/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 NUM_FUNCTIONS --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/eca-rers2012/Problem10_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:10:15,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:10:15,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:10:15,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:10:15,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:10:15,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:10:15,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:10:15,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:10:15,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:10:15,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:10:15,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:10:15,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:10:15,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:10:15,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:10:15,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:10:15,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:10:15,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:10:15,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:10:15,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:10:15,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:10:15,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:10:15,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:10:15,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:10:15,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:10:15,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:10:15,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:10:15,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:10:15,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:10:15,517 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 14:10:15,531 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:10:15,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:10:15,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:10:15,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:10:15,533 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:10:15,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:10:15,534 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:10:15,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:10:15,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:10:15,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:10:15,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:10:15,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:10:15,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:10:15,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:10:15,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:10:15,535 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:10:15,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:10:15,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:10:15,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:10:15,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:10:15,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:10:15,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:10:15,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:10:15,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:10:15,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:10:15,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:10:15,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:10:15,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:10:15,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:10:15,538 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 -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 14:10:15,910 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:10:15,923 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:10:15,927 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:10:15,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:10:15,928 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:10:15,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label45.c [2020-07-20 14:10:16,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db13213a4/467c8ae3efe149aab51688bd8d02248a/FLAG54afd9af5 [2020-07-20 14:10:16,517 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:10:16,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label45.c [2020-07-20 14:10:16,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db13213a4/467c8ae3efe149aab51688bd8d02248a/FLAG54afd9af5 [2020-07-20 14:10:16,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db13213a4/467c8ae3efe149aab51688bd8d02248a [2020-07-20 14:10:16,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:10:16,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:10:16,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:10:16,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:10:16,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:10:16,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:10:16" (1/1) ... [2020-07-20 14:10:16,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71bc094c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:16, skipping insertion in model container [2020-07-20 14:10:16,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:10:16" (1/1) ... [2020-07-20 14:10:16,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:10:16,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:10:17,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:10:17,353 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:10:17,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:10:17,575 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:10:17,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:17 WrapperNode [2020-07-20 14:10:17,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:10:17,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:10:17,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:10:17,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:10:17,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:17" (1/1) ... [2020-07-20 14:10:17,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:17" (1/1) ... [2020-07-20 14:10:17,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:17" (1/1) ... [2020-07-20 14:10:17,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:17" (1/1) ... [2020-07-20 14:10:17,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:17" (1/1) ... [2020-07-20 14:10:17,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:17" (1/1) ... [2020-07-20 14:10:17,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:17" (1/1) ... [2020-07-20 14:10:17,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:10:17,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:10:17,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:10:17,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:10:17,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:17" (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 14:10:17,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:10:17,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:10:17,773 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-20 14:10:17,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:10:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-20 14:10:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:10:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:10:17,774 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 14:10:17,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:10:17,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:10:17,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:10:18,985 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:10:18,985 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:10:18,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:10:18 BoogieIcfgContainer [2020-07-20 14:10:18,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:10:18,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:10:18,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:10:18,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:10:18,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:10:16" (1/3) ... [2020-07-20 14:10:18,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c0c558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:10:18, skipping insertion in model container [2020-07-20 14:10:18,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:10:17" (2/3) ... [2020-07-20 14:10:18,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c0c558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:10:18, skipping insertion in model container [2020-07-20 14:10:18,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:10:18" (3/3) ... [2020-07-20 14:10:19,001 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label45.c [2020-07-20 14:10:19,011 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:10:19,019 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:10:19,034 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:10:19,060 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:10:19,060 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:10:19,061 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:10:19,061 