/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/loop-lit/cggmp2005_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:30:40,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:30:40,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:30:40,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:30:40,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:30:40,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:30:40,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:30:40,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:30:40,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:30:40,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:30:40,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:30:40,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:30:40,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:30:40,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:30:40,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:30:40,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:30:40,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:30:40,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:30:40,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:30:40,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:30:40,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:30:40,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:30:40,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:30:40,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:30:40,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:30:40,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:30:40,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:30:40,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:30:40,052 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 14:30:40,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:30:40,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:30:40,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:30:40,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:30:40,068 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:30:40,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:30:40,069 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:30:40,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:30:40,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:30:40,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:30:40,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:30:40,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:30:40,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:30:40,070 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:30:40,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:30:40,070 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:30:40,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:30:40,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:30:40,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:30:40,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:30:40,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:30:40,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:30:40,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:30:40,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:30:40,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:30:40,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:30:40,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:40,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:30:40,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:30:40,073 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 14:30:40,359 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:30:40,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:30:40,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:30:40,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:30:40,377 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:30:40,378 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-20 14:30:40,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0566c1334/f85d32320c714d8f961df0124ab459f9/FLAGd6198280d [2020-07-20 14:30:40,845 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:30:40,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-20 14:30:40,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0566c1334/f85d32320c714d8f961df0124ab459f9/FLAGd6198280d [2020-07-20 14:30:41,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0566c1334/f85d32320c714d8f961df0124ab459f9 [2020-07-20 14:30:41,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:30:41,265 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:30:41,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:30:41,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:30:41,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:30:41,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:30:41" (1/1) ... [2020-07-20 14:30:41,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48ebf41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41, skipping insertion in model container [2020-07-20 14:30:41,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:30:41" (1/1) ... [2020-07-20 14:30:41,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:30:41,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:30:41,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:30:41,476 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:30:41,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:30:41,509 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:30:41,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41 WrapperNode [2020-07-20 14:30:41,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:30:41,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:30:41,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:30:41,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:30:41,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41" (1/1) ... [2020-07-20 14:30:41,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41" (1/1) ... [2020-07-20 14:30:41,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41" (1/1) ... [2020-07-20 14:30:41,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41" (1/1) ... [2020-07-20 14:30:41,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41" (1/1) ... [2020-07-20 14:30:41,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41" (1/1) ... [2020-07-20 14:30:41,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41" (1/1) ... [2020-07-20 14:30:41,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:30:41,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:30:41,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:30:41,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:30:41,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41" (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 14:30:41,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:30:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:30:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:30:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:30:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:30:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:30:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:30:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:30:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:30:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:30:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:30:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:30:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:30:41,935 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:30:41,935 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:30:41,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:30:41 BoogieIcfgContainer [2020-07-20 14:30:41,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:30:41,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:30:41,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:30:41,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:30:41,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:30:41" (1/3) ... [2020-07-20 14:30:41,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765e2a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:30:41, skipping insertion in model container [2020-07-20 14:30:41,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:41" (2/3) ... [2020-07-20 14:30:41,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765e2a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:30:41, skipping insertion in model container [2020-07-20 14:30:41,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:30:41" (3/3) ... [2020-07-20 14:30:41,949 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i [2020-07-20 14:30:41,964 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:30:41,972 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:30:41,985 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:30:42,007 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:30:42,007 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:30:42,007 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:30:42,007 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:30:42,007 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:30:42,007 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:30:42,008 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:30:42,008 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:30:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 14:30:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:30:42,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:42,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:42,035 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-07-20 14:30:42,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:42,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829013539] [2020-07-20 