48 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:27,340 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b32cf48 issued 3 check-sat command(s) [2020-07-19 23:41:27,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:27,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 23:41:27,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:27,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:27,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2020-07-19 23:41:27,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522193101] [2020-07-19 23:41:27,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 23:41:27,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:27,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 23:41:27,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:41:27,402 INFO L87 Difference]: Start difference. First operand 154 states and 166 transitions. Second operand 28 states. [2020-07-19 23:41:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:27,716 INFO L93 Difference]: Finished difference Result 274 states and 300 transitions. [2020-07-19 23:41:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 23:41:27,717 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2020-07-19 23:41:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:27,719 INFO L225 Difference]: With dead ends: 274 [2020-07-19 23:41:27,719 INFO L226 Difference]: Without dead ends: 173 [2020-07-19 23:41:27,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:41:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-19 23:41:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2020-07-19 23:41:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-19 23:41:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-07-19 23:41:27,728 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 112 [2020-07-19 23:41:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:27,728 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-07-19 23:41:27,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 23:41:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-07-19 23:41:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-19 23:41:27,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:27,730 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:27,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-19 23:41:27,943 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:27,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1164634184, now seen corresponding path program 21 times [2020-07-19 23:41:27,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:27,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256148203] [2020-07-19 23:41:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:28,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256148203] [2020-07-19 23:41:28,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607161708] [2020-07-19 23:41:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39ec521a 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 [2020-07-19 23:41:31,190 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39ec521a issued 3 check-sat command(s) [2020-07-19 23:41:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:31,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 23:41:31,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:31,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:31,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2020-07-19 23:41:31,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865246944] [2020-07-19 23:41:31,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-19 23:41:31,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:31,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-19 23:41:31,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:41:31,238 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 29 states. [2020-07-19 23:41:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:31,573 INFO L93 Difference]: Finished difference Result 285 states and 313 transitions. [2020-07-19 23:41:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 23:41:31,574 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 114 [2020-07-19 23:41:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:31,576 INFO L225 Difference]: With dead ends: 285 [2020-07-19 23:41:31,576 INFO L226 Difference]: Without dead ends: 180 [2020-07-19 23:41:31,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:41:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-19 23:41:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2020-07-19 23:41:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-19 23:41:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 180 transitions. [2020-07-19 23:41:31,582 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 180 transitions. Word has length 114 [2020-07-19 23:41:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:31,582 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 180 transitions. [2020-07-19 23:41:31,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-19 23:41:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 180 transitions. [2020-07-19 23:41:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-19 23:41:31,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:31,583 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:31,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:31,796 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash 269254298, now seen corresponding path program 22 times [2020-07-19 23:41:31,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:31,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49057496] [2020-07-19 23:41:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:32,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49057496] [2020-07-19 23:41:32,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356748143] [2020-07-19 23:41:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a920f9c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:37,859 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a920f9c issued 3 check-sat command(s) [2020-07-19 23:41:37,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:37,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 23:41:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:37,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:37,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2020-07-19 23:41:37,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473485616] [2020-07-19 23:41:37,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 23:41:37,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:37,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 23:41:37,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:41:37,942 INFO L87 Difference]: Start difference. First operand 166 states and 180 transitions. Second operand 30 states. [2020-07-19 23:41:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:38,323 INFO L93 Difference]: Finished difference Result 296 states and 326 transitions. [2020-07-19 23:41:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-19 23:41:38,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-07-19 23:41:38,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:38,325 INFO L225 Difference]: With dead ends: 296 [2020-07-19 23:41:38,325 INFO L226 Difference]: Without dead ends: 187 [2020-07-19 23:41:38,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:41:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-19 23:41:38,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 172. [2020-07-19 23:41:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-19 23:41:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2020-07-19 23:41:38,331 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 116 [2020-07-19 23:41:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:38,331 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2020-07-19 23:41:38,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 23:41:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2020-07-19 23:41:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-19 23:41:38,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:38,333 