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:10:19,061 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:10:19,061 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:10:19,062 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:10:19,062 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:10:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-20 14:10:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 14:10:19,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:10:19,095 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:10:19,095 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:10:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:10:19,102 INFO L82 PathProgramCache]: Analyzing trace with hash 312365279, now seen corresponding path program 1 times [2020-07-20 14:10:19,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:10:19,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124820443] [2020-07-20 14:10:19,111 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 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 14:10:19,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:10:19,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:10:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:10:19,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:10:19,295 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 14:10:19,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:10:19,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124820443] [2020-07-20 14:10:19,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:10:19,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:10:19,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256174222] [2020-07-20 14:10:19,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:10:19,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:10:19,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:10:19,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:10:19,321 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-07-20 14:10:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:10:20,322 INFO L93 Difference]: Finished difference Result 586 states and 1004 transitions. [2020-07-20 14:10:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:10:20,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-07-20 14:10:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:10:20,340 INFO L225 Difference]: With dead ends: 586 [2020-07-20 14:10:20,341 INFO L226 Difference]: Without dead ends: 294 [2020-07-20 14:10:20,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 14:10:20,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-20 14:10:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-07-20 14:10:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-20 14:10:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 426 transitions. [2020-07-20 14:10:20,425 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 426 transitions. Word has length 44 [2020-07-20 14:10:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:10:20,426 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 426 transitions. [2020-07-20 14:10:20,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:10:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 426 transitions. [2020-07-20 14:10:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-20 14:10:20,432 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:10:20,432 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:10:20,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:10:20,646 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:10:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:10:20,647 INFO L82 PathProgramCache]: Analyzing trace with hash -269514694, now seen corresponding path program 1 times [2020-07-20 14:10:20,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:10:20,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955241148] [2020-07-20 14:10:20,648 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 14:10:20,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:10:20,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:10:20,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:10:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:10:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:10:20,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:10:20,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955241148] [2020-07-20 14:10:20,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:10:20,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:10:20,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406239244] [2020-07-20 14:10:20,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:10:20,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:10:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:10:20,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:10:20,795 INFO L87 Difference]: Start difference. First operand 294 states and 426 transitions. Second operand 5 states. [2020-07-20 14:10:21,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:10:21,805 INFO L93 Difference]: Finished difference Result 890 states and 1316 transitions. [2020-07-20 14:10:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 14:10:21,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-07-20 14:10:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:10:21,818 INFO L225 Difference]: With dead ends: 890 [2020-07-20 14:10:21,819 INFO L226 Difference]: Without dead ends: 602 [2020-07-20 14:10:21,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 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 14:10:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-07-20 14:10:21,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2020-07-20 14:10:21,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-20 14:10:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 775 transitions. [2020-07-20 14:10:21,907 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 775 transitions. Word has length 118 [2020-07-20 14:10:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:10:21,909 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 775 transitions. [2020-07-20 14:10:21,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:10:21,910 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 775 transitions. [2020-07-20 14:10:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-20 14:10:21,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:10:21,919 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1] [2020-07-20 14:10:22,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:10:22,135 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:10:22,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:10:22,135 INFO L82 PathProgramCache]: Analyzing trace with hash -681057027, now seen corresponding path program 1 times [2020-07-20 14:10:22,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:10:22,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167961119] [2020-07-20 14:10:22,137 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 14:10:22,223 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:10:22,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:10:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 14:10:22,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:10:22,295 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:10:22,297 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:10:24,460 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 14:10:24,513 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 14:10:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:10:24,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:10:24,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:10:24,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:10:24,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167961119] [2020-07-20 14:10:24,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 14:10:24,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 14:10:24,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067166192] [2020-07-20 14:10:24,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:10:24,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:10:24,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:10:24,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:10:24,788 INFO L87 Difference]: Start difference. First operand 590 states and 775 transitions. Second operand 6 states. [2020-07-20 14:14:48,191 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 14:15:36,084 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-07-20 14:18:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:18:23,540 INFO L93 Difference]: Finished difference Result 1939 states and 2669 transitions. [2020-07-20 14:18:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 14:18:23,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2020-07-20 14:18:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:18:23,561 INFO L225 Difference]: With dead ends: 1939 [2020-07-20 14:18:23,561 INFO L226 Difference]: Without dead ends: 1355 [2020-07-20 14:18:23,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-07-20 14:18:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-07-20 14:18:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1333. [2020-07-20 