/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-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:56:36,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:56:36,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:56:36,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:56:36,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:56:36,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:56:36,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:56:36,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:56:36,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:56:36,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:56:36,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:56:36,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:56:36,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:56:36,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:56:36,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:56:36,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:56:36,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:56:36,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:56:36,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:56:36,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:56:36,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:56:36,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:56:36,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:56:36,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:56:36,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:56:36,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:56:36,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:56:36,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:56:36,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:56:36,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:56:36,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:56:36,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:56:36,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:56:36,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:56:36,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:56:36,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:56:36,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:56:36,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:56:36,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:56:36,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:56:36,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:56:36,108 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 16:56:36,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:56:36,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:56:36,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:56:36,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:56:36,150 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:56:36,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:56:36,150 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:56:36,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:56:36,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:56:36,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:56:36,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:56:36,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:56:36,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:56:36,153 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:56:36,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:56:36,153 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:56:36,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:56:36,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:56:36,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:56:36,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:56:36,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:56:36,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:56:36,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:56:36,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:56:36,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:56:36,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:56:36,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:36,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:56:36,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:56:36,157 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 16:56:36,443 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:56:36,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:56:36,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:56:36,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:56:36,470 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:56:36,471 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-21 16:56:36,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0883207dc/64233b10598143fa90aa0267697174d3/FLAGc439a9cb8 [2020-07-21 16:56:37,048 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:56:37,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-07-21 16:56:37,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0883207dc/64233b10598143fa90aa0267697174d3/FLAGc439a9cb8 [2020-07-21 16:56:37,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0883207dc/64233b10598143fa90aa0267697174d3 [2020-07-21 16:56:37,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:56:37,466 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:56:37,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:56:37,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:56:37,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:56:37,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:56:37" (1/1) ... [2020-07-21 16:56:37,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc8d877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37, skipping insertion in model container [2020-07-21 16:56:37,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:56:37" (1/1) ... [2020-07-21 16:56:37,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:56:37,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:56:37,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:56:37,718 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:56:37,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:56:37,748 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:56:37,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37 WrapperNode [2020-07-21 16:56:37,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:56:37,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:56:37,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:56:37,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:56:37,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37" (1/1) ... [2020-07-21 16:56:37,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37" (1/1) ... [2020-07-21 16:56:37,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37" (1/1) ... [2020-07-21 16:56:37,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37" (1/1) ... [2020-07-21 16:56:37,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37" (1/1) ... [2020-07-21 16:56:37,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37" (1/1) ... [2020-07-21 16:56:37,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37" (1/1) ... [2020-07-21 16:56:37,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:56:37,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:56:37,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:56:37,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:56:37,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37" (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 16:56:37,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:56:37,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:56:37,923 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:56:37,924 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:56:37,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:56:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:56:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:56:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:56:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:56:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:56:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:56:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:56:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:56:38,159 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:56:38,160 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:56:38,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:56:38 BoogieIcfgContainer [2020-07-21 16:56:38,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:56:38,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:56:38,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:56:38,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:56:38,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:56:37" (1/3) ... [2020-07-21 16:56:38,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5329afb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:56:38, skipping insertion in model container [2020-07-21 16:56:38,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:56:37" (2/3) ... [2020-07-21 16:56:38,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5329afb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:56:38, skipping insertion in model container [2020-07-21 16:56:38,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:56:38" (3/3) ... [2020-07-21 16:56:38,174 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-07-21 16:56:38,188 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:56:38,198 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:56:38,221 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:56:38,253 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:56:38,254 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:56:38,254 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:56:38,254 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:56:38,254 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:56:38,254 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:56:38,255 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:56:38,255 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:56:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-21 16:56:38,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:56:38,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:38,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:38,287 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:38,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:38,294 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-07-21 16:56:38,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:38,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545035857] [2020-07-21 16:56:38,305 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 16:56:38,382 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:38,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:38,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:56:38,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:38,415 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 16:56:38,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:38,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545035857] [2020-07-21 16:56:38,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:38,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:56:38,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882741635] [2020-07-21 16:56:38,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:56:38,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:38,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:56:38,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:56:38,436 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-21 16:56:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:38,463 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-07-21 