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:38,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-19 23:41:38,547 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:38,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:38,548 INFO L82 PathProgramCache]: Analyzing trace with hash -448416516, now seen corresponding path program 23 times [2020-07-19 23:41:38,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:38,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369432280] [2020-07-19 23:41:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:39,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369432280] [2020-07-19 23:41:39,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948327088] [2020-07-19 23:41:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e46cbd 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 [2020-07-19 23:41:44,543 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e46cbd issued 3 check-sat command(s) [2020-07-19 23:41:44,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:44,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 23:41:44,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:44,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:44,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2020-07-19 23:41:44,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756726931] [2020-07-19 23:41:44,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-19 23:41:44,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-19 23:41:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:41:44,606 INFO L87 Difference]: Start difference. First operand 172 states and 187 transitions. Second operand 31 states. [2020-07-19 23:41:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:44,990 INFO L93 Difference]: Finished difference Result 307 states and 339 transitions. [2020-07-19 23:41:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 23:41:44,992 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2020-07-19 23:41:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:44,993 INFO L225 Difference]: With dead ends: 307 [2020-07-19 23:41:44,993 INFO L226 Difference]: Without dead ends: 194 [2020-07-19 23:41:44,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:41:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-19 23:41:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 178. [2020-07-19 23:41:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-19 23:41:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 194 transitions. [2020-07-19 23:41:45,003 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 194 transitions. Word has length 118 [2020-07-19 23:41:45,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:45,003 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 194 transitions. [2020-07-19 23:41:45,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-19 23:41:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 194 transitions. [2020-07-19 23:41:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-19 23:41:45,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:45,005 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:45,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-19 23:41:45,206 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:45,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1359665886, now seen corresponding path program 24 times [2020-07-19 23:41:45,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:45,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850374906] [2020-07-19 23:41:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:45,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850374906] [2020-07-19 23:41:45,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336392902] [2020-07-19 23:41:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@21a2bdef No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:50,916 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@21a2bdef issued 3 check-sat command(s) [2020-07-19 23:41:50,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:50,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-19 23:41:50,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:50,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:50,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2020-07-19 23:41:50,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119553933] [2020-07-19 23:41:50,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-19 23:41:50,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-19 23:41:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-19 23:41:50,989 INFO L87 Difference]: Start difference. First operand 178 states and 194 transitions. Second operand 32 states. [2020-07-19 23:41:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:51,362 INFO L93 Difference]: Finished difference Result 318 states and 352 transitions. [2020-07-19 23:41:51,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 23:41:51,362 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 120 [2020-07-19 23:41:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:51,363 INFO L225 Difference]: With dead ends: 318 [2020-07-19 23:41:51,363 INFO L226 Difference]: Without dead ends: 201 [2020-07-19 23:41:51,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-19 23:41:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-19 23:41:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2020-07-19 23:41:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-19 23:41:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 201 transitions. [2020-07-19 23:41:51,371 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 201 transitions. Word has length 120 [2020-07-19 23:41:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:51,371 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 201 transitions. [2020-07-19 23:41:51,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-19 23:41:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 201 transitions. [2020-07-19 23:41:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-19 23:41:51,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:51,373 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:51,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:51,587 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:51,588 INFO L82 PathProgramCache]: Analyzing trace with hash -534900672, now seen corresponding path program 25 times [2020-07-19 23:41:51,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:51,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991838583] [2020-07-19 23:41:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:41:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:41:52,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991838583] [2020-07-19 23:41:52,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089076744] [2020-07-19 23:41:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1225db2b 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 [2020-07-19 23:42:09,430 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1225db2b issued 3 check-sat command(s) [2020-07-19 23:42:09,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:42:09,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 23:42:09,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:42:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:42:09,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:42:09,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2020-07-19 23:42:09,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249155959] [2020-07-19 23:42:09,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-19 23:42:09,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:42:09,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-19 23:42:09,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:42:09,636 INFO L87 Difference]: Start difference. First operand 184 states and 201 transitions. Second operand 33 states. [2020-07-19 23:42:09,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:42:09,997 INFO L93 Difference]: Finished difference Result 329 states and 365 