14:18:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2020-07-20 14:18:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1753 transitions. [2020-07-20 14:18:23,628 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1753 transitions. Word has length 123 [2020-07-20 14:18:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:18:23,629 INFO L479 AbstractCegarLoop]: Abstraction has 1333 states and 1753 transitions. [2020-07-20 14:18:23,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:18:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1753 transitions. [2020-07-20 14:18:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-20 14:18:23,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:18:23,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:18:23,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:18:23,849 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:18:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:18:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash -255280675, now seen corresponding path program 1 times [2020-07-20 14:18:23,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:18:23,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818988311] [2020-07-20 14:18:23,850 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 14:18:23,985 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:18:23,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:18:23,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:18:23,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:18:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:18:24,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:18:24,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818988311] [2020-07-20 14:18:24,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:18:24,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:18:24,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977848551] [2020-07-20 14:18:24,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:18:24,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:18:24,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:18:24,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:18:24,130 INFO L87 Difference]: Start difference. First operand 1333 states and 1753 transitions. Second operand 5 states. [2020-07-20 14:18:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:18:29,141 INFO L93 Difference]: Finished difference Result 3437 states and 4825 transitions. [2020-07-20 14:18:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:18:29,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-07-20 14:18:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:18:29,166 INFO L225 Difference]: With dead ends: 3437 [2020-07-20 14:18:29,166 INFO L226 Difference]: Without dead ends: 2253 [2020-07-20 14:18:29,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:18:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2020-07-20 14:18:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2076. [2020-07-20 14:18:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2020-07-20 14:18:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2747 transitions. [2020-07-20 14:18:29,257 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2747 transitions. Word has length 139 [2020-07-20 14:18:29,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:18:29,257 INFO L479 AbstractCegarLoop]: Abstraction has 2076 states and 2747 transitions. [2020-07-20 14:18:29,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:18:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2747 transitions. [2020-07-20 14:18:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-20 14:18:29,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:18:29,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:18:29,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:18:29,476 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:18:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:18:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash -678088530, now seen corresponding path program 1 times [2020-07-20 14:18:29,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:18:29,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087316832] [2020-07-20 14:18:29,479 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 14:18:29,601 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:18:29,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:18:29,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:18:29,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:18:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:18:29,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:18:29,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087316832] [2020-07-20 14:18:29,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:18:29,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:18:29,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866790093] [2020-07-20 14:18:29,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:18:29,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:18:29,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:18:29,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:18:29,657 INFO L87 Difference]: Start difference. First operand 2076 states and 2747 transitions. Second operand 3 states. [2020-07-20 14:18:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:18:33,028 INFO L93 Difference]: Finished difference Result 4583 states and 6192 transitions. [2020-07-20 14:18:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:18:33,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2020-07-20 14:18:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:18:33,053 INFO L225 Difference]: With dead ends: 4583 [2020-07-20 14:18:33,054 INFO L226 Difference]: Without dead ends: 2656 [2020-07-20 14:18:33,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 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 14:18:33,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2020-07-20 14:18:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2656. [2020-07-20 14:18:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2656 states. [2020-07-20 14:18:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 3432 transitions. [2020-07-20 14:18:33,138 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 3432 transitions. Word has length 140 [2020-07-20 14:18:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:18:33,140 INFO L479 AbstractCegarLoop]: Abstraction has 2656 states and 3432 transitions. [2020-07-20 14:18:33,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:18:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 3432 transitions. [2020-07-20 14:18:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-20 14:18:33,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:18:33,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:18:33,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:18:33,359 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:18:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:18:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash -657040215, now seen corresponding path program 1 times [2020-07-20 14:18:33,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:18:33,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788681167] [2020-07-20 14:18:33,361 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 14:18:33,455 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:18:33,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:18:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:18:33,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:18:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:18:33,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:18:33,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788681167] [2020-07-20 14:18:33,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:18:33,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:18:33,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318761703] [2020-07-20 14:18:33,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:18:33,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:18:33,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:18:33,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:18:33,557 INFO L87 Difference]: Start difference. First operand 2656 states and 3432 transitions. Second operand 3 states. [2020-07-20 14:18:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:18:36,862 INFO L93 Difference]: Finished difference Result 3959 states and 5085 transitions. [2020-07-20 14:18:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:18:36,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2020-07-20 14:18:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:18:36,895 INFO L225 Difference]: With dead ends: 3959 [2020-07-20 14:18:36,895 INFO L226 Difference]: Without dead ends: 3957 [2020-07-20 14:18:36,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 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 14:18:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2020-07-20 14:18:37,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3099. [2020-07-20 14:18:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3099 states. [2020-07-20 