/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:27:52,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:27:52,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:27:52,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:27:52,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:27:52,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:27:52,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:27:52,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:27:52,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:27:52,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:27:52,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:27:52,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:27:52,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:27:52,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:27:52,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:27:52,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:27:52,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:27:52,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:27:52,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:27:52,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:27:52,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:27:52,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:27:52,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:27:52,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:27:52,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:27:52,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:27:52,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:27:52,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:27:52,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:27:52,482 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:27:52,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:27:52,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:27:52,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:27:52,485 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:27:52,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:27:52,485 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:27:52,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:27:52,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:27:52,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:27:52,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:27:52,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:27:52,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:27:52,487 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:27:52,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:27:52,487 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:27:52,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:27:52,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:27:52,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:27:52,488 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:27:52,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:27:52,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:27:52,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:27:52,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:27:52,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:27:52,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:27:52,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:52,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:27:52,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:27:52,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:27:52,851 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:27:52,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:27:52,875 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:27:52,877 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:27:52,878 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:27:52,879 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c [2020-07-20 22:27:52,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22c8aca71/b0438104c77b4f908eafa2725c2294e8/FLAGde30ac60b [2020-07-20 22:27:53,538 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:27:53,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c [2020-07-20 22:27:53,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22c8aca71/b0438104c77b4f908eafa2725c2294e8/FLAGde30ac60b [2020-07-20 22:27:53,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22c8aca71/b0438104c77b4f908eafa2725c2294e8 [2020-07-20 22:27:53,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:27:53,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:27:53,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:27:53,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:27:53,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:27:53,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:27:53" (1/1) ... [2020-07-20 22:27:53,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18c3758e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:53, skipping insertion in model container [2020-07-20 22:27:53,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:27:53" (1/1) ... [2020-07-20 22:27:53,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:27:53,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:27:54,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:27:54,174 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:27:54,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:27:54,338 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:27:54,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:54 WrapperNode [2020-07-20 22:27:54,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:27:54,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:27:54,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:27:54,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:27:54,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:54" (1/1) ... [2020-07-20 22:27:54,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:54" (1/1) ... [2020-07-20 22:27:54,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:54" (1/1) ... [2020-07-20 22:27:54,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:54" (1/1) ... [2020-07-20 22:27:54,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:54" (1/1) ... [2020-07-20 22:27:54,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:54" (1/1) ... [2020-07-20 22:27:54,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:54" (1/1) ... [2020-07-20 22:27:54,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:27:54,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:27:54,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:27:54,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:27:54,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:27:54,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:27:54,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:27:54,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:27:54,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:27:54,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:27:54,465 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:27:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:27:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:27:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:27:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:27:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:27:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:27:54,851 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:27:54,852 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 22:27:54,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:27:54 BoogieIcfgContainer [2020-07-20 22:27:54,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:27:54,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:27:54,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:27:54,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:27:54,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:27:53" (1/3) ... [2020-07-20 22:27:54,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1861fcbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:27:54, skipping insertion in model container [2020-07-20 22:27:54,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:27:54" (2/3) ... [2020-07-20 