14:30:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:30:42,124 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:30:42,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:42,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 14:30:42,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:42,162 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 14:30:42,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:30:42,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829013539] [2020-07-20 14:30:42,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:30:42,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:30:42,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884772834] [2020-07-20 14:30:42,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:30:42,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:42,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:30:42,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:30:42,185 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-20 14:30:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:42,229 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-07-20 14:30:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:30:42,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-20 14:30:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:42,240 INFO L225 Difference]: With dead ends: 32 [2020-07-20 14:30:42,241 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 14:30:42,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 14:30:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 14:30:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 14:30:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 14:30:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 14:30:42,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 14:30:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:42,298 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 14:30:42,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:30:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 14:30:42,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 14:30:42,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:42,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:42,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:42,518 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:42,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-07-20 14:30:42,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:42,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741575483] [2020-07-20 14:30:42,520 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 14:30:42,563 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:42,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:42,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 14:30:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:42,697 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 14:30:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:42,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:42,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:42,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741575483] [2020-07-20 14:30:42,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:42,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-20 14:30:42,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320701676] [2020-07-20 14:30:42,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 14:30:42,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:42,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 14:30:42,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:30:42,898 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2020-07-20 14:30:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:43,150 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-20 14:30:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 14:30:43,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-07-20 14:30:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:43,152 INFO L225 Difference]: With dead ends: 21 [2020-07-20 14:30:43,152 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 14:30:43,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 14:30:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 14:30:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 14:30:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 14:30:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 14:30:43,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-20 14:30:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:43,160 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 14:30:43,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 14:30:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 14:30:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 14:30:43,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:43,162 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:43,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:43,376 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:43,377 INFO L82 PathProgramCache]: Analyzing trace with hash -66279700, now seen corresponding path program 2 times [2020-07-20 14:30:43,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:43,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505370743] [2020-07-20 14:30:43,378 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 14:30:43,407 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:43,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:43,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 14:30:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:43,539 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 14:30:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:43,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:43,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:43,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505370743] [2020-07-20 14:30:43,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:43,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 14:30:43,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870230861] [2020-07-20 14:30:43,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 14:30:43,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:43,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 14:30:43,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-07-20 14:30:43,738 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2020-07-20 14:30:44,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:44,175 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-07-20 14:30:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 14:30:44,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2020-07-20 14:30:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:44,178 INFO L225 Difference]: With dead ends: 25 [2020-07-20 14:30:44,178 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 14:30:44,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 14:30:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 14:30:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 14:30:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 14:30:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-20 14:30:44,193 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2020-07-20 14:30:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:44,193 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-20 14:30:44,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 14:30:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-20 14:30:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 14:30:44,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:44,195 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:44,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:44,396 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash -43331668, now seen corresponding path program 3 times [2020-07-20 14:30:44,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:44,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295434582] [2020-07-20 14:30:44,397 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 14:30:44,431 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:44,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-20 14:30:44,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:44,597 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 14:30:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:44,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:44,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:44,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295434582] [2020-07-20 14:30:44,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:44,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2020-07-20 14:30:44,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025425093] [2020-07-20 14:30:44,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 14:30:44,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 14:30:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-07-20 14:30:44,974 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 23 states. [2020-07-20 14:30:46,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:46,114 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-07-20 14:30:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 14:30:46,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2020-07-20 14:30:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:46,116 INFO L225 Difference]: With dead ends: 33 [2020-07-20 14:30:46,116 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 14:30:46,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 14:30:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 14:30:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 14:30:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 14:30:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 