transitions. [2020-07-19 23:42:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-19 23:42:09,998 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2020-07-19 23:42:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:42:10,000 INFO L225 Difference]: With dead ends: 329 [2020-07-19 23:42:10,000 INFO L226 Difference]: Without dead ends: 208 [2020-07-19 23:42:10,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:42:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-19 23:42:10,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2020-07-19 23:42:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-19 23:42:10,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 208 transitions. [2020-07-19 23:42:10,007 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 208 transitions. Word has length 122 [2020-07-19 23:42:10,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:42:10,008 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 208 transitions. [2020-07-19 23:42:10,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-19 23:42:10,008 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 208 transitions. [2020-07-19 23:42:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-19 23:42:10,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:42:10,009 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:42:10,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:42:10,210 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:42:10,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:42:10,210 INFO L82 PathProgramCache]: Analyzing trace with hash -147229406, now seen corresponding path program 26 times [2020-07-19 23:42:10,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:42:10,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531550528] [2020-07-19 23:42:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:42:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:42:10,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531550528] [2020-07-19 23:42:10,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559091219] [2020-07-19 23:42:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29ea2181 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:42:14,121 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29ea2181 issued 3 check-sat command(s) [2020-07-19 23:42:14,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:42:14,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-19 23:42:14,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:42:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:42:14,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:42:14,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2020-07-19 23:42:14,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911430106] [2020-07-19 23:42:14,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-19 23:42:14,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:42:14,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-19 23:42:14,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 23:42:14,177 INFO L87 Difference]: Start difference. First operand 190 states and 208 transitions. Second operand 34 states. [2020-07-19 23:42:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:42:14,534 INFO L93 Difference]: Finished difference Result 340 states and 378 transitions. [2020-07-19 23:42:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-19 23:42:14,535 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 124 [2020-07-19 23:42:14,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:42:14,537 INFO L225 Difference]: With dead ends: 340 [2020-07-19 23:42:14,537 INFO L226 Difference]: Without dead ends: 215 [2020-07-19 23:42:14,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 23:42:14,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-19 23:42:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2020-07-19 23:42:14,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-19 23:42:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 215 transitions. [2020-07-19 23:42:14,552 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 215 transitions. Word has length 124 [2020-07-19 23:42:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:42:14,552 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 215 transitions. [2020-07-19 23:42:14,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-19 23:42:14,553 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 215 transitions. [2020-07-19 23:42:14,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-19 23:42:14,554 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:42:14,554 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:42:14,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-07-19 23:42:14,768 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:42:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:42:14,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1257297532, now seen corresponding path program 27 times [2020-07-19 23:42:14,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:42:14,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078118270] [2020-07-19 23:42:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:42:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:42:15,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078118270] [2020-07-19 23:42:15,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392696877] [2020-07-19 23:42:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a2105ee 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 [2020-07-19 23:42:21,478 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a2105ee issued 3 check-sat command(s) [2020-07-19 23:42:21,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:42:21,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 23:42:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:42:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:42:21,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:42:21,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2020-07-19 23:42:21,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117428295] [2020-07-19 23:42:21,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-19 23:42:21,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:42:21,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-19 23:42:21,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 23:42:21,563 INFO L87 Difference]: Start difference. First operand 196 states and 215 transitions. Second operand 35 states. [2020-07-19 23:42:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:42:21,915 INFO L93 Difference]: Finished difference Result 351 states and 391 transitions. [2020-07-19 23:42:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-19 23:42:21,915 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 126 [2020-07-19 23:42:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:42:21,917 INFO L225 Difference]: With dead ends: 351 [2020-07-19 23:42:21,918 INFO L226 Difference]: Without dead ends: 222 [2020-07-19 23:42:21,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 23:42:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-19 23:42:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 202. [2020-07-19 23:42:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-19 23:42:21,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 222 transitions. [2020-07-19 23:42:21,925 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 222 transitions. Word has length 126 [2020-07-19 23:42:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:42:21,925 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 222 transitions. [2020-07-19 23:42:21,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-19 23:42:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 222 transitions. [2020-07-19 23:42:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-19 23:42:21,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:42:21,926 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:42:22,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:42:22,136 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:42:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:42:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1414090086, now