/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_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:00:57,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:00:57,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:00:57,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:00:57,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:00:57,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:00:57,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:00:57,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:00:57,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:00:57,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:00:57,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:00:57,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:00:57,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:00:57,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:00:57,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:00:57,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:00:57,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:00:57,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:00:57,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:00:57,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:00:57,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:00:57,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:00:57,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:00:57,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:00:57,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:00:57,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:00:57,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:00:57,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:00:57,181 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 [2020-07-21 17:00:57,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:00:57,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:00:57,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:00:57,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:00:57,223 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:00:57,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:00:57,225 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:00:57,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:00:57,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:00:57,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:00:57,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:00:57,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:00:57,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:00:57,227 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:00:57,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:00:57,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:00:57,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:00:57,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:00:57,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:00:57,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:00:57,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:00:57,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:00:57,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:00:57,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:00:57,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:00:57,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:00:57,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:57,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:00:57,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:00:57,232 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_VARIABLES 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 -> 2 [2020-07-21 17:00:57,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:00:57,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:00:57,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:00:57,592 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:00:57,592 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:00:57,593 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-07-21 17:00:57,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0dc90691/50962085714c48d09524b1cf419c68f4/FLAG5a79a4aa3 [2020-07-21 17:00:58,165 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:00:58,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-07-21 17:00:58,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0dc90691/50962085714c48d09524b1cf419c68f4/FLAG5a79a4aa3 [2020-07-21 17:00:58,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0dc90691/50962085714c48d09524b1cf419c68f4 [2020-07-21 17:00:58,550 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:00:58,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:00:58,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:00:58,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:00:58,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:00:58,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:00:58" (1/1) ... [2020-07-21 17:00:58,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6b0a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58, skipping insertion in model container [2020-07-21 17:00:58,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:00:58" (1/1) ... [2020-07-21 17:00:58,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:00:58,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:00:58,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:00:58,808 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:00:58,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:00:58,844 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:00:58,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58 WrapperNode [2020-07-21 17:00:58,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:00:58,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:00:58,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:00:58,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:00:58,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58" (1/1) ... [2020-07-21 17:00:58,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58" (1/1) ... [2020-07-21 17:00:58,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58" (1/1) ... [2020-07-21 17:00:58,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58" (1/1) ... [2020-07-21 17:00:58,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58" (1/1) ... [2020-07-21 17:00:58,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58" (1/1) ... [2020-07-21 17:00:58,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58" (1/1) ... [2020-07-21 17:00:58,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:00:58,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:00:58,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:00:58,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:00:58,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:00:59,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:00:59,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:00:59,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:00:59,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 17:00:59,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:00:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:00:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:00:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:00:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 17:00:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 17:00:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:00:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:00:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:00:59,291 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:00:59,292 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 17:00:59,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:00:59 BoogieIcfgContainer [2020-07-21 17:00:59,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:00:59,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:00:59,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:00:59,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:00:59,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:00:58" (1/3) ... [2020-07-21 17:00:59,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6b54ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:00:59, skipping insertion in model container [2020-07-21 17:00:59,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:58" (2/3) ... [2020-07-21 17:00:59,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6b54ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:00:59, skipping insertion in model container [2020-07-21 17:00:59,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:00:59" (3/3) ... [2020-07-21 17:00:59,304 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-07-21 17:00:59,316 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:00:59,324 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:00:59,339 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:00:59,365 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:00:59,365 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:00:59,366 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:00:59,366 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:00:59,366 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:00:59,366 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:00:59,366 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:00:59,367 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:00:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 17:00:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 17:00:59,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:00:59,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:00:59,394 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:00:59,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:00:59,400 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-07-21 17:00:59,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:00:59,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012161765] [2020-07-21 17:00:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:00:59,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:00:59,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:00:59,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 17:00:59,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:00:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:59,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:00:59,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012161765] [2020-07-21 17:00:59,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:00:59,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 17:00:59,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996149184] [2020-07-21 17:00:59,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 17:00:59,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:00:59,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 17:00:59,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 17:00:59,576 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-21 17:00:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:00:59,607 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-21 17:00:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 17:00:59,609 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 17:00:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:00:59,619 INFO L225 