22:27:54,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1861fcbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:27:54, skipping insertion in model container [2020-07-20 22:27:54,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:27:54" (3/3) ... [2020-07-20 22:27:54,867 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i.v+cfa-reducer.c [2020-07-20 22:27:54,877 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:27:54,884 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-07-20 22:27:54,907 INFO L251 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-07-20 22:27:54,941 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:27:54,942 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:27:54,942 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:27:54,942 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:27:54,942 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:27:54,942 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:27:54,942 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:27:54,943 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:27:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-07-20 22:27:54,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 22:27:54,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:54,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:54,978 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:54,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1781845407, now seen corresponding path program 1 times [2020-07-20 22:27:54,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:54,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367620979] [2020-07-20 22:27:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:55,096 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:27:55,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:55,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:27:55,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:55,157 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:55,165 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:55,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:55,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367620979] [2020-07-20 22:27:55,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:55,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:27:55,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805637233] [2020-07-20 22:27:55,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:27:55,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:55,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:27:55,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:27:55,209 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-07-20 22:27:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:55,259 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2020-07-20 22:27:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:27:55,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 22:27:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:55,274 INFO L225 Difference]: With dead ends: 88 [2020-07-20 22:27:55,274 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 22:27:55,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:27:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 22:27:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-07-20 22:27:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 22:27:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-07-20 22:27:55,330 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 13 [2020-07-20 22:27:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:55,331 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-07-20 22:27:55,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:27:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-07-20 22:27:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 22:27:55,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:55,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:55,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:55,549 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:55,550 INFO L82 PathProgramCache]: Analyzing trace with hash -594195383, now seen corresponding path program 1 times [2020-07-20 22:27:55,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:55,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028911420] [2020-07-20 22:27:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:55,602 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:55,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:27:55,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:55,624 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:55,633 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:55,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:55,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028911420] [2020-07-20 22:27:55,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:55,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:27:55,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010540113] [2020-07-20 22:27:55,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:27:55,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:27:55,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:27:55,658 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 4 states. [2020-07-20 22:27:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:55,766 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2020-07-20 22:27:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:27:55,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 22:27:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:55,768 INFO L225 Difference]: With dead ends: 153 [2020-07-20 22:27:55,768 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 22:27:55,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 22:27:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 58. [2020-07-20 22:27:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 22:27:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-07-20 22:27:55,781 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 14 [2020-07-20 22:27:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:55,781 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-07-20 22:27:55,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:27:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-07-20 22:27:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 22:27:55,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:55,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:55,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:55,997 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:55,999 INFO L82 PathProgramCache]: Analyzing trace with hash -597364152, now seen corresponding path program 1 times [2020-07-20 22:27:55,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:56,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241733163] [2020-07-20 22:27:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:56,038 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:56,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:27:56,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:56,063 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:56,068 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:56,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:56,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241733163] [2020-07-20 22:27:56,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:56,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:27:56,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459053357] [2020-07-20 22:27:56,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:27:56,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:56,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:27:56,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:27:56,091 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 4 states. [2020-07-20 22:27:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:56,187 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-07-20 22:27:56,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:27:56,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 