seen corresponding path program 28 times [2020-07-19 23:42:22,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:42:22,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930110527] [2020-07-19 23:42:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:42:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:42:22,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930110527] [2020-07-19 23:42:22,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815346021] [2020-07-19 23:42:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e832e26 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:42:30,826 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e832e26 issued 3 check-sat command(s) [2020-07-19 23:42:30,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:42:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-19 23:42:30,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:42:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:42:30,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:42:30,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2020-07-19 23:42:30,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781276742] [2020-07-19 23:42:30,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-19 23:42:30,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:42:30,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-19 23:42:30,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 23:42:30,910 INFO L87 Difference]: Start difference. First operand 202 states and 222 transitions. Second operand 36 states. [2020-07-19 23:42:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:42:31,292 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2020-07-19 23:42:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-19 23:42:31,293 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 128 [2020-07-19 23:42:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:42:31,295 INFO L225 Difference]: With dead ends: 362 [2020-07-19 23:42:31,295 INFO L226 Difference]: Without dead ends: 229 [2020-07-19 23:42:31,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 23:42:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-19 23:42:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2020-07-19 23:42:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-19 23:42:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 229 transitions. [2020-07-19 23:42:31,301 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 229 transitions. Word has length 128 [2020-07-19 23:42:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:42:31,302 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 229 transitions. [2020-07-19 23:42:31,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-19 23:42:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 229 transitions. [2020-07-19 23:42:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-19 23:42:31,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:42:31,303 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:42:31,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-19 23:42:31,517 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:42:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:42:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash 227147976, now seen corresponding path program 29 times [2020-07-19 23:42:31,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:42:31,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968303869] [2020-07-19 23:42:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:42:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:42:32,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968303869] [2020-07-19 23:42:32,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340690521] [2020-07-19 23:42:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d53bf4d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:42:55,873 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d53bf4d issued 3 check-sat command(s) [2020-07-19 23:42:55,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:42:56,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-19 23:42:56,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:42:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:42:56,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:42:56,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2020-07-19 23:42:56,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702726414] [2020-07-19 23:42:56,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-19 23:42:56,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:42:56,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-19 23:42:56,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 23:42:56,061 INFO L87 Difference]: Start difference. First operand 208 states and 229 transitions. Second operand 37 states. [2020-07-19 23:42:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:42:56,467 INFO L93 Difference]: Finished difference Result 373 states and 417 transitions. [2020-07-19 23:42:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-19 23:42:56,468 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 130 [2020-07-19 23:42:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:42:56,469 INFO L225 Difference]: With dead ends: 373 [2020-07-19 23:42:56,469 INFO L226 Difference]: Without dead ends: 236 [2020-07-19 23:42:56,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 23:42:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-19 23:42:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 214. [2020-07-19 23:42:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-19 23:42:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 236 transitions. [2020-07-19 23:42:56,475 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 236 transitions. Word has length 130 [2020-07-19 23:42:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:42:56,476 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 236 transitions. [2020-07-19 23:42:56,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-19 23:42:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 236 transitions. [2020-07-19 23:42:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-07-19 23:42:56,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:42:56,477 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:42:56,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-19 23:42:56,678 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:42:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:42:56,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2037081002, now seen corresponding path program 30 times [2020-07-19 23:42:56,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:42:56,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610060445] [2020-07-19 23:42:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:42:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:42:57,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610060445] [2020-07-19 23:42:57,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895322779] [2020-07-19 23:42:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e294bfd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:43:34,058 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e294bfd issued 3 check-sat command(s) [2020-07-19 23:43:34,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:43:34,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-19 23:43:34,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:43:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:43:34,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:43:34,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2020-07-19 23:43:34,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153943416] [2020-07-19 23:43:34,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-19 23:43:34,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:34,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-19 23:43:34,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 23:43:34,433 INFO L87 Difference]: Start difference. First operand 214 