16:56:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:56:38,464 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-21 16:56:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:38,473 INFO L225 Difference]: With dead ends: 61 [2020-07-21 16:56:38,473 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 16:56:38,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 16:56:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 16:56:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 16:56:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 16:56:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-07-21 16:56:38,525 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-07-21 16:56:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:38,525 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-07-21 16:56:38,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:56:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-07-21 16:56:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 16:56:38,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:38,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:38,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:38,729 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:38,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:38,730 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-07-21 16:56:38,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:38,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492321875] [2020-07-21 16:56:38,731 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 16:56:38,772 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:38,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:38,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:56:38,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:38,808 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:38,836 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 16:56:38,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:38,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492321875] [2020-07-21 16:56:38,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:38,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:56:38,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784044295] [2020-07-21 16:56:38,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:56:38,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:38,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:56:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:56:38,840 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-07-21 16:56:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:38,965 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-21 16:56:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:56:38,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 16:56:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:38,967 INFO L225 Difference]: With dead ends: 35 [2020-07-21 16:56:38,967 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 16:56:38,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:56:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 16:56:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 16:56:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 16:56:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-07-21 16:56:38,996 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-07-21 16:56:38,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:38,997 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-07-21 16:56:38,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:56:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-07-21 16:56:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 16:56:39,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:39,001 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:39,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:39,205 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-07-21 16:56:39,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:39,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520613807] [2020-07-21 16:56:39,209 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 16:56:39,257 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:39,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:39,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:56:39,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:39,306 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:39,310 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:56:39,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:39,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520613807] [2020-07-21 16:56:39,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:39,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:56:39,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552719098] [2020-07-21 16:56:39,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:56:39,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:39,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:56:39,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:56:39,344 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-07-21 16:56:39,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:39,503 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-07-21 16:56:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:56:39,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-21 16:56:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:39,506 INFO L225 Difference]: With dead ends: 48 [2020-07-21 16:56:39,507 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 16:56:39,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:56:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 16:56:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-21 16:56:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 16:56:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-07-21 16:56:39,519 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-07-21 16:56:39,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:39,520 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-07-21 16:56:39,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:56:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-07-21 16:56:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:56:39,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:39,522 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:39,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:39,736 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:39,738 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-07-21 16:56:39,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:39,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609628270] [2020-07-21 16:56:39,739 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 16:56:39,776 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:39,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:39,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:56:39,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:39,809 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 16:56:39,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:39,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609628270] [2020-07-21 16:56:39,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:39,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:56:39,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046867810] [2020-07-21 16:56:39,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:56:39,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:39,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:56:39,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:56:39,835 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-07-21 16:56:39,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:39,928 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-07-21 16:56:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:56:39,929 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-21 16:56:39,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:39,930 INFO L225 Difference]: With dead ends: 55 [2020-07-21 16:56:39,931 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 16:56:39,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:56:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 16:56:39,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-07-21 16:56:39,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 16:56:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-07-21 16:56:39,943 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-07-21 16:56:39,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:39,944 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-07-21 16:56:39,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:56:39,944 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-07-21 16:56:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 16:56:39,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:39,947 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:40,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:40,165 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-07-21 16:56:40,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:40,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942275926] [2020-07-21 16:56:40,167 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 16:56:40,216 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:40,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:40,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:56:40,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:40,270 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:40,277 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 16:56:40,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:40,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942275926] [2020-07-21 16:56:40,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:40,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 16:56:40,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743268189] [2020-07-21 16:56:40,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:56:40,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:40,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:56:40,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:56:40,308 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-07-21 16:56:40,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:40,505 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-21 16:56:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:56:40,505 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-21 16:56:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:40,508 INFO L225 Difference]: With dead ends: 70 [2020-07-21 16:56:40,508 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 16:56:40,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:56:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 16:56:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-21 16:56:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 16:56:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-21 16:56:40,539 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-07-21 16:56:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:40,540 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-21 16:56:40,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:56:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-21 16:56:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 16:56:40,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:40,544 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:40,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:40,760 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-07-21 16:56:40,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:40,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535403030] [2020-07-21 