22:27:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:56,189 INFO L225 Difference]: With dead ends: 75 [2020-07-20 22:27:56,189 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 22:27:56,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 22:27:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2020-07-20 22:27:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 22:27:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-07-20 22:27:56,206 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 14 [2020-07-20 22:27:56,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:56,207 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-07-20 22:27:56,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:27:56,207 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-07-20 22:27:56,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 22:27:56,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:56,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:56,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:56,426 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:56,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:56,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1240184593, now seen corresponding path program 1 times [2020-07-20 22:27:56,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:56,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455460916] [2020-07-20 22:27:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:56,496 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:56,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:56,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:27:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:56,514 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:56,516 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:56,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:56,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455460916] [2020-07-20 22:27:56,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:56,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:27:56,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905158184] [2020-07-20 22:27:56,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:27:56,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:56,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:27:56,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:27:56,527 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 4 states. [2020-07-20 22:27:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:56,648 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-07-20 22:27:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:27:56,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-07-20 22:27:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:56,650 INFO L225 Difference]: With dead ends: 96 [2020-07-20 22:27:56,651 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 22:27:56,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 22:27:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2020-07-20 22:27:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 22:27:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-07-20 22:27:56,670 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 15 [2020-07-20 22:27:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:56,671 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-07-20 22:27:56,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:27:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-07-20 22:27:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 22:27:56,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:56,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:56,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:56,876 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash 208986383, now seen corresponding path program 1 times [2020-07-20 22:27:56,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:56,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353592470] [2020-07-20 22:27:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:56,913 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:56,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:56,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:27:56,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:56,950 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:56,952 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:56,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:56,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353592470] [2020-07-20 22:27:56,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:56,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:27:56,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896144676] [2020-07-20 22:27:56,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:27:56,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:27:56,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:56,965 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 5 states. [2020-07-20 22:27:57,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:57,097 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-07-20 22:27:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:27:57,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 22:27:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:57,103 INFO L225 Difference]: With dead ends: 95 [2020-07-20 22:27:57,104 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 22:27:57,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:27:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 22:27:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 52. [2020-07-20 22:27:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 22:27:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-07-20 22:27:57,125 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2020-07-20 22:27:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:57,125 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-07-20 22:27:57,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:27:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-07-20 22:27:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 22:27:57,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:57,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:57,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:57,331 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1458792136, now seen corresponding path program 1 times [2020-07-20 22:27:57,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:57,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310411296] [2020-07-20 22:27:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:57,388 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:57,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:27:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:57,402 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:57,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:57,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310411296] [2020-07-20 22:27:57,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:57,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:27:57,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488269099] [2020-07-20 22:27:57,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:27:57,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:57,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:27:57,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:27:57,419 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2020-07-20 22:27:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:57,502 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-07-20 22:27:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:27:57,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-20 22:27:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:57,503 INFO L225 Difference]: With dead ends: 69 [2020-07-20 22:27:57,503 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 22:27:57,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 22:27:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 22:27:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 22:27:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-07-20 