14:18:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 4046 transitions. [2020-07-20 14:18:37,034 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 4046 transitions. Word has length 181 [2020-07-20 14:18:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:18:37,035 INFO L479 AbstractCegarLoop]: Abstraction has 3099 states and 4046 transitions. [2020-07-20 14:18:37,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:18:37,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 4046 transitions. [2020-07-20 14:18:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-07-20 14:18:37,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:18:37,042 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:18:37,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:18:37,257 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:18:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:18:37,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1538101510, now seen corresponding path program 1 times [2020-07-20 14:18:37,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:18:37,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943269219] [2020-07-20 14:18:37,258 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 14:18:37,363 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:18:37,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:18:37,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:18:37,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:18:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:18:37,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:18:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:18:37,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943269219] [2020-07-20 14:18:37,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:18:37,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 14:18:37,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285703709] [2020-07-20 14:18:37,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:18:37,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:18:37,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:18:37,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:18:37,808 INFO L87 Difference]: Start difference. First operand 3099 states and 4046 transitions. Second operand 7 states. [2020-07-20 14:18:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:18:46,117 INFO L93 Difference]: Finished difference Result 7198 states and 10200 transitions. [2020-07-20 14:18:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 14:18:46,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 193 [2020-07-20 14:18:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:18:46,148 INFO L225 Difference]: With dead ends: 7198 [2020-07-20 14:18:46,148 INFO L226 Difference]: Without dead ends: 4105 [2020-07-20 14:18:46,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 384 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:18:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4105 states. [2020-07-20 14:18:46,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4105 to 3540. [2020-07-20 14:18:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3540 states. [2020-07-20 14:18:46,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4540 transitions. [2020-07-20 14:18:46,292 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4540 transitions. Word has length 193 [2020-07-20 14:18:46,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:18:46,292 INFO L479 AbstractCegarLoop]: Abstraction has 3540 states and 4540 transitions. [2020-07-20 14:18:46,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:18:46,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4540 transitions. [2020-07-20 14:18:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-07-20 14:18:46,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:18:46,298 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:18:46,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:18:46,511 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:18:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:18:46,512 INFO L82 PathProgramCache]: Analyzing trace with hash -958838712, now seen corresponding path program 1 times [2020-07-20 14:18:46,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:18:46,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523202328] [2020-07-20 14:18:46,514 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 14:18:46,620 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:18:46,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:18:46,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:18:46,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:18:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:18:46,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:18:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:18:47,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523202328] [2020-07-20 14:18:47,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:18:47,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 14:18:47,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158524264] [2020-07-20 14:18:47,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:18:47,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:18:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:18:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:18:47,120 INFO L87 Difference]: Start difference. First operand 3540 states and 4540 transitions. Second operand 7 states. [2020-07-20 14:18:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:18:53,358 INFO L93 Difference]: Finished difference Result 6943 states and 8949 transitions. [2020-07-20 14:18:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 14:18:53,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 205 [2020-07-20 14:18:53,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:18:53,383 INFO L225 Difference]: With dead ends: 6943 [2020-07-20 14:18:53,383 INFO L226 Difference]: Without dead ends: 3409 [2020-07-20 14:18:53,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:18:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2020-07-20 14:18:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2827. [2020-07-20 14:18:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2827 states. [2020-07-20 14:18:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 3271 transitions. [2020-07-20 14:18:53,519 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 3271 transitions. Word has length 205 [2020-07-20 14:18:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:18:53,520 INFO L479 AbstractCegarLoop]: Abstraction has 2827 states and 3271 transitions. [2020-07-20 14:18:53,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:18:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 3271 transitions. [2020-07-20 14:18:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-07-20 14:18:53,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:18:53,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:18:53,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:18:53,740 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:18:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:18:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash 590569913, now seen corresponding path program 1 times [2020-07-20 14:18:53,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:18:53,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112803999] [2020-07-20 14:18:53,742 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 14:18:53,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:18:53,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:18:53,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:18:53,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:18:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-20 14:18:54,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:18:54,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112803999] [2020-07-20 14:18:54,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:18:54,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:18:54,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875494452] [2020-07-20 14:18:54,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:18:54,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:18:54,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:18:54,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:18:54,011 INFO L87 Difference]: Start difference. First operand 2827 states and 3271 transitions. Second operand 3 states. [2020-07-20 14:18:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:18:57,272 INFO L93 Difference]: Finished difference Result 6508 states and 7549 transitions. [2020-07-20 14:18:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:18:57,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2020-07-20 14:18:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:18:57,289 INFO L225 Difference]: With dead ends: 6508 [2020-07-20 14:18:57,289 INFO L226 Difference]: Without dead ends: 2815 [2020-07-20 14:18:57,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 220 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 14:18:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2020-07-20 14:18:57,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2815. [2020-07-20 