16:56:40,763 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 16:56:40,791 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:40,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:40,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:56:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:40,835 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:40,837 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 16:56:40,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:56:40,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535403030] [2020-07-21 16:56:40,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:56:40,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 16:56:40,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010002842] [2020-07-21 16:56:40,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:56:40,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:40,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:56:40,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:56:40,857 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-07-21 16:56:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:41,054 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-07-21 16:56:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:56:41,054 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-21 16:56:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:41,056 INFO L225 Difference]: With dead ends: 72 [2020-07-21 16:56:41,056 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 16:56:41,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:56:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 16:56:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-07-21 16:56:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 16:56:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-07-21 16:56:41,070 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-07-21 16:56:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:41,070 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-07-21 16:56:41,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:56:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-07-21 16:56:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 16:56:41,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:41,073 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:41,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:41,276 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:41,277 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-07-21 16:56:41,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:41,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719750841] [2020-07-21 16:56:41,279 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 16:56:41,316 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:41,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:41,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 16:56:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:41,440 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:56:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 16:56:41,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:56:41,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 16:56:41,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719750841] [2020-07-21 16:56:41,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:56:41,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-07-21 16:56:41,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053161650] [2020-07-21 16:56:41,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 16:56:41,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:41,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 16:56:41,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-07-21 16:56:41,604 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 13 states. [2020-07-21 16:56:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:42,134 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-07-21 16:56:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 16:56:42,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-07-21 16:56:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:42,137 INFO L225 Difference]: With dead ends: 110 [2020-07-21 16:56:42,139 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 16:56:42,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-07-21 16:56:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 16:56:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-07-21 16:56:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 16:56:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2020-07-21 16:56:42,161 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 56 [2020-07-21 16:56:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:42,162 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2020-07-21 16:56:42,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 16:56:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2020-07-21 16:56:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 16:56:42,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:42,163 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:42,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:42,377 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:42,378 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-07-21 16:56:42,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:42,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198429037] [2020-07-21 16:56:42,380 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 16:56:42,413 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:42,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:56:42,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:42,463 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:42,465 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 16:56:42,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:56:42,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 16:56:42,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198429037] [2020-07-21 16:56:42,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:56:42,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-21 16:56:42,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816195898] [2020-07-21 16:56:42,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 16:56:42,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:42,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 16:56:42,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:56:42,570 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 12 states. [2020-07-21 16:56:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:42,774 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2020-07-21 16:56:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:56:42,775 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-07-21 16:56:42,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:42,785 INFO L225 Difference]: With dead ends: 93 [2020-07-21 16:56:42,785 INFO L226 Difference]: Without dead ends: 91 [2020-07-21 16:56:42,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:56:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-21 16:56:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-07-21 16:56:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 16:56:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-07-21 16:56:42,810 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 58 [2020-07-21 16:56:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:42,811 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-07-21 16:56:42,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 16:56:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-07-21 16:56:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 16:56:42,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:42,813 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:43,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:43,027 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:43,028 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-07-21 16:56:43,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:43,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434556654] [2020-07-21 16:56:43,029 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 16:56:43,071 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:43,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:43,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:56:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:43,187 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:43,188 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-21 16:56:43,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:56:43,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-21 16:56:43,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434556654] [2020-07-21 16:56:43,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:56:43,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-21 16:56:43,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704329373] [2020-07-21 16:56:43,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 16:56:43,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:43,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 16:56:43,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:56:43,392 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 17 states. [2020-07-21 16:56:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:43,845 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2020-07-21 16:56:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 16:56:43,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-07-21 16:56:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:43,848 INFO L225 Difference]: With dead ends: 112 [2020-07-21 16:56:43,851 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 16:56:43,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2020-07-21 16:56:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 16:56:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-07-21 16:56:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 16:56:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-07-21 16:56:43,881 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 83 [2020-07-21 16:56:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:43,882 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-07-21 16:56:43,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 16:56:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-07-21 16:56:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 16:56:43,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:43,893 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:44,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:44,105 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:44,105 INFO L82 PathProgramCache]: Analyzing trace with hash 314554042, now seen corresponding path program 2 times [2020-07-21 16:56:44,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:44,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644125780] [2020-07-21 16:56:44,106 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 16:56:44,170 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:44,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:44,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:56:44,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:44,370 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:56:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-21 