states and 236 transitions. Second operand 38 states. [2020-07-19 23:43:34,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:34,857 INFO L93 Difference]: Finished difference Result 384 states and 430 transitions. [2020-07-19 23:43:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-19 23:43:34,858 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2020-07-19 23:43:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:34,860 INFO L225 Difference]: With dead ends: 384 [2020-07-19 23:43:34,860 INFO L226 Difference]: Without dead ends: 243 [2020-07-19 23:43:34,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 23:43:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-19 23:43:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 220. [2020-07-19 23:43:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-19 23:43:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 243 transitions. [2020-07-19 23:43:34,868 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 243 transitions. Word has length 132 [2020-07-19 23:43:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:34,868 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 243 transitions. [2020-07-19 23:43:34,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-19 23:43:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 243 transitions. [2020-07-19 23:43:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-19 23:43:34,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:34,869 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:35,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-19 23:43:35,084 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:35,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1920964108, now seen corresponding path program 31 times [2020-07-19 23:43:35,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:35,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677211388] [2020-07-19 23:43:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:43:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:43:35,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677211388] [2020-07-19 23:43:35,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022018286] [2020-07-19 23:43:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25d96aa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:43:54,849 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25d96aa9 issued 3 check-sat command(s) [2020-07-19 23:43:54,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:43:54,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-19 23:43:54,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:43:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:43:54,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:43:54,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2020-07-19 23:43:54,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045670045] [2020-07-19 23:43:54,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-19 23:43:54,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:54,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-19 23:43:54,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 23:43:54,995 INFO L87 Difference]: Start difference. First operand 220 states and 243 transitions. Second operand 39 states. [2020-07-19 23:43:55,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:55,409 INFO L93 Difference]: Finished difference Result 395 states and 443 transitions. [2020-07-19 23:43:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-19 23:43:55,410 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 134 [2020-07-19 23:43:55,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:55,412 INFO L225 Difference]: With dead ends: 395 [2020-07-19 23:43:55,412 INFO L226 Difference]: Without dead ends: 250 [2020-07-19 23:43:55,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 23:43:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-19 23:43:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 226. [2020-07-19 23:43:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-07-19 23:43:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2020-07-19 23:43:55,419 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 134 [2020-07-19 23:43:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:55,419 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2020-07-19 23:43:55,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-19 23:43:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2020-07-19 23:43:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-19 23:43:55,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:55,420 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:55,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-19 23:43:55,621 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:55,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2001778670, now seen corresponding path program 32 times [2020-07-19 23:43:55,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:55,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649265455] [2020-07-19 23:43:55,623 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:43:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:43:56,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649265455] [2020-07-19 23:43:56,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371940421] [2020-07-19 23:43:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c755291 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:44:16,117 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c755291 issued 3 check-sat command(s) [2020-07-19 23:44:16,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:44:16,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-19 23:44:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:44:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:44:16,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:44:16,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2020-07-19 23:44:16,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060793510] [2020-07-19 23:44:16,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-19 23:44:16,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:44:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-19 23:44:16,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 23:44:16,280 INFO L87 Difference]: Start difference. First operand 226 states and 250 transitions. Second operand 40 states. [2020-07-19 23:44:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:44:16,710 INFO L93 Difference]: Finished difference Result 406 states and 456 transitions. [2020-07-19 23:44:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-19 23:44:16,711 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 136 [2020-07-19 23:44:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:44:16,713 INFO L225 Difference]: With dead ends: 406 [2020-07-19 23:44:16,713 INFO L226 Difference]: Without dead ends: 257 [2020-07-19 23:44:16,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 23:44:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-19 23:44:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 232. [2020-07-19 23:44:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-19 23:44:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 257 transitions. [2020-07-19 23:44:16,719 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 257 transitions. Word has length 136 [2020-07-19 23:44:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:44:16,719 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 257 transitions. [2020-07-19 23:44:16,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-19 23:44:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 257 transitions. [2020-07-19 23:44:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-19 23:44:16,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:44:16,720 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:44:16,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-19 23:44:16,933 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:44:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:44:16,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1939805872, now