14:18:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2815 states. [2020-07-20 14:18:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 3233 transitions. [2020-07-20 14:18:57,360 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 3233 transitions. Word has length 222 [2020-07-20 14:18:57,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:18:57,361 INFO L479 AbstractCegarLoop]: Abstraction has 2815 states and 3233 transitions. [2020-07-20 14:18:57,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:18:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 3233 transitions. [2020-07-20 14:18:57,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-07-20 14:18:57,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:18:57,369 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:18:57,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:18:57,574 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:18:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:18:57,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1367628375, now seen corresponding path program 1 times [2020-07-20 14:18:57,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:18:57,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114938804] [2020-07-20 14:18:57,575 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 14:18:57,786 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:18:57,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:18:57,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 14:18:57,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:18:57,845 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 3, 1] term [2020-07-20 14:18:57,845 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 14:18:57,847 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 14:18:57,847 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:18:57,848 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:18:57,851 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:18:57,851 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:18:57,854 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:18:57,856 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 14:19:21,665 WARN L193 SmtUtils]: Spent 23.74 s on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2020-07-20 14:19:21,716 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:19:21,816 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:19:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 247 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:21,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:19:22,212 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2020-07-20 14:19:22,717 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-07-20 14:19:23,084 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-07-20 14:19:23,199 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 14:19:23,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:19:23,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:19:23,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:19:23,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:19:23,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:19:23,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-20 14:19:23,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:19:23,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:19:23,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:19:23,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:19:23,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:19:23,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:19:23,413 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 14:19:23,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:19:23,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:19:23,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:19:23,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 14:19:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 247 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:23,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114938804] [2020-07-20 14:19:23,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:19:23,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-20 14:19:23,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134743871] [2020-07-20 14:19:23,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 14:19:23,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:23,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 14:19:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:19:23,882 INFO L87 Difference]: Start difference. First operand 2815 states and 3233 transitions. Second operand 12 states. [2020-07-20 14:19:26,057 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 14:19:30,547 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2020-07-20 14:19:31,196 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2020-07-20 14:19:36,181 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-20 14:19:38,808 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-07-20 14:19:41,607 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 14:19:45,812 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2020-07-20 14:19:48,658 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 14:19:52,711 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 14:19:53,710 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2020-07-20 14:19:58,015 WARN L193 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 14:20:03,023 WARN L193 SmtUtils]: Spent 3.66 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-07-20 14:20:06,926 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2020-07-20 14:20:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:16,034 INFO L93 Difference]: Finished difference Result 7409 states and 9083 transitions. [2020-07-20 14:20:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-20 14:20:16,042 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 279 [2020-07-20 14:20:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:16,042 INFO L225 Difference]: With dead ends: 7409 [2020-07-20 14:20:16,043 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 14:20:16,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 566 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=614, Invalid=1736, Unknown=2, NotChecked=0, Total=2352 [2020-07-20 14:20:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 14:20:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 14:20:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 14:20:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 14:20:16,065 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 279 [2020-07-20 14:20:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:16,066 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 14:20:16,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 14:20:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 14:20:16,066 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 14:20:16,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:16,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 14:20:17,570 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 185 [2020-07-20 14:20:17,915 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 185 [2020-07-20 14:20:18,025 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2020-07-20 14:20:18,321 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-20 14:20:24,578 WARN L193 SmtUtils]: Spent 6.24 s on a formula simplification. DAG size of input: 200 DAG size of output: 65 [2020-07-20 14:20:27,079 WARN L193 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 180 DAG size of output: 36 [2020-07-20 14:20:29,531 WARN L193 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 180 DAG size of output: 36 [2020-07-20 14:20:29,538 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 14:20:29,539 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (<= ~a10~0 |old(~a10~0)|) (<= |old(~a10~0)| ~a10~0) (<= |old(~a1~0)| ~a1~0) (<= ~a19~0 |old(~a19~0)|)) [2020-07-20 14:20:29,539 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:20:29,539 INFO L268 CegarLoopResult]: For program point L465(lines 465 572) no Hoare annotation was computed. [2020-07-20 14:20:29,539 INFO L268 CegarLoopResult]: For program point L201-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,540 INFO L268 CegarLoopResult]: For program point L168-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L135-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L102-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L69-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L36-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L499(lines 499 572) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L301(lines 301 572) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L202(line 202) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L169(line 169) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L136(line 136) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L103(line 103) no Hoare annotation was computed. [2020-07-20 14:20:29,541 INFO L268 CegarLoopResult]: For program point L70(line 70) no Hoare annotation was computed. [2020-07-20 14:20:29,542 INFO L268 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-07-20 