16:56:44,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:56:44,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:44,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:44,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:44,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:44,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:44,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:44,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:44,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:44,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:56:44,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:44,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:44,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:44,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:44,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:44,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:44,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:44,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:44,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-21 16:56:44,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644125780] [2020-07-21 16:56:44,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:56:44,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2020-07-21 16:56:44,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798671242] [2020-07-21 16:56:44,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 16:56:44,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:44,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 16:56:44,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:56:44,685 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 21 states. [2020-07-21 16:56:45,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:45,737 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2020-07-21 16:56:45,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 16:56:45,739 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-07-21 16:56:45,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:45,741 INFO L225 Difference]: With dead ends: 171 [2020-07-21 16:56:45,742 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 16:56:45,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 16:56:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 16:56:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2020-07-21 16:56:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-07-21 16:56:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2020-07-21 16:56:45,759 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 106 [2020-07-21 16:56:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:45,760 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2020-07-21 16:56:45,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 16:56:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2020-07-21 16:56:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 16:56:45,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:45,762 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:45,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:45,978 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:45,979 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-07-21 16:56:45,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:45,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302441627] [2020-07-21 16:56:45,980 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:46,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:46,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:46,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:56:46,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:46,182 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:46,183 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-21 16:56:46,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:56:46,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:46,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:46,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:46,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:46,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-21 16:56:46,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302441627] [2020-07-21 16:56:46,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:56:46,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2020-07-21 16:56:46,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972541593] [2020-07-21 16:56:46,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 16:56:46,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 16:56:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:56:46,498 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand 23 states. [2020-07-21 16:56:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:47,209 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2020-07-21 16:56:47,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 16:56:47,213 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-07-21 16:56:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:47,215 INFO L225 Difference]: With dead ends: 154 [2020-07-21 16:56:47,215 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 16:56:47,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 16:56:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 16:56:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-07-21 16:56:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 16:56:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2020-07-21 16:56:47,233 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 108 [2020-07-21 16:56:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:47,235 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2020-07-21 16:56:47,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 16:56:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2020-07-21 16:56:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-07-21 16:56:47,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:47,237 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:47,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:47,438 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash 335068695, now seen corresponding path program 4 times [2020-07-21 16:56:47,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:47,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717731109] [2020-07-21 16:56:47,440 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:47,496 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:47,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 16:56:47,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:47,819 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:47,820 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 46 proven. 135 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-21 16:56:47,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:56:47,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:48,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:48,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:48,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:48,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:48,290 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 16:56:48,295 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 16:56:48,367 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 16:56:48,369 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-21 16:56:48,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:48,375 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 16:56:48,376 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-21 16:56:48,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:48,419 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 16:56:48,420 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-21 16:56:48,421 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 16:56:48,426 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 16:56:48,427 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-21 16:56:48,428 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 16:56:48,512 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 16:56:48,513 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-21 16:56:48,514 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 16:56:48,520 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-21 16:56:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 46 proven. 135 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-07-21 16:56:48,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717731109] [2020-07-21 16:56:48,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:56:48,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2020-07-21 16:56:48,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558411874] [2020-07-21 16:56:48,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 16:56:48,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 16:56:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 16:56:48,662 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 35 states. [2020-07-21 16:56:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:51,080 INFO L93 Difference]: Finished difference Result 202 states and 257 transitions. [2020-07-21 16:56:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 16:56:51,081 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 158 [2020-07-21 16:56:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:51,084 INFO L225 Difference]: With dead ends: 202 [2020-07-21 16:56:51,084 INFO L226 Difference]: Without dead ends: 200 [2020-07-21 16:56:51,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=725, Invalid=3181, Unknown=0, NotChecked=0, Total=3906 [2020-07-21 16:56:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-21 16:56:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 168. [2020-07-21 16:56:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-21 16:56:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 204 transitions. [2020-07-21 16:56:51,113 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 204 transitions. Word has length 158 [2020-07-21 16:56:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:51,117 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 204 transitions. [2020-07-21 16:56:51,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 16:56:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 204 transitions. [2020-07-21 16:56:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-21 16:56:51,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:51,122 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:51,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:51,337 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:51,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:51,338 INFO L82 PathProgramCache]: Analyzing trace with hash 254282874, now seen corresponding path program 3 times [2020-07-21 16:56:51,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:51,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113035397] [2020-07-21 16:56:51,339 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:51,412 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:51,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:51,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:56:51,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:51,795 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:56:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 62 proven. 203 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-21 16:56:51,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:56:51,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:51,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:51,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:56:52,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:56:52,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:52,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 62 proven. 