Difference]: With dead ends: 33 [2020-07-21 17:00:59,619 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 17:00:59,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 17:00:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 17:00:59,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 17:00:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 17:00:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-21 17:00:59,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-07-21 17:00:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:00:59,666 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-21 17:00:59,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 17:00:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-21 17:00:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 17:00:59,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:00:59,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:00:59,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:59,883 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:00:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:00:59,884 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-07-21 17:00:59,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:00:59,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873843623] [2020-07-21 17:00:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:00:59,921 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:00:59,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:00:59,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:00:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:00,013 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:01:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:00,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:01:00,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873843623] [2020-07-21 17:01:00,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:01:00,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 17:01:00,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490821470] [2020-07-21 17:01:00,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 17:01:00,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:01:00,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 17:01:00,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:01:00,068 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-07-21 17:01:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:00,171 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-21 17:01:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 17:01:00,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-21 17:01:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:00,176 INFO L225 Difference]: With dead ends: 26 [2020-07-21 17:01:00,176 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 17:01:00,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:01:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 17:01:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-07-21 17:01:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 17:01:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 17:01:00,185 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-07-21 17:01:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:00,186 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 17:01:00,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 17:01:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 17:01:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 17:01:00,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:00,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:00,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:00,399 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:00,402 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-07-21 17:01:00,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:00,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845650452] [2020-07-21 17:01:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:01:00,446 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:01:00,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:00,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 17:01:00,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:00,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:01:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:00,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845650452] [2020-07-21 17:01:00,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:01:00,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-07-21 17:01:00,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468236470] [2020-07-21 17:01:00,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 17:01:00,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:01:00,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 17:01:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-21 17:01:00,587 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2020-07-21 17:01:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:00,718 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-07-21 17:01:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 17:01:00,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-07-21 17:01:00,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:00,720 INFO L225 Difference]: With dead ends: 31 [2020-07-21 17:01:00,720 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 17:01:00,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-21 17:01:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 17:01:00,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-07-21 17:01:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 17:01:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 17:01:00,728 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-07-21 17:01:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:00,728 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 17:01:00,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 17:01:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 17:01:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 17:01:00,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:00,730 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:00,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:00,946 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:00,947 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-07-21 17:01:00,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:00,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307753338] [2020-07-21 17:01:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:01:00,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:01:00,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:00,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 17:01:00,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:01,102 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 17:01:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:01,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:01:01,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:01:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:01,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307753338] [2020-07-21 17:01:01,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:01:01,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-21 17:01:01,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571118636] [2020-07-21 17:01:01,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 17:01:01,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:01:01,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 17:01:01,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-21 17:01:01,447 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 17 states. [2020-07-21 17:01:01,835 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-21 17:01:02,346 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2020-07-21 17:01:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:02,537 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-21 17:01:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 17:01:02,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-07-21 17:01:02,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:02,539 INFO L225 Difference]: With dead ends: 46 [2020-07-21 17:01:02,539 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 17:01:02,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-07-21 17:01:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 17:01:02,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-21 17:01:02,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 17:01:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-21 17:01:02,549 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-07-21 17:01:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:02,549 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-21 17:01:02,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 17:01:02,550 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-21 17:01:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 17:01:02,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:02,551 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:02,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:02,768 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:02,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1027624830, now seen corresponding path program 2 times [2020-07-21 17:01:02,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:02,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901370803] [2020-07-21 17:01:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:01:02,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:01:02,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:02,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 17:01:02,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 17:01:02,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:01:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 17:01:02,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901370803] [2020-07-21 17:01:02,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:01:02,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 17:01:02,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377573879] [2020-07-21 17:01:02,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 17:01:02,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:01:02,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 17:01:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 17:01:02,943 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2020-07-21 17:01:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:03,025 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-07-21 17:01:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 17:01:03,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 17:01:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:03,027 INFO L225 Difference]: With dead ends: 43 [2020-07-21 17:01:03,027 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 17:01:03,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 17:01:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 17:01:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 17:01:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 17:01:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-07-21 17:01:03,035 