22:27:57,510 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 16 [2020-07-20 22:27:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:57,511 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-07-20 22:27:57,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:27:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-07-20 22:27:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 22:27:57,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:57,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:57,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:57,724 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:57,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:57,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2111353611, now seen corresponding path program 1 times [2020-07-20 22:27:57,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:57,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856224818] [2020-07-20 22:27:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:57,762 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:57,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:27:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:57,780 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:57,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:57,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856224818] [2020-07-20 22:27:57,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:57,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:27:57,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010057592] [2020-07-20 22:27:57,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:27:57,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:57,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:27:57,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:27:57,790 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 4 states. [2020-07-20 22:27:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:57,878 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2020-07-20 22:27:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:27:57,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-20 22:27:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:57,880 INFO L225 Difference]: With dead ends: 91 [2020-07-20 22:27:57,880 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 22:27:57,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 22:27:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 48. [2020-07-20 22:27:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 22:27:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-07-20 22:27:57,892 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 17 [2020-07-20 22:27:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:57,892 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-07-20 22:27:57,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:27:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-07-20 22:27:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 22:27:57,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:57,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:58,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:58,108 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:58,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:58,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2022080917, now seen corresponding path program 1 times [2020-07-20 22:27:58,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:58,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646548018] [2020-07-20 22:27:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:58,143 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:58,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:58,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 22:27:58,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:58,171 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:58,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:58,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646548018] [2020-07-20 22:27:58,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:58,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:27:58,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818512355] [2020-07-20 22:27:58,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:27:58,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:58,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:27:58,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:27:58,184 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 4 states. [2020-07-20 22:27:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:58,265 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-20 22:27:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:27:58,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-20 22:27:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:58,267 INFO L225 Difference]: With dead ends: 62 [2020-07-20 22:27:58,267 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 22:27:58,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 22:27:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-07-20 22:27:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 22:27:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-20 22:27:58,275 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 17 [2020-07-20 22:27:58,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:58,276 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-20 22:27:58,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:27:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-20 22:27:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 22:27:58,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:58,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:58,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:58,491 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:58,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1740004142, now seen corresponding path program 1 times [2020-07-20 22:27:58,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:58,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729829035] [2020-07-20 22:27:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:58,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:58,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:27:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:58,560 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:58,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:58,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729829035] [2020-07-20 22:27:58,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:58,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:27:58,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120731140] [2020-07-20 22:27:58,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:27:58,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:58,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:27:58,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:58,585 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-07-20 22:27:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:58,665 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-20 22:27:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:27:58,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-20 22:27:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:58,667 INFO L225 Difference]: With dead ends: 61 [2020-07-20 22:27:58,667 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 22:27:58,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:27:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 22:27:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2020-07-20 22:27:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 22:27:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-20 22:27:58,673 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 18 [2020-07-20 22:27:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:58,673 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-20 22:27:58,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:27:58,674 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-20 22:27:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 