seen corresponding path program 33 times [2020-07-19 23:44:16,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:44:16,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284988775] [2020-07-19 23:44:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:44:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:44:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:44:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:44:17,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284988775] [2020-07-19 23:44:17,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211786599] [2020-07-19 23:44:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45270ac8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:45:08,703 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45270ac8 issued 3 check-sat command(s) [2020-07-19 23:45:08,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:45:09,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-19 23:45:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:45:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:45:09,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:45:09,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2020-07-19 23:45:09,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96033296] [2020-07-19 23:45:09,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-19 23:45:09,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:45:09,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-19 23:45:09,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 23:45:09,343 INFO L87 Difference]: Start difference. First operand 232 states and 257 transitions. Second operand 41 states. [2020-07-19 23:45:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:45:09,958 INFO L93 Difference]: Finished difference Result 417 states and 469 transitions. [2020-07-19 23:45:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-19 23:45:09,958 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 138 [2020-07-19 23:45:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:45:09,961 INFO L225 Difference]: With dead ends: 417 [2020-07-19 23:45:09,961 INFO L226 Difference]: Without dead ends: 264 [2020-07-19 23:45:09,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 23:45:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-19 23:45:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 238. [2020-07-19 23:45:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-19 23:45:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 264 transitions. [2020-07-19 23:45:09,970 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 264 transitions. Word has length 138 [2020-07-19 23:45:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:45:09,970 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 264 transitions. [2020-07-19 23:45:09,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-19 23:45:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 264 transitions. [2020-07-19 23:45:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-19 23:45:09,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:45:09,971 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:45:10,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-19 23:45:10,186 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:45:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:45:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1641395662, now seen corresponding path program 34 times [2020-07-19 23:45:10,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:45:10,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27802435] [2020-07-19 23:45:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:45:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:45:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:45:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:45:11,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27802435] [2020-07-19 23:45:11,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127227718] [2020-07-19 23:45:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@af000c8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:45:50,645 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@af000c8 issued 3 check-sat command(s) [2020-07-19 23:45:50,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:45:50,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-19 23:45:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:45:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:45:50,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:45:50,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2020-07-19 23:45:50,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475725439] [2020-07-19 23:45:50,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-19 23:45:50,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:45:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-19 23:45:50,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 23:45:50,987 INFO L87 Difference]: Start difference. First operand 238 states and 264 transitions. Second operand 42 states. [2020-07-19 23:45:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:45:51,475 INFO L93 Difference]: Finished difference Result 428 states and 482 transitions. [2020-07-19 23:45:51,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-19 23:45:51,476 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 140 [2020-07-19 23:45:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:45:51,478 INFO L225 Difference]: With dead ends: 428 [2020-07-19 23:45:51,478 INFO L226 Difference]: Without dead ends: 271 [2020-07-19 23:45:51,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 23:45:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-19 23:45:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 244. [2020-07-19 23:45:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-19 23:45:51,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 271 transitions. [2020-07-19 23:45:51,485 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 271 transitions. Word has length 140 [2020-07-19 23:45:51,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:45:51,485 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 271 transitions. [2020-07-19 23:45:51,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-19 23:45:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 271 transitions. [2020-07-19 23:45:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-19 23:45:51,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:45:51,486 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:45:51,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-19 23:45:51,695 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:45:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:45:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1662974612, now seen corresponding path program 35 times [2020-07-19 23:45:51,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:45:51,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868319068] [2020-07-19 23:45:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:45:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:45:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:45:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:45:52,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868319068] [2020-07-19 23:45:52,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922173721] [2020-07-19 23:45:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48959b48 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:48:14,576 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48959b48 issued 3 check-sat command(s) [2020-07-19 23:48:14,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:48:18,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 23:48:18,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:48:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:48:18,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:48:18,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2020-07-19 23:48:18,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130886110] [2020-07-19 