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2020-07-21 17:01:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:03,036 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-07-21 17:01:03,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 17:01:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-07-21 17:01:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 17:01:03,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:03,037 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:03,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:03,252 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash -490417350, now seen corresponding path program 3 times [2020-07-21 17:01:03,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:03,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203939703] [2020-07-21 17:01:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:01:03,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:01:03,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:03,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 17:01:03,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:03,480 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 17:01:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:03,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:01:03,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:01:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:04,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203939703] [2020-07-21 17:01:04,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:01:04,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-21 17:01:04,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359451873] [2020-07-21 17:01:04,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 17:01:04,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:01:04,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 17:01:04,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-07-21 17:01:04,324 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2020-07-21 17:01:05,100 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-07-21 17:01:05,292 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-07-21 17:01:05,611 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-07-21 17:01:06,364 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:01:06,553 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-21 17:01:07,051 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-07-21 17:01:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:07,599 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-07-21 17:01:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 17:01:07,600 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2020-07-21 17:01:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:07,601 INFO L225 Difference]: With dead ends: 62 [2020-07-21 17:01:07,601 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 17:01:07,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=578, Invalid=2392, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 17:01:07,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 17:01:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 17:01:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 17:01:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-07-21 17:01:07,615 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 29 [2020-07-21 17:01:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:07,615 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-07-21 17:01:07,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 17:01:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-07-21 17:01:07,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 17:01:07,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:07,617 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:07,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:07,819 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:07,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2033682622, now seen corresponding path program 4 times [2020-07-21 17:01:07,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:07,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089757335] [2020-07-21 17:01:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:01:07,865 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:01:07,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:07,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-21 17:01:07,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:08,415 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 17:01:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:08,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:01:08,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:01:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:10,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089757335] [2020-07-21 17:01:10,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:01:10,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-21 17:01:10,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001681719] [2020-07-21 17:01:10,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-21 17:01:10,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:01:10,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-21 17:01:10,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 17:01:10,886 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2020-07-21 17:01:13,407 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 17:01:14,190 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:14,381 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:01:14,789 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:15,036 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:15,259 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 17:01:15,470 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:15,668 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:01:15,889 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:01:16,354 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 17:01:16,605 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-07-21 17:01:16,827 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 17:01:17,033 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 17:01:17,284 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 17:01:17,483 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 17:01:17,721 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 17:01:18,156 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 17:01:18,353 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 17:01:18,581 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:01:18,792 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:01:19,030 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 17:01:19,272 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 17:01:19,500 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 17:01:19,711 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 17:01:19,998 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 17:01:20,327 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 17:01:20,689 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 17:01:20,942 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 17:01:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:21,423 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-07-21 17:01:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-21 17:01:21,425 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2020-07-21 17:01:21,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:21,426 INFO L225 Difference]: With dead ends: 114 [2020-07-21 17:01:21,427 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 17:01:21,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2424, Invalid=9786, Unknown=0, NotChecked=0, Total=12210 [2020-07-21 17:01:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 17:01:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-07-21 17:01:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 17:01:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-07-21 17:01:21,449 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 53 [2020-07-21 17:01:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:21,450 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-07-21 17:01:21,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-21 17:01:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-07-21 17:01:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-21 17:01:21,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:21,453 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:21,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:21,659 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1181026478, now seen corresponding path program 5 times [2020-07-21 17:01:21,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:21,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084440159] [2020-07-21 17:01:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:01:21,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:01:21,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:21,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 98 conjunts are in the unsatisfiable core [2020-07-21 17:01:21,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:23,733 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 17:01:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:23,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:01:24,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:01:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:33,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084440159] [2020-07-21 17:01:33,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:01:33,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 101 [2020-07-21 17:01:33,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960941057] [2020-07-21 17:01:33,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-21 17:01:33,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:01:33,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-21 17:01:33,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7951, Unknown=0, NotChecked=0, Total=10100 [2020-07-21 17:01:33,186 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2020-07-21 17:01:38,704 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 17:01:39,037 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 17:01:39,345 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 17:01:39,619 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-07-21 17:01:39,893 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-21 17:01:40,622 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 17:01:40,934 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:01:41,291 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:41,569 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:01:41,913 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:42,210 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:42,558 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:42,914 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 17:01:43,274 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:43,598 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:01:43,938 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:01:44,235 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:01:44,631 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 