14:20:29,543 INFO L268 CegarLoopResult]: For program point L335(lines 335 572) no Hoare annotation was computed. [2020-07-20 14:20:29,543 INFO L268 CegarLoopResult]: For program point L236(lines 236 572) no Hoare annotation was computed. [2020-07-20 14:20:29,544 INFO L268 CegarLoopResult]: For program point L534(lines 534 572) no Hoare annotation was computed. [2020-07-20 14:20:29,544 INFO L268 CegarLoopResult]: For program point L171-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,544 INFO L268 CegarLoopResult]: For program point L138-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,544 INFO L268 CegarLoopResult]: For program point L105-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,544 INFO L268 CegarLoopResult]: For program point L72-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,545 INFO L268 CegarLoopResult]: For program point L39-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,545 INFO L268 CegarLoopResult]: For program point L436(lines 436 572) no Hoare annotation was computed. [2020-07-20 14:20:29,545 INFO L268 CegarLoopResult]: For program point L403(lines 403 572) no Hoare annotation was computed. [2020-07-20 14:20:29,545 INFO L268 CegarLoopResult]: For program point L370(lines 370 572) no Hoare annotation was computed. [2020-07-20 14:20:29,545 INFO L268 CegarLoopResult]: For program point L271(lines 271 572) no Hoare annotation was computed. [2020-07-20 14:20:29,545 INFO L268 CegarLoopResult]: For program point L172(line 172) no Hoare annotation was computed. [2020-07-20 14:20:29,545 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-07-20 14:20:29,545 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-07-20 14:20:29,545 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-07-20 14:20:29,546 INFO L268 CegarLoopResult]: For program point L40(line 40) no Hoare annotation was computed. [2020-07-20 14:20:29,546 INFO L268 CegarLoopResult]: For program point L569(lines 569 572) no Hoare annotation was computed. [2020-07-20 14:20:29,546 INFO L268 CegarLoopResult]: For program point L239(lines 239 572) no Hoare annotation was computed. [2020-07-20 14:20:29,546 INFO L268 CegarLoopResult]: For program point L504(lines 504 572) no Hoare annotation was computed. [2020-07-20 14:20:29,546 INFO L268 CegarLoopResult]: For program point L471(lines 471 572) no Hoare annotation was computed. [2020-07-20 14:20:29,546 INFO L268 CegarLoopResult]: For program point calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION(line 118) no Hoare annotation was computed. [2020-07-20 14:20:29,546 INFO L268 CegarLoopResult]: For program point L306(lines 306 572) no Hoare annotation was computed. [2020-07-20 14:20:29,548 INFO L268 CegarLoopResult]: For program point L174-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,548 INFO L268 CegarLoopResult]: For program point L141-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,548 INFO L268 CegarLoopResult]: For program point L108-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,548 INFO L268 CegarLoopResult]: For program point L75-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,548 INFO L268 CegarLoopResult]: For program point L42-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,548 INFO L268 CegarLoopResult]: For program point L340(lines 340 572) no Hoare annotation was computed. [2020-07-20 14:20:29,549 INFO L268 CegarLoopResult]: For program point L175(line 175) no Hoare annotation was computed. [2020-07-20 14:20:29,552 INFO L268 CegarLoopResult]: For program point L142(line 142) no Hoare annotation was computed. [2020-07-20 14:20:29,553 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-07-20 14:20:29,553 INFO L268 CegarLoopResult]: For program point L76(line 76) no Hoare annotation was computed. [2020-07-20 14:20:29,553 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-20 14:20:29,553 INFO L268 CegarLoopResult]: For program point L540(lines 540 572) no Hoare annotation was computed. [2020-07-20 14:20:29,553 INFO L268 CegarLoopResult]: For program point L408(lines 408 572) no Hoare annotation was computed. [2020-07-20 14:20:29,553 INFO L268 CegarLoopResult]: For program point L375(lines 375 572) no Hoare annotation was computed. [2020-07-20 14:20:29,554 INFO L268 CegarLoopResult]: For program point L210(lines 210 572) no Hoare annotation was computed. [2020-07-20 14:20:29,554 INFO L268 CegarLoopResult]: For program point L177-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,555 INFO L268 CegarLoopResult]: For program point L144-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,555 INFO L268 CegarLoopResult]: For program point L111-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,557 INFO L268 CegarLoopResult]: For program point L78-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,557 INFO L268 CegarLoopResult]: For program point L45-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,558 INFO L268 CegarLoopResult]: For program point L442(lines 442 572) no Hoare annotation was computed. [2020-07-20 14:20:29,558 INFO L268 CegarLoopResult]: For program point L277(lines 277 572) no Hoare annotation was computed. [2020-07-20 14:20:29,558 INFO L268 CegarLoopResult]: For program point L244(lines 244 572) no Hoare annotation was computed. [2020-07-20 14:20:29,558 INFO L268 CegarLoopResult]: For program point L178(line 178) no Hoare annotation was computed. [2020-07-20 14:20:29,558 INFO L268 CegarLoopResult]: For program point L145(line 145) no Hoare annotation was computed. [2020-07-20 14:20:29,558 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-07-20 14:20:29,558 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-07-20 14:20:29,558 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-07-20 14:20:29,558 INFO L268 CegarLoopResult]: For program point L509(lines 509 572) no Hoare annotation was computed. [2020-07-20 14:20:29,559 INFO L268 CegarLoopResult]: For program point L476(lines 476 572) no Hoare annotation was computed. [2020-07-20 14:20:29,559 INFO L268 CegarLoopResult]: For program point L378(lines 378 572) no Hoare annotation was computed. [2020-07-20 14:20:29,559 INFO L268 CegarLoopResult]: For program point L345(lines 345 572) no Hoare annotation was computed. [2020-07-20 14:20:29,559 INFO L268 CegarLoopResult]: For program point L312(lines 312 572) no Hoare annotation was computed. [2020-07-20 14:20:29,559 INFO L268 CegarLoopResult]: For program point L180-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,559 INFO L268 CegarLoopResult]: For program point L147-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,559 INFO L268 CegarLoopResult]: For program point L114-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,559 INFO L268 CegarLoopResult]: For program point L81-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,560 INFO L268 CegarLoopResult]: For program point L48-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,560 INFO L268 CegarLoopResult]: For program point L181(line 181) no Hoare annotation was computed. [2020-07-20 14:20:29,560 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-07-20 14:20:29,560 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-20 14:20:29,560 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-07-20 14:20:29,560 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-07-20 14:20:29,560 INFO L268 CegarLoopResult]: For program point L545(lines 545 572) no Hoare annotation was computed. [2020-07-20 14:20:29,560 INFO L268 CegarLoopResult]: For program point L215(lines 215 572) no Hoare annotation was computed. [2020-07-20 14:20:29,560 INFO L268 CegarLoopResult]: For program point L414(lines 414 572) no Hoare annotation was computed. [2020-07-20 14:20:29,561 INFO L268 CegarLoopResult]: For program point L249(lines 249 572) no Hoare annotation was computed. [2020-07-20 14:20:29,561 INFO L268 CegarLoopResult]: For program point L183-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,561 INFO L268 CegarLoopResult]: For program point L150-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,561 INFO L268 CegarLoopResult]: For program point L117-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,561 INFO L268 CegarLoopResult]: For program point L84-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,561 INFO L268 CegarLoopResult]: For program point L51-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,561 INFO L268 CegarLoopResult]: For program point calculate_outputFINAL(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,561 INFO L268 CegarLoopResult]: For program point calculate_outputEXIT(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,561 INFO L268 CegarLoopResult]: For program point L514(lines 514 572) no Hoare annotation was computed. [2020-07-20 14:20:29,562 INFO L268 CegarLoopResult]: For program point L481(lines 481 572) no Hoare annotation was computed. [2020-07-20 14:20:29,562 INFO L268 CegarLoopResult]: For program point L448(lines 448 572) no Hoare annotation was computed. [2020-07-20 14:20:29,562 INFO L268 CegarLoopResult]: For program point L283(lines 283 572) no Hoare annotation was computed. [2020-07-20 14:20:29,562 INFO L268 CegarLoopResult]: For program point L184(line 184) no Hoare annotation was computed. [2020-07-20 14:20:29,562 INFO L268 CegarLoopResult]: For program point L151(line 151) no Hoare annotation was computed. [2020-07-20 