22:27:58,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:58,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:58,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:58,886 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:58,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1894443311, now seen corresponding path program 1 times [2020-07-20 22:27:58,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:58,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734738711] [2020-07-20 22:27:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:58,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:27:58,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:58,940 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:58,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:58,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734738711] [2020-07-20 22:27:58,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:58,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:27:58,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645459150] [2020-07-20 22:27:58,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:27:58,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:27:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:27:58,951 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 4 states. [2020-07-20 22:27:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:59,024 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-20 22:27:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:27:59,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-07-20 22:27:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:59,025 INFO L225 Difference]: With dead ends: 61 [2020-07-20 22:27:59,025 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 22:27:59,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 22:27:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-07-20 22:27:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 22:27:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-07-20 22:27:59,031 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 19 [2020-07-20 22:27:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:59,032 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-07-20 22:27:59,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:27:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-07-20 22:27:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 22:27:59,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:59,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:59,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:59,244 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:59,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:59,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1401802644, now seen corresponding path program 1 times [2020-07-20 22:27:59,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:59,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475117544] [2020-07-20 22:27:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:59,282 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:59,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:59,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:27:59,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:59,301 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:59,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:59,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475117544] [2020-07-20 22:27:59,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:59,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:27:59,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001035650] [2020-07-20 22:27:59,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:27:59,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:27:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:27:59,321 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 4 states. [2020-07-20 22:27:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:59,413 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-07-20 22:27:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:27:59,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 22:27:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:59,414 INFO L225 Difference]: With dead ends: 69 [2020-07-20 22:27:59,414 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 22:27:59,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 22:27:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2020-07-20 22:27:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 22:27:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-07-20 22:27:59,432 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 20 [2020-07-20 22:27:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:59,435 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-07-20 22:27:59,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:27:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-07-20 22:27:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 22:27:59,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:59,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:27:59,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:59,640 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:27:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:27:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash 506212151, now seen corresponding path program 1 times [2020-07-20 22:27:59,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:27:59,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241496296] [2020-07-20 22:27:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:27:59,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:27:59,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:27:59,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:27:59,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:27:59,702 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:59,704 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:27:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:27:59,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:27:59,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241496296] [2020-07-20 22:27:59,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:27:59,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:27:59,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466640742] [2020-07-20 22:27:59,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:27:59,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:27:59,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:27:59,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:27:59,719 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-07-20 22:27:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:27:59,825 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-07-20 22:27:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:27:59,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 22:27:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:27:59,827 INFO L225 Difference]: With dead ends: 74 [2020-07-20 22:27:59,827 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 22:27:59,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:27:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 22:27:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2020-07-20 22:27:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 22:27:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-07-20 22:27:59,834 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 21 [2020-07-20 22:27:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:27:59,835 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-07-20 22:27:59,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:27:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-07-20 22:27:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 22:27:59,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:27:59,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:28:00,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:00,041 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:28:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:28:00,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1487289350, now