14:30:46,127 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 18 [2020-07-20 14:30:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:46,127 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 14:30:46,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 14:30:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 14:30:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 14:30:46,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:46,129 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:46,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:46,343 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:46,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:46,344 INFO L82 PathProgramCache]: Analyzing trace with hash 101712172, now seen corresponding path program 4 times [2020-07-20 14:30:46,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:46,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838343946] [2020-07-20 14:30:46,346 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 14:30:46,386 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:46,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:46,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 98 conjunts are in the unsatisfiable core [2020-07-20 14:30:46,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:46,765 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 14:30:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:46,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:46,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:47,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838343946] [2020-07-20 14:30:47,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:47,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2020-07-20 14:30:47,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803334043] [2020-07-20 14:30:47,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 14:30:47,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:47,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 14:30:47,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 14:30:47,807 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 40 states. [2020-07-20 14:30:48,683 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 14:30:48,952 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2020-07-20 14:30:49,148 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 14:30:49,367 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2020-07-20 14:30:51,508 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-20 14:30:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:30:51,519 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2020-07-20 14:30:51,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 14:30:51,519 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 26 [2020-07-20 14:30:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:30:51,521 INFO L225 Difference]: With dead ends: 49 [2020-07-20 14:30:51,521 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 14:30:51,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1203, Invalid=4199, Unknown=0, NotChecked=0, Total=5402 [2020-07-20 14:30:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 14:30:51,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 14:30:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 14:30:51,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-07-20 14:30:51,542 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 26 [2020-07-20 14:30:51,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:30:51,542 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-07-20 14:30:51,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 14:30:51,542 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-07-20 14:30:51,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 14:30:51,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:30:51,544 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:30:51,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:30:51,745 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:30:51,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:30:51,746 INFO L82 PathProgramCache]: Analyzing trace with hash -868359124, now seen corresponding path program 5 times [2020-07-20 14:30:51,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:30:51,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888704284] [2020-07-20 14:30:51,749 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 14:30:51,815 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:30:51,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:30:51,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 194 conjunts are in the unsatisfiable core [2020-07-20 14:30:51,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:30:52,893 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 14:30:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:53,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:30:53,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:30:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:30:56,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888704284] [2020-07-20 14:30:56,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:30:56,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 72 [2020-07-20 14:30:56,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799522357] [2020-07-20 14:30:56,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-20 14:30:56,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:30:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-20 14:30:56,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=4002, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 14:30:56,335 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 72 states. [2020-07-20 14:30:59,170 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-20 14:30:59,809 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 140 [2020-07-20 14:31:00,386 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-20 14:31:00,917 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 130 [2020-07-20 14:31:01,448 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 14:31:02,110 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 14:31:02,648 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 14:31:03,139 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 14:31:03,648 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-07-20 14:31:04,140 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-20 14:31:04,632 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-07-20 14:31:05,096 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-20 14:31:05,573 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-20 14:31:05,994 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-20 14:31:06,416 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 14:31:06,816 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-20 14:31:07,197 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-20 14:31:07,578 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 14:31:07,946 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 14:31:08,311 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 14:31:08,671 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 14:31:12,476 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-20 14:31:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:31:12,499 INFO L93 Difference]: Finished difference Result 81 states and 112 transitions. [2020-07-20 14:31:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-07-20 14:31:12,500 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 42 [2020-07-20 14:31:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:31:12,505 INFO L225 Difference]: With dead ends: 81 [2020-07-20 14:31:12,505 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 14:31:12,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=4419, Invalid=14487, Unknown=0, NotChecked=0, Total=18906 [2020-07-20 14:31:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 14:31:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 14:31:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 14:31:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-07-20 14:31:12,530 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 42 [2020-07-20 14:31:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:31:12,531 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-07-20 14:31:12,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-20 14:31:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-07-20 14:31:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-20 14:31:12,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:31:12,533 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:31:12,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:31:12,747 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:31:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:31:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1445440044, now seen corresponding path program 6 times [2020-07-20 14:31:12,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:31:12,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529650900] [2020-07-20 14:31:12,749 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 14:31:12,856 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:31:12,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:31:12,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 386 conjunts are in the unsatisfiable core [2020-07-20 14:31:12,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:31:16,801 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 14:31:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:31:17,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:31:17,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:31:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:31:29,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529650900] [2020-07-20 