14:20:29,562 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-07-20 14:20:29,562 INFO L268 CegarLoopResult]: For program point L85(line 85) no Hoare annotation was computed. [2020-07-20 14:20:29,562 INFO L268 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-07-20 14:20:29,562 INFO L268 CegarLoopResult]: For program point L548(lines 548 572) no Hoare annotation was computed. [2020-07-20 14:20:29,563 INFO L268 CegarLoopResult]: For program point L383(lines 383 572) no Hoare annotation was computed. [2020-07-20 14:20:29,564 INFO L268 CegarLoopResult]: For program point L317(lines 317 572) no Hoare annotation was computed. [2020-07-20 14:20:29,566 INFO L268 CegarLoopResult]: For program point L351(lines 351 572) no Hoare annotation was computed. [2020-07-20 14:20:29,566 INFO L268 CegarLoopResult]: For program point L186-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,566 INFO L268 CegarLoopResult]: For program point L153-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,566 INFO L268 CegarLoopResult]: For program point L120-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,566 INFO L268 CegarLoopResult]: For program point L87-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,566 INFO L268 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2020-07-20 14:20:29,566 INFO L268 CegarLoopResult]: For program point L54-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,567 INFO L268 CegarLoopResult]: For program point L21-2(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,567 INFO L268 CegarLoopResult]: For program point L517(lines 517 572) no Hoare annotation was computed. [2020-07-20 14:20:29,567 INFO L268 CegarLoopResult]: For program point L286(lines 286 572) no Hoare annotation was computed. [2020-07-20 14:20:29,567 INFO L268 CegarLoopResult]: For program point L220(lines 220 572) no Hoare annotation was computed. [2020-07-20 14:20:29,567 INFO L268 CegarLoopResult]: For program point L187(line 187) no Hoare annotation was computed. [2020-07-20 14:20:29,567 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-07-20 14:20:29,567 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-07-20 14:20:29,567 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-07-20 14:20:29,569 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-07-20 14:20:29,569 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-20 14:20:29,571 INFO L268 CegarLoopResult]: For program point L419(lines 419 572) no Hoare annotation was computed. [2020-07-20 14:20:29,571 INFO L268 CegarLoopResult]: For program point L320(lines 320 572) no Hoare annotation was computed. [2020-07-20 14:20:29,571 INFO L268 CegarLoopResult]: For program point L254(lines 254 572) no Hoare annotation was computed. [2020-07-20 14:20:29,571 INFO L268 CegarLoopResult]: For program point L354(lines 354 572) no Hoare annotation was computed. [2020-07-20 14:20:29,571 INFO L268 CegarLoopResult]: For program point L189-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,571 INFO L268 CegarLoopResult]: For program point L156-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,571 INFO L268 CegarLoopResult]: For program point L123-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,571 INFO L268 CegarLoopResult]: For program point L90-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,572 INFO L268 CegarLoopResult]: For program point L57-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,572 INFO L268 CegarLoopResult]: For program point L24-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,572 INFO L268 CegarLoopResult]: For program point L487(lines 487 572) no Hoare annotation was computed. [2020-07-20 14:20:29,572 INFO L268 CegarLoopResult]: For program point L454(lines 454 572) no Hoare annotation was computed. [2020-07-20 14:20:29,572 INFO L268 CegarLoopResult]: For program point L388(lines 388 572) no Hoare annotation was computed. [2020-07-20 14:20:29,572 INFO L268 CegarLoopResult]: For program point L190(line 190) no Hoare annotation was computed. [2020-07-20 14:20:29,572 INFO L268 CegarLoopResult]: For program point L157(line 157) no Hoare annotation was computed. [2020-07-20 14:20:29,572 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-07-20 14:20:29,572 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-07-20 14:20:29,573 INFO L268 CegarLoopResult]: For program point L58(line 58) no Hoare annotation was computed. [2020-07-20 14:20:29,573 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-07-20 14:20:29,573 INFO L268 CegarLoopResult]: For program point L554(lines 554 572) no Hoare annotation was computed. [2020-07-20 14:20:29,573 INFO L268 CegarLoopResult]: For program point L323(lines 323 572) no Hoare annotation was computed. [2020-07-20 14:20:29,573 INFO L264 CegarLoopResult]: At program point calculate_outputENTRY(lines 20 574) the Hoare annotation is: (let ((.cse11 (<= ~a10~0 |old(~a10~0)|)) (.cse6 (<= |old(~a10~0)| ~a10~0)) (.cse7 (<= |old(~a1~0)| ~a1~0)) (.cse8 (<= ~a19~0 |old(~a19~0)|))) (let ((.cse0 (not (<= |old(~a19~0)| 9))) (.cse1 (not (<= 2 |old(~a10~0)|))) (.cse3 (not (<= |old(~a1~0)| 23))) (.cse4 (<= ~a1~0 23)) (.cse2 (and .cse11 .cse6 .cse7 .cse8)) (.cse9 (not (<= |old(~a10~0)| 0))) (.cse10 (not (<= 9 |old(~a19~0)|))) (.cse5 (not (<= |old(~a10~0)| 1)))) (and (or (<= ~a10~0 2) .cse0 .cse1 (not (<= |old(~a10~0)| 2))) (or (not (<= 4 |old(~a10~0)|)) .cse2 .cse0) (or (not (< 0 |old(~a10~0)|)) .cse3 .cse4 .cse5) (or .cse3 .cse2 .cse0) (or (not (<= |old(~a19~0)| 7)) .cse2) (or (not (< 218 |old(~a1~0)|)) .cse2 .cse5) (or .cse3 .cse4 .cse0 .cse1) (or (and .cse6 .cse7 .cse8 (< ~a10~0 4)) (not (< |old(~a10~0)| 4)) .cse0 .cse1) (or .cse3 .cse4 .cse9 .cse10) (or .cse2 .cse9) (or .cse10 (and (<= 9 ~a19~0) .cse11 .cse6 .cse7 .cse8) .cse5)))) [2020-07-20 14:20:29,573 INFO L268 CegarLoopResult]: For program point L357(lines 357 572) no Hoare annotation was computed. [2020-07-20 14:20:29,573 INFO L268 CegarLoopResult]: For program point L291(lines 291 572) no Hoare annotation was computed. [2020-07-20 14:20:29,574 INFO L268 CegarLoopResult]: For program point L225(lines 225 572) no Hoare annotation was computed. [2020-07-20 14:20:29,574 INFO L268 CegarLoopResult]: For program point L192-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,574 INFO L268 CegarLoopResult]: For program point L159-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,574 INFO L268 CegarLoopResult]: For program point L126-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,574 INFO L268 CegarLoopResult]: For program point L93-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,574 INFO L268 CegarLoopResult]: For program point L60-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,574 INFO L268 CegarLoopResult]: For program point L27-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,574 INFO L268 CegarLoopResult]: For program point L523(lines 523 572) no Hoare annotation was computed. [2020-07-20 14:20:29,575 INFO L268 CegarLoopResult]: For program point L193(line 193) no Hoare annotation was computed. [2020-07-20 14:20:29,575 INFO L268 CegarLoopResult]: For program point L160(line 160) no Hoare annotation was computed. [2020-07-20 14:20:29,575 INFO L268 CegarLoopResult]: For program point L127(line 127) no Hoare annotation was computed. [2020-07-20 14:20:29,575 INFO L268 CegarLoopResult]: For program point L94(line 94) no Hoare annotation was computed. [2020-07-20 14:20:29,575 INFO L268 CegarLoopResult]: For program point L61(line 61) no Hoare annotation was computed. [2020-07-20 14:20:29,575 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-20 14:20:29,575 INFO L268 CegarLoopResult]: For program point L557(lines 557 572) no Hoare annotation was computed. [2020-07-20 14:20:29,575 INFO L268 CegarLoopResult]: For program point L425(lines 425 572) no Hoare annotation was computed. [2020-07-20 14:20:29,575 INFO L268 CegarLoopResult]: For program point L326(lines 326 572) no Hoare annotation was computed. [2020-07-20 14:20:29,576 INFO L268 CegarLoopResult]: For program point L260(lines 260 572) no Hoare annotation was computed. [2020-07-20 14:20:29,576 INFO L268 CegarLoopResult]: For program point L393(lines 393 572) no Hoare annotation was computed. [2020-07-20 14:20:29,576 INFO L268 CegarLoopResult]: For program point L360(lines 360 572) no Hoare annotation was computed. [2020-07-20 14:20:29,576 INFO L268 CegarLoopResult]: For program point L195-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,576 INFO L268 CegarLoopResult]: For program point L162-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,576 INFO L268 CegarLoopResult]: For program point L129-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,576 INFO L268 CegarLoopResult]: For program point L96-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,576 INFO L268 CegarLoopResult]: For program point L63-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,576 INFO L268 CegarLoopResult]: For program point L30-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,577 INFO L268 CegarLoopResult]: For program point L526(lines 526 572) no Hoare annotation was computed. [2020-07-20 14:20:29,577 INFO L268 CegarLoopResult]: For program point L493(lines 493 572) no Hoare annotation was computed. [2020-07-20 14:20:29,577 INFO L268 CegarLoopResult]: For program point L460(lines 460 572) no