23:48:18,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-19 23:48:18,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:48:18,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-19 23:48:18,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 23:48:18,202 INFO L87 Difference]: Start difference. First operand 244 states and 271 transitions. Second operand 43 states. [2020-07-19 23:48:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:48:18,637 INFO L93 Difference]: Finished difference Result 439 states and 495 transitions. [2020-07-19 23:48:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-19 23:48:18,637 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 142 [2020-07-19 23:48:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:48:18,640 INFO L225 Difference]: With dead ends: 439 [2020-07-19 23:48:18,640 INFO L226 Difference]: Without dead ends: 278 [2020-07-19 23:48:18,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 23:48:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-19 23:48:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 250. [2020-07-19 23:48:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-07-19 23:48:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2020-07-19 23:48:18,647 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 142 [2020-07-19 23:48:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:48:18,648 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2020-07-19 23:48:18,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-19 23:48:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2020-07-19 23:48:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-07-19 23:48:18,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:48:18,649 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:48:18,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:48:18,863 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:48:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:48:18,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1112991114, now seen corresponding path program 36 times [2020-07-19 23:48:18,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:48:18,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804818739] [2020-07-19 23:48:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:48:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:48:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:48:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:48:19,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804818739] [2020-07-19 23:48:19,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015050843] [2020-07-19 23:48:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@130fb69f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:50:01,502 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@130fb69f issued 3 check-sat command(s) [2020-07-19 23:50:01,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:50:03,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-19 23:50:03,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:50:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:50:03,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:50:03,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2020-07-19 23:50:03,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681972055] [2020-07-19 23:50:03,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-19 23:50:03,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:50:03,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-19 23:50:03,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 23:50:03,092 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand 44 states. [2020-07-19 23:50:03,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:50:03,573 INFO L93 Difference]: Finished difference Result 450 states and 508 transitions. [2020-07-19 23:50:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-19 23:50:03,574 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 144 [2020-07-19 23:50:03,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:50:03,575 INFO L225 Difference]: With dead ends: 450 [2020-07-19 23:50:03,576 INFO L226 Difference]: Without dead ends: 285 [2020-07-19 23:50:03,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 23:50:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-19 23:50:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 256. [2020-07-19 23:50:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-19 23:50:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2020-07-19 23:50:03,583 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 144 [2020-07-19 23:50:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:50:03,583 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2020-07-19 23:50:03,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-19 23:50:03,583 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2020-07-19 23:50:03,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-19 23:50:03,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:50:03,584 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:50:03,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:50:03,798 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:50:03,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:50:03,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1641362984, now seen corresponding path program 37 times [2020-07-19 23:50:03,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:50:03,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097184232] [2020-07-19 23:50:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:50:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:50:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:50:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:50:05,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097184232] [2020-07-19 23:50:05,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491894715] [2020-07-19 23:50:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ba6d8c0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:50:43,548 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ba6d8c0 issued 3 check-sat command(s) [2020-07-19 23:50:43,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:50:44,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-19 23:50:44,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:50:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:50:44,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:50:44,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2020-07-19 23:50:44,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931653672] [2020-07-19 23:50:44,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-19 23:50:44,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:50:44,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-19 23:50:44,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 23:50:44,055 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand 45 states. [2020-07-19 23:50:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:50:44,554 INFO L93 Difference]: Finished difference Result 461 states and 521 transitions. [2020-07-19 23:50:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-19 23:50:44,554 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 146 [2020-07-19 23:50:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:50:44,556 INFO L225 Difference]: With dead ends: 461 [2020-07-19 23:50:44,556 INFO L226 Difference]: Without dead ends: 292 [2020-07-19 23:50:44,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 23:50:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-19 23:50:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 262. [2020-07-19 23:50:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-19 23:50:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 292 transitions. [2020-07-19 23:50:44,567 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 292 transitions. Word has length 146 [2020-07-19 23:50:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:50:44,569 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 292 transitions. [2020-07-19 23:50:44,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-19 