14:31:29,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:31:29,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 135 [2020-07-20 14:31:29,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371746961] [2020-07-20 14:31:29,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2020-07-20 14:31:29,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:31:29,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2020-07-20 14:31:29,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4241, Invalid=13849, Unknown=0, NotChecked=0, Total=18090 [2020-07-20 14:31:29,952 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 135 states. [2020-07-20 14:31:40,361 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 427 [2020-07-20 14:31:42,034 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 428 DAG size of output: 270 [2020-07-20 14:31:44,433 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification that was a NOOP. DAG size: 411 [2020-07-20 14:31:45,898 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 416 DAG size of output: 258 [2020-07-20 14:31:48,264 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 405 [2020-07-20 14:31:50,782 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-07-20 14:31:53,092 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 392 [2020-07-20 14:31:55,403 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 14:31:57,711 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-07-20 14:31:59,982 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2020-07-20 14:32:02,209 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 366 [2020-07-20 14:32:04,435 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-07-20 14:32:06,634 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-07-20 14:32:08,874 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-07-20 14:32:11,161 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-07-20 14:32:13,425 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-07-20 14:32:15,710 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2020-07-20 14:32:17,791 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2020-07-20 14:32:19,898 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-07-20 14:32:22,114 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-07-20 14:32:24,163 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-07-20 14:32:26,214 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-07-20 14:32:28,209 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2020-07-20 14:32:30,198 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-07-20 14:32:32,158 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2020-07-20 14:32:34,068 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2020-07-20 14:32:36,044 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-07-20 14:32:37,962 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-07-20 14:32:39,856 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-07-20 14:32:41,688 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-20 14:32:43,537 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-07-20 14:32:45,307 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-20 14:32:47,066 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-07-20 14:32:48,825 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-07-20 14:32:50,552 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-07-20 14:32:52,257 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-20 14:32:53,933 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 14:32:55,546 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 14:32:57,341 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 14:32:58,943 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 14:33:00,594 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-07-20 14:33:02,262 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-20 14:33:03,762 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-07-20 14:33:05,168 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-20 14:33:06,581 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-20 14:33:08,008 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-20 14:33:09,337 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 14:33:10,670 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-20 14:33:11,982 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-20 14:33:13,154 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 14:33:14,286 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 14:33:15,431 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 14:33:16,515 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 14:33:17,548 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 14:33:18,560 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-20 14:33:19,501 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 14:33:20,412 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 14:33:21,332 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 14:33:22,188 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 14:33:30,139 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 415 [2020-07-20 14:33:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:33:30,160 INFO L93 Difference]: Finished difference Result 145 states and 208 transitions. [2020-07-20 14:33:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-07-20 14:33:30,162 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 74 [2020-07-20 14:33:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:33:30,165 INFO L225 Difference]: With dead ends: 145 [2020-07-20 14:33:30,165 INFO L226 Difference]: Without dead ends: 139 [2020-07-20 14:33:30,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8959 ImplicationChecksByTransitivity, 130.8s TimeCoverageRelationStatistics Valid=16988, Invalid=52972, Unknown=0, NotChecked=0, Total=69960 [2020-07-20 14:33:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-07-20 14:33:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-07-20 14:33:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-07-20 14:33:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-07-20 14:33:30,221 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 74 [2020-07-20 14:33:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:33:30,222 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-07-20 14:33:30,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 135 states. [2020-07-20 14:33:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-07-20 14:33:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-20 14:33:30,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:33:30,225 INFO L422 BasicCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:33:30,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:33:30,439 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:33:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:33:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1338821076, now seen corresponding path program 7 times [2020-07-20 14:33:30,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:33:30,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177161063] [2020-07-20 14:33:30,441 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 14:33:30,653 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:33:30,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:33:30,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 770 conjunts are in the unsatisfiable core [2020-07-20 14:33:30,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:33:54,996 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 14:33:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:33:55,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:33:56,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:35:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:35:38,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177161063] [2020-07-20 14:35:38,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:35:38,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 263 [2020-07-20 14:35:38,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973930858] [2020-07-20 14:35:38,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 263 states [2020-07-20 14:35:38,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:35:38,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2020-07-20 14:35:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16657, Invalid=52249, Unknown=0, NotChecked=0, Total=68906 [2020-07-20 14:35:38,619 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 263 states. [2020-07-20 14:37:43,014 WARN L193 SmtUtils]: Spent 6.84 s on a formula simplification that was a NOOP. DAG size: 843 [2020-07-20 14:37:51,990 WARN L193 SmtUtils]: Spent 7.02 s on a formula simplification. DAG size of input: 844 DAG size of output: 526 [2020-07-20 14:38:33,790 WARN L193 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 827 [2020-07-20 14:38:42,131 WARN L193 SmtUtils]: Spent 6.95 s on a formula simplification. DAG size of input: 832 DAG size of output: 514 [2020-07-20 14:39:24,749 WARN L193 SmtUtils]: Spent 5.98 s on a formula simplification that was a NOOP. DAG size: 821 [2020-07-20 14:40:10,455 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification that was a NOOP. DAG size: 814 [2020-07-20 14:40:56,203 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification that was a NOOP. DAG size: 808 [2020-07-20 14:41:42,091 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification that was a NOOP. DAG size: 801 [2020-07-20 14:42:29,167 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification that was a NOOP. DAG size: 795 [2020-07-20 14:43:15,964 WARN L193 SmtUtils]: Spent 5.83 s on a formula simplification that was a NOOP. DAG size: 788 [2020-07-20 14:44:00,271 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification that was a NOOP. DAG size: 782 [2020-07-20 14:44:47,022 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 775