Hoare annotation was computed. [2020-07-20 14:20:29,577 INFO L268 CegarLoopResult]: For program point L196(line 196) no Hoare annotation was computed. [2020-07-20 14:20:29,577 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-07-20 14:20:29,577 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-07-20 14:20:29,579 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-20 14:20:29,579 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-07-20 14:20:29,579 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-20 14:20:29,579 INFO L268 CegarLoopResult]: For program point L329(lines 329 572) no Hoare annotation was computed. [2020-07-20 14:20:29,579 INFO L268 CegarLoopResult]: For program point L296(lines 296 572) no Hoare annotation was computed. [2020-07-20 14:20:29,579 INFO L268 CegarLoopResult]: For program point L231(lines 231 572) no Hoare annotation was computed. [2020-07-20 14:20:29,580 INFO L268 CegarLoopResult]: For program point L198-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,580 INFO L268 CegarLoopResult]: For program point L165-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,580 INFO L268 CegarLoopResult]: For program point L132-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,580 INFO L268 CegarLoopResult]: For program point L99-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,580 INFO L268 CegarLoopResult]: For program point L66-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,580 INFO L268 CegarLoopResult]: For program point L33-1(lines 20 574) no Hoare annotation was computed. [2020-07-20 14:20:29,580 INFO L268 CegarLoopResult]: For program point L529(lines 529 572) no Hoare annotation was computed. [2020-07-20 14:20:29,580 INFO L268 CegarLoopResult]: For program point L430(lines 430 572) no Hoare annotation was computed. [2020-07-20 14:20:29,581 INFO L268 CegarLoopResult]: For program point L265(lines 265 572) no Hoare annotation was computed. [2020-07-20 14:20:29,581 INFO L268 CegarLoopResult]: For program point L199(line 199) no Hoare annotation was computed. [2020-07-20 14:20:29,581 INFO L268 CegarLoopResult]: For program point L166(line 166) no Hoare annotation was computed. [2020-07-20 14:20:29,581 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-07-20 14:20:29,581 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-20 14:20:29,581 INFO L268 CegarLoopResult]: For program point L67(line 67) no Hoare annotation was computed. [2020-07-20 14:20:29,581 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-20 14:20:29,581 INFO L268 CegarLoopResult]: For program point L563(lines 563 572) no Hoare annotation was computed. [2020-07-20 14:20:29,581 INFO L268 CegarLoopResult]: For program point L398(lines 398 572) no Hoare annotation was computed. [2020-07-20 14:20:29,582 INFO L268 CegarLoopResult]: For program point L365(lines 365 572) no Hoare annotation was computed. [2020-07-20 14:20:29,582 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:20:29,582 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~a10~0 0) (<= ~a19~0 9) (<= 9 ~a19~0) (<= ~a1~0 23) (<= 23 ~a1~0)) [2020-07-20 14:20:29,582 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 14:20:29,582 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 14:20:29,582 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 576 592) the Hoare annotation is: (or (not (<= 23 |old(~a1~0)|)) (not (<= |old(~a1~0)| 23)) (not (<= |old(~a10~0)| 0)) (not (<= 9 |old(~a19~0)|)) (not (<= |old(~a19~0)| 9)) (and (<= 9 ~a19~0) (<= ~a10~0 |old(~a10~0)|) (<= ~a1~0 23) (<= |old(~a10~0)| ~a10~0) (<= ~a19~0 |old(~a19~0)|) (<= 23 ~a1~0))) [2020-07-20 14:20:29,582 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 576 592) no Hoare annotation was computed. [2020-07-20 14:20:29,583 INFO L264 CegarLoopResult]: At program point L590(line 590) the Hoare annotation is: (let ((.cse0 (<= ~a19~0 9))) (or (<= ~a10~0 0) (and .cse0 (<= ~a1~0 23)) (not (<= 23 |old(~a1~0)|)) (not (<= |old(~a1~0)| 23)) (and .cse0 (< 218 ~a1~0)) (not (<= |old(~a10~0)| 0)) (not (<= 9 |old(~a19~0)|)) (and (<= ~a10~0 1) (<= 9 ~a19~0)) (and .cse0 (<= 2 ~a10~0)) (not (<= |old(~a19~0)| 9)) (<= ~a19~0 7))) [2020-07-20 14:20:29,583 INFO L268 CegarLoopResult]: For program point L590-1(line 590) no Hoare annotation was computed. [2020-07-20 14:20:29,583 INFO L268 CegarLoopResult]: For program point L587(line 587) no Hoare annotation was computed. [2020-07-20 14:20:29,583 INFO L264 CegarLoopResult]: At program point L582-2(lines 582 591) the Hoare annotation is: (let ((.cse0 (<= ~a19~0 9))) (or (<= ~a10~0 0) (and .cse0 (<= ~a1~0 23)) (not (<= 23 |old(~a1~0)|)) (not (<= |old(~a1~0)| 23)) (and .cse0 (< 218 ~a1~0)) (not (<= |old(~a10~0)| 0)) (not (<= 9 |old(~a19~0)|)) (and (<= ~a10~0 1) (<= 9 ~a19~0)) (and .cse0 (<= 2 ~a10~0)) (not (<= |old(~a19~0)| 9)) (<= ~a19~0 7))) [2020-07-20 14:20:29,583 INFO L268 CegarLoopResult]: For program point L582-3(lines 576 592) no Hoare annotation was computed. [2020-07-20 14:20:29,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:20:29 BoogieIcfgContainer [2020-07-20 14:20:29,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:20:29,615 INFO L168 Benchmark]: Toolchain (without parser) took 612816.71 ms. Allocated memory was 139.5 MB in the beginning and 320.3 MB in the end (delta: 180.9 MB). Free memory was 103.0 MB in the beginning and 175.5 MB in the end (delta: -72.5 MB). Peak memory consumption was 239.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:20:29,625 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 14:20:29,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 776.06 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 102.6 MB in the beginning and 168.5 MB in the end (delta: -65.9 MB). Peak memory consumption was 35.4 MB. Max. memory is 7.1 GB. [2020-07-20 14:20:29,630 INFO L168 Benchmark]: Boogie Preprocessor took 114.00 ms. Allocated memory is still 201.3 MB. Free memory was 168.5 MB in the beginning and 163.5 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2020-07-20 14:20:29,634 INFO L168 Benchmark]: RCFGBuilder took 1301.73 ms. Allocated memory was 201.3 MB in the beginning and 237.0 MB in the end (delta: 35.7 MB). Free memory was 163.5 MB in the beginning and 179.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 81.1 MB. Max. memory is 7.1 GB. [2020-07-20 14:20:29,634 INFO L168 Benchmark]: TraceAbstraction took 610619.42 ms. Allocated memory was 237.0 MB in the beginning and 320.3 MB in the end (delta: 83.4 MB). Free memory was 179.0 MB in the beginning and 175.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 217.9 MB. Max. memory is 7.1 GB. [2020-07-20 14:20:29,638 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 776.06 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 102.6 MB in the beginning and 168.5 MB in the end (delta: -65.9 MB). Peak memory consumption was 35.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.00 ms. Allocated memory is still 201.3 MB. Free memory was 168.5 MB in the beginning and 163.5 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1301.73 ms. Allocated memory was 201.3 MB in the beginning and 237.0 MB in the end (delta: 35.7 MB). Free memory was 163.5 MB in the beginning and 179.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 81.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 610619.42 ms. Allocated memory was 237.0 MB in the beginning and 320.3 MB in the end (delta: 83.4 MB). Free memory was 179.0 MB in the beginning and 175.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 217.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 118]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 582]: Loop Invariant Derived loop invariant: (((((((((a10 <= 0 || (a19 <= 9 && a1 <= 23)) || !(23 <= \old(a1))) || !(\old(a1) <= 23)) || (a19 <= 9 && 218 < a1)) || !(\old(a10) <= 0)) || !(9 <= \old(a19))) || (a10 <= 1 && 9 <= a19)) || (a19 <= 9 && 2 <= a10)) || !(\old(a19) <= 9)) || a19 <= 7 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 215 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 597.2s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 562.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 13.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 726 SDtfs, 4169 SDslu, 488 SDs, 0 SdLazy, 8733 SolverSat, 1857 SolverUnsat, 213 SolverUnknown, 0 SolverNotchecked, 489.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2438 GetRequests, 2338 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 56.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3540occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 10 MinimizatonAttempts, 2216 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 198 PreInvPairs, 360 NumberOfFragments, 398 HoareAnnotationTreeSize, 198 FomulaSimplifications, 52364 FormulaSimplificationTreeSizeReduction, 1.6s HoareSimplificationTime, 7 FomulaSimplificationsInter, 12231 FormulaSimplificationTreeSizeReductionInter, 11.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 30.0s InterpolantComputationTime, 1644 NumberOfCodeBlocks, 1644 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 2308 ConstructedInterpolants, 46 QuantifiedInterpolants, 1604544 SizeOfPredicates, 15 NumberOfNonLiveVariables, 3170 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 1387/1595 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...