seen corresponding path program 1 times [2020-07-20 22:28:00,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:28:00,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032503482] [2020-07-20 22:28:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:00,088 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:28:00,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:28:00,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:28:00,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:28:00,142 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:28:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:28:00,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:28:00,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032503482] [2020-07-20 22:28:00,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:28:00,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:28:00,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835967853] [2020-07-20 22:28:00,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:28:00,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:28:00,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:28:00,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:28:00,163 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2020-07-20 22:28:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:28:00,319 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-07-20 22:28:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 22:28:00,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-20 22:28:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:28:00,320 INFO L225 Difference]: With dead ends: 62 [2020-07-20 22:28:00,321 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 22:28:00,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:28:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 22:28:00,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2020-07-20 22:28:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 22:28:00,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-07-20 22:28:00,327 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2020-07-20 22:28:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:28:00,327 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-07-20 22:28:00,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:28:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-20 22:28:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 22:28:00,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:28:00,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:28:00,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:00,542 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:28:00,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:28:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1138673565, now seen corresponding path program 1 times [2020-07-20 22:28:00,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:28:00,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790148308] [2020-07-20 22:28:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:00,579 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:28:00,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:28:00,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:28:00,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:28:00,599 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:28:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:28:00,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:28:00,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790148308] [2020-07-20 22:28:00,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:28:00,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:28:00,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145927965] [2020-07-20 22:28:00,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:28:00,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:28:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:28:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:28:00,610 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 5 states. [2020-07-20 22:28:00,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:28:00,713 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2020-07-20 22:28:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:28:00,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-07-20 22:28:00,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:28:00,714 INFO L225 Difference]: With dead ends: 87 [2020-07-20 22:28:00,714 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 22:28:00,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:28:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 22:28:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 34. [2020-07-20 22:28:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 22:28:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-20 22:28:00,721 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2020-07-20 22:28:00,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:28:00,722 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-20 22:28:00,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:28:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-20 22:28:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 22:28:00,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:28:00,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:28:00,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:00,925 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:28:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:28:00,926 INFO L82 PathProgramCache]: Analyzing trace with hash 939145312, now seen corresponding path program 1 times [2020-07-20 22:28:00,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:28:00,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944531816] [2020-07-20 22:28:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:00,977 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:28:00,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:28:00,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:28:00,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:28:01,004 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:28:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:28:01,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:28:01,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944531816] [2020-07-20 22:28:01,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:28:01,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:28:01,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824523558] [2020-07-20 22:28:01,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:28:01,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:28:01,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:28:01,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:28:01,015 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-07-20 22:28:01,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:28:01,140 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-07-20 22:28:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 22:28:01,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-07-20 22:28:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:28:01,141 INFO L225 Difference]: With dead ends: 60 [2020-07-20 22:28:01,141 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 22:28:01,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:28:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 22:28:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 32. [2020-07-20 22:28:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 22:28:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 22:28:01,148 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2020-07-20 22:28:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:28:01,148 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 22:28:01,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:28:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 22:28:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 22:28:01,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:28:01,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:28:01,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:01,363 