17:01:45,109 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 17:01:45,582 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 17:01:46,003 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 17:01:46,502 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:46,906 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:47,380 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:47,859 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:01:48,327 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:48,765 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:01:49,275 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:49,716 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:50,210 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:50,721 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:01:51,132 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:51,492 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:01:51,953 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:52,399 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:52,942 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:53,440 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:01:53,943 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:54,352 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:01:54,818 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:55,231 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:55,699 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:56,248 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:01:56,818 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:57,280 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:01:57,854 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:58,319 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:01:58,895 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:01:59,555 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:02:00,164 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:02:00,664 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:02:01,278 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:02:01,741 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:02:02,263 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:02:02,826 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:02:03,436 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:02:03,967 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:02:04,629 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:02:05,188 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:02:05,829 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:02:06,653 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:02:07,308 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:02:07,857 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:02:08,475 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:02:09,030 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:02:09,697 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 17:02:10,418 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 17:02:11,082 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 17:02:11,665 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:02:12,374 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 17:02:12,924 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 17:02:13,554 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 17:02:14,272 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 17:02:15,039 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 17:02:15,664 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 17:02:16,423 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:02:17,069 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:02:18,076 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 17:02:19,021 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 17:02:19,758 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 17:02:20,436 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 17:02:21,150 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 17:02:21,781 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 17:02:22,518 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 17:02:23,295 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 17:02:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:02:24,589 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2020-07-21 17:02:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2020-07-21 17:02:24,591 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2020-07-21 17:02:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:02:24,593 INFO L225 Difference]: With dead ends: 218 [2020-07-21 17:02:24,593 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 17:02:24,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12145 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=10004, Invalid=39502, Unknown=0, NotChecked=0, Total=49506 [2020-07-21 17:02:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 17:02:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 17:02:24,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 17:02:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2020-07-21 17:02:24,631 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 101 [2020-07-21 17:02:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:02:24,631 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2020-07-21 17:02:24,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-21 17:02:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2020-07-21 17:02:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-21 17:02:24,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:02:24,635 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:02:24,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:02:24,837 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:02:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:02:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1984747378, now seen corresponding path program 6 times [2020-07-21 17:02:24,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:02:24,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935700788] [2020-07-21 17:02:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:02:24,959 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:02:24,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:02:24,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 194 conjunts are in the unsatisfiable core [2020-07-21 17:02:24,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:02:37,522 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 17:02:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:02:38,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:02:38,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:02:40,279 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 17:03:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:03:52,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935700788] [2020-07-21 17:03:52,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:03:52,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 197 [2020-07-21 17:03:52,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108510439] [2020-07-21 17:03:52,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2020-07-21 17:03:52,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:03:52,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2020-07-21 17:03:52,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8621, Invalid=29991, Unknown=0, NotChecked=0, Total=38612 [2020-07-21 17:03:52,505 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 197 states. [2020-07-21 17:04:47,638 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-07-21 17:04:48,645 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-07-21 17:04:50,355 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 17:04:51,812 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 17:04:53,003 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 17:04:54,363 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-07-21 17:04:55,369 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-21 17:04:56,614 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 17:04:57,992 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 17:04:59,582 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 17:05:01,503 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:05:03,125 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:05:04,539 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:05:06,179 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:05:07,854 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:05:09,721 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:05:11,853 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 17:05:13,473 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:05:14,922 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:05:17,000 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:05:18,787 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:05:20,661 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 17:05:22,782 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 17:05:24,549 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 17:05:26,068 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 17:05:27,809 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:05:29,582 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:05:31,561 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:05:33,803 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:05:35,626 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:05:37,208 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:05:39,123 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:05:40,846 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:05:42,766 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:05:44,992 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:05:47,342 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:05:49,164 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:05:51,376 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:05:53,179 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:05:55,124 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:05:57,329 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:05:59,391 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:06:01,133 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:06:03,262 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:06:05,084 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:06:07,220 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:06:09,691 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:06:11,885 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:06:13,613 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:06:15,893 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:06:17,802 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:06:19,896 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:06:22,347 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:06:24,166 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:06:25,712 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:06:28,047 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:06:29,884 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:06:32,056 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:06:34,688 