23:50:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 292 transitions. [2020-07-19 23:50:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-19 23:50:44,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:50:44,570 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:50:44,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:50:44,784 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:50:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:50:44,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1694378170, now seen corresponding path program 38 times [2020-07-19 23:50:44,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:50:44,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712167758] [2020-07-19 23:50:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:50:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:50:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:50:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:50:45,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712167758] [2020-07-19 23:50:45,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227513932] [2020-07-19 23:50:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e0a5e3e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:51:13,312 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e0a5e3e issued 3 check-sat command(s) [2020-07-19 23:51:13,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:51:13,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-19 23:51:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:51:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:51:13,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:51:13,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2020-07-19 23:51:13,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035377921] [2020-07-19 23:51:13,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-19 23:51:13,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:51:13,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-19 23:51:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 23:51:13,581 INFO L87 Difference]: Start difference. First operand 262 states and 292 transitions. Second operand 46 states. [2020-07-19 23:51:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:51:14,051 INFO L93 Difference]: Finished difference Result 472 states and 534 transitions. [2020-07-19 23:51:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-19 23:51:14,051 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 148 [2020-07-19 23:51:14,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:51:14,053 INFO L225 Difference]: With dead ends: 472 [2020-07-19 23:51:14,053 INFO L226 Difference]: Without dead ends: 299 [2020-07-19 23:51:14,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 23:51:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-07-19 23:51:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 268. [2020-07-19 23:51:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-07-19 23:51:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 299 transitions. [2020-07-19 23:51:14,067 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 299 transitions. Word has length 148 [2020-07-19 23:51:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:51:14,068 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 299 transitions. [2020-07-19 23:51:14,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-19 23:51:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 299 transitions. [2020-07-19 23:51:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-19 23:51:14,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:51:14,069 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:51:14,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-07-19 23:51:14,284 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:51:14,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:51:14,284 INFO L82 PathProgramCache]: Analyzing trace with hash -998942948, now seen corresponding path program 39 times [2020-07-19 23:51:14,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:51:14,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210598452] [2020-07-19 23:51:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:51:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:51:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:51:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:51:15,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210598452] [2020-07-19 23:51:15,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879690661] [2020-07-19 23:51:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5de44f3b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:53:08,152 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5de44f3b issued 3 check-sat command(s) [2020-07-19 23:53:08,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:53:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-19 23:53:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:53:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:53:10,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:53:10,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2020-07-19 23:53:10,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664396378] [2020-07-19 23:53:10,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-19 23:53:10,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:53:10,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-19 23:53:10,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 23:53:10,146 INFO L87 Difference]: Start difference. First operand 268 states and 299 transitions. Second operand 47 states. [2020-07-19 23:53:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:53:10,661 INFO L93 Difference]: Finished difference Result 483 states and 547 transitions. [2020-07-19 23:53:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-19 23:53:10,662 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 150 [2020-07-19 23:53:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:53:10,664 INFO L225 Difference]: With dead ends: 483 [2020-07-19 23:53:10,664 INFO L226 Difference]: Without dead ends: 306 [2020-07-19 23:53:10,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 23:53:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-07-19 23:53:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 274. [2020-07-19 23:53:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-19 23:53:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 306 transitions. [2020-07-19 23:53:10,670 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 306 transitions. Word has length 150 [2020-07-19 23:53:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:53:10,670 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 306 transitions. [2020-07-19 23:53:10,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-19 23:53:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 306 transitions. [2020-07-19 23:53:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-07-19 23:53:10,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:53:10,671 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:53:10,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:53:10,884 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:53:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:53:10,884 INFO L82 PathProgramCache]: Analyzing trace with hash 584742142, now seen corresponding path program 40 times [2020-07-19 23:53:10,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:53:10,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100501117] [2020-07-19 23:53:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2515b652 [2020-07-19 23:53:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:53:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:53:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-19 23:53:12,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100501117] [2020-07-19 23:53:12,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574631741] [2020-07-19 23:53:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a7a9b8a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true