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:28:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:28:01,364 INFO L82 PathProgramCache]: Analyzing trace with hash -951263229, now seen corresponding path program 1 times [2020-07-20 22:28:01,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:28:01,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203882369] [2020-07-20 22:28:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:01,407 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:28:01,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:28:01,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:28:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:28:01,436 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:28:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:28:01,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:28:01,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203882369] [2020-07-20 22:28:01,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:28:01,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:28:01,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431454645] [2020-07-20 22:28:01,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:28:01,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:28:01,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:28:01,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:28:01,448 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-07-20 22:28:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:28:01,606 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2020-07-20 22:28:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 22:28:01,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-20 22:28:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:28:01,607 INFO L225 Difference]: With dead ends: 125 [2020-07-20 22:28:01,607 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:28:01,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:28:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:28:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:28:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:28:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:28:01,609 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-20 22:28:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:28:01,609 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:28:01,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:28:01,609 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:28:01,610 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:28:01,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:28:01,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:28:02,185 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 64 [2020-07-20 22:28:02,382 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 50 [2020-07-20 22:28:02,550 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2020-07-20 22:28:02,670 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 17 [2020-07-20 22:28:02,758 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:28:02,758 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:28:02,758 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:28:02,758 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:28:02,758 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:28:02,759 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:28:02,759 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:28:02,759 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 22:28:02,759 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 22:28:02,759 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 22:28:02,759 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 22:28:02,759 INFO L268 CegarLoopResult]: For program point L225(lines 225 267) no Hoare annotation was computed. [2020-07-20 22:28:02,760 INFO L268 CegarLoopResult]: For program point mainErr3ASSERT_VIOLATIONERROR_FUNCTION(line 86) no Hoare annotation was computed. [2020-07-20 22:28:02,760 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 311) no Hoare annotation was computed. [2020-07-20 22:28:02,760 INFO L268 CegarLoopResult]: For program point L151(line 151) no Hoare annotation was computed. [2020-07-20 22:28:02,760 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-07-20 22:28:02,760 INFO L268 CegarLoopResult]: For program point mainErr11ASSERT_VIOLATIONERROR_FUNCTION(line 203) no Hoare annotation was computed. [2020-07-20 22:28:02,760 INFO L268 CegarLoopResult]: For program point L201(lines 201 271) no Hoare annotation was computed. [2020-07-20 22:28:02,760 INFO L268 CegarLoopResult]: For program point L36(lines 36 292) no Hoare annotation was computed. [2020-07-20 22:28:02,760 INFO L268 CegarLoopResult]: For program point mainErr6ASSERT_VIOLATIONERROR_FUNCTION(line 139) no Hoare annotation was computed. [2020-07-20 22:28:02,761 INFO L268 CegarLoopResult]: For program point L86(line 86) no Hoare annotation was computed. [2020-07-20 22:28:02,761 INFO L268 CegarLoopResult]: For program point L243(line 243) no Hoare annotation was computed. [2020-07-20 22:28:02,761 INFO L268 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-07-20 22:28:02,761 INFO L268 CegarLoopResult]: For program point mainErr14ASSERT_VIOLATIONERROR_FUNCTION(line 243) no Hoare annotation was computed. [2020-07-20 22:28:02,761 INFO L268 CegarLoopResult]: For program point L227(line 227) no Hoare annotation was computed. [2020-07-20 22:28:02,761 INFO L268 CegarLoopResult]: For program point L161(lines 161 277) no Hoare annotation was computed. [2020-07-20 22:28:02,761 INFO L268 CegarLoopResult]: For program point mainErr5ASSERT_VIOLATIONERROR_FUNCTION(line 110) no Hoare annotation was computed. [2020-07-20 22:28:02,761 INFO L264 CegarLoopResult]: At program point L302(lines 23 310) the Hoare annotation is: (and (<= (+ main_~main__limit~0 4) main_~main__bufsize~0) (<= 0 main_~main__i~0)) [2020-07-20 22:28:02,762 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 311) no Hoare annotation was computed. [2020-07-20 22:28:02,762 INFO L268 CegarLoopResult]: For program point L203(line 203) no Hoare annotation was computed. [2020-07-20 22:28:02,762 INFO L268 CegarLoopResult]: For program point mainErr13ASSERT_VIOLATIONERROR_FUNCTION(line 227) no Hoare annotation was computed. [2020-07-20 22:28:02,762 INFO L268 CegarLoopResult]: For program point L137(lines 137 281) no Hoare annotation was computed. [2020-07-20 22:28:02,762 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2020-07-20 22:28:02,763 INFO L268 CegarLoopResult]: For program point L96(lines 96 123) no Hoare annotation was computed. [2020-07-20 22:28:02,763 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 311) the Hoare annotation is: true [2020-07-20 22:28:02,763 INFO L268 CegarLoopResult]: For program point L253(lines 253 263) no Hoare annotation was computed. [2020-07-20 22:28:02,763 INFO L268 CegarLoopResult]: For program point L55(lines 55 284) no Hoare annotation was computed. [2020-07-20 22:28:02,763 INFO L268 CegarLoopResult]: For program point mainErr8ASSERT_VIOLATIONERROR_FUNCTION(line 163) no Hoare annotation was computed. [2020-07-20 22:28:02,763 INFO L268 CegarLoopResult]: For program point L72(lines 72 127) no Hoare annotation was computed. [2020-07-20 22:28:02,764 INFO L264 CegarLoopResult]: At program point L262(lines 29 304) the Hoare annotation is: (let ((.cse1 (<= (+ main_~main__j~0 4) main_~main__bufsize~0)) (.cse3 (<= (+ main_~main__limit~0 4) main_~main__bufsize~0))) (let ((.cse0 (let ((.cse4 (<= 1 main_~main__i~0))) (or (and .cse3 .cse1 .cse4) (and .cse3 .cse4 (<= 1 main_~__VERIFIER_assert__cond~12))))) (.cse2 (<= 1 main_~main__j~0))) (or (and .cse0 .cse1 .cse2) (and .cse0 (<= 1 main_~__VERIFIER_assert__cond~14) .cse2) (and (< main_~main__i~0 main_~main__len~0) (<= 0 main_~main__j~0) .cse3 (<= 0 main_~main__i~0))))) [2020-07-20 22:28:02,764 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-07-20 22:28:02,764 INFO L268 CegarLoopResult]: For program point L64(lines 64 283) no Hoare annotation was computed. [2020-07-20 22:28:02,764 INFO L268 CegarLoopResult]: For program point mainErr7ASSERT_VIOLATIONERROR_FUNCTION(line 151) no Hoare annotation was computed. [2020-07-20 22:28:02,764 