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:06:36,752 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:06:38,558 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:06:40,635 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:06:42,600 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:06:45,015 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:06:47,759 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:06:49,857 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:06:51,736 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:06:54,254 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:06:56,232 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:06:58,384 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:07:01,478 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:07:03,754 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:07:05,779 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:07:08,085 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:07:10,201 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:07:12,546 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:07:15,544 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:07:17,574 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:07:19,428 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:07:21,954 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:07:24,421 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:07:27,028 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:07:30,046 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:07:32,214 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:07:34,189 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:07:36,647 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:07:39,112 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:07:41,778 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:07:44,920 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:07:47,980 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:07:50,443 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:07:53,288 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:07:55,848 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:07:58,715 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:08:01,938 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:08:04,598 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:08:06,978 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:08:09,642 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:08:12,366 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:08:15,056 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:08:19,202 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:08:22,231 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:08:24,908 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:08:28,350 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:08:31,021 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:08:33,695 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:08:36,964 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:08:39,218 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:08:41,228 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:08:43,720 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:08:45,996 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:08:48,846 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:08:52,049 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:08:54,993 WARN L193 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:08:57,433 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:09:00,436 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:09:03,100 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:09:05,931 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:09:09,388 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:09:12,039 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:09:14,520 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:09:17,429 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:09:20,151 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:09:22,999 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:09:26,517 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:09:29,556 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:09:32,157 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:09:35,087 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:09:37,785 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:09:40,709 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:09:44,187 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:09:46,917 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:09:49,381 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:09:52,200 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:09:54,625 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:09:57,383 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:10:01,158 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:10:03,690 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:10:05,894 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:10:09,185 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:10:11,617 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:10:14,542 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:10:18,292 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:10:21,608 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:10:24,233 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:10:27,099 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:10:29,852 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:10:32,933 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:10:36,688 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:10:40,096 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:10:42,934 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:10:46,503 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:10:49,100 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:10:51,987 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:10:55,771 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:10:58,738 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:11:01,517 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:11:04,557 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:11:07,247 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:11:10,085 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:11:13,693 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 17:11:16,349 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 17:11:18,619 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:11:21,591 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:11:24,033 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 17:11:26,979 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 17:11:31,532 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 17:11:34,852 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 17:11:37,851 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 17:11:41,640 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 17:11:44,974 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 17:11:48,588 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 17:11:53,031 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 17:11:57,055 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 17:12:00,281 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 17:12:03,882 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:12:07,299 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 17:12:11,058 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 17:12:16,096 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 17:12:20,412 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 17:12:23,954 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 17:12:28,140 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 17:12:31,428 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 17:12:34,984 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 17:12:39,359 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 17:12:40,813 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 17:12:41,958 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 17:12:43,736 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 17:12:46,165 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-21 17:12:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:12:46,272 INFO L93 Difference]: Finished difference Result 426 states and 457 transitions. [2020-07-21 17:12:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2020-07-21 17:12:46,285 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 197 [2020-07-21 17:12:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:12:46,289 INFO L225 Difference]: With dead ends: 426 [2020-07-21 17:12:46,289 INFO L226 Difference]: Without dead ends: 390 [2020-07-21 17:12:46,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50369 ImplicationChecksByTransitivity, 553.1s TimeCoverageRelationStatistics Valid=40716, Invalid=158646, Unknown=0, NotChecked=0, Total=199362 [2020-07-21 17:12:46,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-07-21 17:12:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-07-21 17:12:46,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-07-21 17:12:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 390 transitions. [2020-07-21 17:12:46,381 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 390 transitions. Word has length 197 [2020-07-21 17:12:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:12:46,382 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 390 transitions. [2020-07-21 17:12:46,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 197 states. [2020-07-21 17:12:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 390 transitions. [2020-07-21 17:12:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-21 17:12:46,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:12:46,392 INFO L422 BasicCegarLoop]: trace histogram [126, 126, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:12:46,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:12:46,606 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:12:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:12:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -354150478, now seen corresponding path program 7 times [2020-07-21 17:12:46,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:12:46,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036392280] [2020-07-21 17:12:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:12:46,862 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:12:46,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:12:46,895 WARN L261 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 386 conjunts are in the unsatisfiable core [2020-07-21 17:12:46,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:15:00,647 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 17:15:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23751 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:15:03,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:15:06,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:15:13,380 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 17:15:15,291 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 21