INFO L268 CegarLoopResult]: For program point L213(lines 213 269) no Hoare annotation was computed. [2020-07-20 22:28:02,766 INFO L268 CegarLoopResult]: For program point mainErr15ASSERT_VIOLATIONERROR_FUNCTION(line 255) no Hoare annotation was computed. [2020-07-20 22:28:02,766 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-07-20 22:28:02,766 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-07-20 22:28:02,766 INFO L268 CegarLoopResult]: For program point mainErr2ASSERT_VIOLATIONERROR_FUNCTION(line 74) no Hoare annotation was computed. [2020-07-20 22:28:02,767 INFO L268 CegarLoopResult]: For program point L255(line 255) no Hoare annotation was computed. [2020-07-20 22:28:02,767 INFO L268 CegarLoopResult]: For program point L189(lines 189 273) no Hoare annotation was computed. [2020-07-20 22:28:02,767 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-07-20 22:28:02,767 INFO L268 CegarLoopResult]: For program point L173(lines 173 275) no Hoare annotation was computed. [2020-07-20 22:28:02,767 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-07-20 22:28:02,767 INFO L268 CegarLoopResult]: For program point mainErr10ASSERT_VIOLATIONERROR_FUNCTION(line 191) no Hoare annotation was computed. [2020-07-20 22:28:02,768 INFO L268 CegarLoopResult]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 57) no Hoare annotation was computed. [2020-07-20 22:28:02,768 INFO L268 CegarLoopResult]: For program point L215(line 215) no Hoare annotation was computed. [2020-07-20 22:28:02,768 INFO L268 CegarLoopResult]: For program point L149(lines 149 279) no Hoare annotation was computed. [2020-07-20 22:28:02,768 INFO L268 CegarLoopResult]: For program point mainErr9ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-07-20 22:28:02,768 INFO L268 CegarLoopResult]: For program point L108(lines 108 121) no Hoare annotation was computed. [2020-07-20 22:28:02,768 INFO L268 CegarLoopResult]: For program point L34(lines 34 298) no Hoare annotation was computed. [2020-07-20 22:28:02,768 INFO L268 CegarLoopResult]: For program point L191(line 191) no Hoare annotation was computed. [2020-07-20 22:28:02,768 INFO L268 CegarLoopResult]: For program point mainErr4ASSERT_VIOLATIONERROR_FUNCTION(line 98) no Hoare annotation was computed. [2020-07-20 22:28:02,769 INFO L268 CegarLoopResult]: For program point L84(lines 84 125) no Hoare annotation was computed. [2020-07-20 22:28:02,769 INFO L268 CegarLoopResult]: For program point L18(lines 18 310) no Hoare annotation was computed. [2020-07-20 22:28:02,769 INFO L268 CegarLoopResult]: For program point mainErr12ASSERT_VIOLATIONERROR_FUNCTION(line 215) no Hoare annotation was computed. [2020-07-20 22:28:02,769 INFO L268 CegarLoopResult]: For program point L241(lines 241 265) no Hoare annotation was computed. [2020-07-20 22:28:02,769 INFO L268 CegarLoopResult]: For program point L175(line 175) no Hoare annotation was computed. [2020-07-20 22:28:02,769 INFO L268 CegarLoopResult]: For program point L43(lines 43 286) no Hoare annotation was computed. [2020-07-20 22:28:02,769 INFO L264 CegarLoopResult]: At program point L291(lines 36 292) the Hoare annotation is: (and (< main_~main__i~0 main_~main__len~0) (<= 0 main_~main__j~0) (<= (+ main_~main__limit~0 4) main_~main__bufsize~0) (<= 0 main_~main__i~0) (<= (+ main_~main__j~0 5) main_~main__bufsize~0)) [2020-07-20 22:28:02,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:28:02 BoogieIcfgContainer [2020-07-20 22:28:02,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:28:02,811 INFO L168 Benchmark]: Toolchain (without parser) took 8984.43 ms. Allocated memory was 137.4 MB in the beginning and 278.4 MB in the end (delta: 141.0 MB). Free memory was 101.9 MB in the beginning and 168.3 MB in the end (delta: -66.5 MB). Peak memory consumption was 121.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:28:02,812 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 22:28:02,812 INFO L168 Benchmark]: CACSL2BoogieTranslator took 512.55 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 101.5 MB in the beginning and 180.7 MB in the end (delta: -79.3 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-07-20 22:28:02,813 INFO L168 Benchmark]: Boogie Preprocessor took 45.96 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 178.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-07-20 22:28:02,813 INFO L168 Benchmark]: RCFGBuilder took 470.37 ms. Allocated memory is still 201.9 MB. Free memory was 178.8 MB in the beginning and 156.2 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:28:02,814 INFO L168 Benchmark]: TraceAbstraction took 7947.23 ms. Allocated memory was 201.9 MB in the beginning and 278.4 MB in the end (delta: 76.5 MB). Free memory was 155.5 MB in the beginning and 168.3 MB in the end (delta: -12.8 MB). Peak memory consumption was 110.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:28:02,821 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 512.55 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 101.5 MB in the beginning and 180.7 MB in the end (delta: -79.3 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.96 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 178.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 470.37 ms. Allocated memory is still 201.9 MB. Free memory was 178.8 MB in the beginning and 156.2 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7947.23 ms. Allocated memory was 201.9 MB in the beginning and 278.4 MB in the end (delta: 76.5 MB). Free memory was 155.5 MB in the beginning and 168.3 MB in the end (delta: -12.8 MB). Peak memory consumption was 110.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 45]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 255]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 151]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 163]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 227]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 191]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 243]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 215]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 98]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 203]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 74]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 139]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 110]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 86]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 57]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 16 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: ((((((main__limit + 4 <= main__bufsize && main__j + 4 <= main__bufsize) && 1 <= main__i) || ((main__limit + 4 <= main__bufsize && 1 <= main__i) && 1 <= __VERIFIER_assert__cond)) && main__j + 4 <= main__bufsize) && 1 <= main__j) || (((((main__limit + 4 <= main__bufsize && main__j + 4 <= main__bufsize) && 1 <= main__i) || ((main__limit + 4 <= main__bufsize && 1 <= main__i) && 1 <= __VERIFIER_assert__cond)) && 1 <= __VERIFIER_assert__cond) && 1 <= main__j)) || (((main__i < main__len && 0 <= main__j) && main__limit + 4 <= main__bufsize) && 0 <= main__i) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((main__i < main__len && 0 <= main__j) && main__limit + 4 <= main__bufsize) && 0 <= main__i) && main__j + 5 <= main__bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: main__limit + 4 <= main__bufsize && 0 <= main__i - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 69 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.8s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 934 SDtfs, 1202 SDslu, 822 SDs, 0 SdLazy, 784 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 308 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 424 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 26 NumberOfFragments, 119 HoareAnnotationTreeSize, 7 FomulaSimplifications, 52103879 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 7 FomulaSimplificationsInter, 12354 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 294 NumberOfCodeBlocks, 242 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 278 ConstructedInterpolants, 0 QuantifiedInterpolants, 12794 SizeOfPredicates, 62 NumberOfNonLiveVariables, 1116 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...