203 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-21 16:56:52,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113035397] [2020-07-21 16:56:52,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:56:52,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2020-07-21 16:56:52,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478801997] [2020-07-21 16:56:52,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 16:56:52,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:56:52,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 16:56:52,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=896, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 16:56:52,712 INFO L87 Difference]: Start difference. First operand 168 states and 204 transitions. Second operand 37 states. [2020-07-21 16:56:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:56:54,702 INFO L93 Difference]: Finished difference Result 275 states and 376 transitions. [2020-07-21 16:56:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-21 16:56:54,702 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 206 [2020-07-21 16:56:54,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:56:54,705 INFO L225 Difference]: With dead ends: 275 [2020-07-21 16:56:54,706 INFO L226 Difference]: Without dead ends: 239 [2020-07-21 16:56:54,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 373 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1051, Invalid=2371, Unknown=0, NotChecked=0, Total=3422 [2020-07-21 16:56:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-07-21 16:56:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 231. [2020-07-21 16:56:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-21 16:56:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 290 transitions. [2020-07-21 16:56:54,731 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 290 transitions. Word has length 206 [2020-07-21 16:56:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:56:54,732 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 290 transitions. [2020-07-21 16:56:54,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 16:56:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 290 transitions. [2020-07-21 16:56:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-07-21 16:56:54,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:56:54,736 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:56:54,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:54,951 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:56:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:56:54,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1789545513, now seen corresponding path program 5 times [2020-07-21 16:56:54,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:56:54,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275560737] [2020-07-21 16:56:54,953 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:56:55,032 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:56:55,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:56:55,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-21 16:56:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:56:57,704 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:57,705 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:56:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 78 proven. 405 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-21 16:56:57,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:56:58,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:58,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:58,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:58,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:58,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:56:58,404 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 16:56:58,404 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-21 16:56:58,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:58,410 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 16:56:58,543 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 16:56:58,544 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-21 16:56:58,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:58,551 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 16:56:58,552 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term [2020-07-21 16:56:58,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:56:58,624 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 16:56:58,625 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-21 16:56:58,625 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 16:56:58,631 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 16:56:58,632 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term [2020-07-21 16:56:58,632 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 16:56:58,767 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-21 16:56:58,779 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-21 16:56:58,848 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 5 conjuncts [2020-07-21 16:56:58,852 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 16:56:58,852 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-21 16:56:58,853 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-21 16:56:59,008 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 16:56:59,009 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-21 16:56:59,010 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-21 16:56:59,015 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 16:56:59,016 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term [2020-07-21 16:56:59,017 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts [2020-07-21 16:56:59,107 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-21 16:56:59,108 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[7, 6, 1] term [2020-07-21 16:56:59,108 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 6 conjuncts [2020-07-21 16:56:59,114 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-21 16:56:59,281 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-21 16:56:59,291 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts [2020-07-21 16:56:59,392 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-21 16:56:59,401 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-21 16:56:59,609 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts [2020-07-21 16:56:59,616 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts [2020-07-21 16:56:59,617 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[8, 7, 1] term [2020-07-21 16:56:59,618 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 7 conjuncts [2020-07-21 16:56:59,720 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-21 16:56:59,721 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-21 16:56:59,721 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-21 16:56:59,730 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-21 16:56:59,731 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-21 16:56:59,731 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-21 16:56:59,940 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-21 16:56:59,941 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-21 16:56:59,941 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-21 16:56:59,948 INFO L501 QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts [2020-07-21 16:56:59,949 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term [2020-07-21 16:56:59,949 INFO L501 QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts [2020-07-21 16:57:00,056 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-21 16:57:00,062 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-21 16:57:00,283 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-21 16:57:00,293 INFO L501 QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts [2020-07-21 16:57:00,433 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-21 16:57:00,441 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-21 16:57:00,677 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-21 16:57:00,684 INFO L501 QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts [2020-07-21 16:57:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 78 proven. 405 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-07-21 16:57:01,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275560737] [2020-07-21 16:57:01,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:57:01,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 67 [2020-07-21 16:57:01,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542010853] [2020-07-21 16:57:01,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-21 16:57:01,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:57:01,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-21 16:57:01,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=3521, Unknown=0, NotChecked=0, Total=4422 [2020-07-21 16:57:01,079 INFO L87 Difference]: Start difference. First operand 231 states and 290 transitions. Second operand 67 states. [2020-07-21 16:57:05,096 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-07-21 16:57:05,412 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 16:57:05,637 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 16:57:05,879 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 16:57:06,121 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 16:57:06,354 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:57:06,849 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:57:09,084 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 16:57:11,462 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 16:57:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:57:11,645 INFO L93 Difference]: Finished difference Result 302 states and 398 transitions. [2020-07-21 16:57:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-21 16:57:11,649 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 258 [2020-07-21 16:57:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:57:11,652 INFO L225 Difference]: With dead ends: 302 [2020-07-21 16:57:11,652 INFO L226 Difference]: Without dead ends: 300 [2020-07-21 16:57:11,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 447 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4142 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=3232, Invalid=12770, Unknown=0, NotChecked=0, Total=16002 [2020-07-21 16:57:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-07-21 16:57:11,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-07-21 16:57:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-21 16:57:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 347 transitions. [2020-07-21 16:57:11,684 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 347 transitions. Word has length 258 [2020-07-21 16:57:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:57:11,685 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 347 transitions. [2020-07-21 16:57:11,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-21 16:57:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 347 transitions. [2020-07-21 16:57:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-21 16:57:11,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:57:11,693 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 63, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:57:11,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:57:11,908 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:57:11,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:57:11,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1039722502, now seen corresponding path program 4 times [2020-07-21 16:57:11,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:57:11,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097826647] [2020-07-21 16:57:11,909 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:57:12,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:57:12,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:57:12,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-21 16:57:12,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:57:13,130 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:57:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8913 backedges. 126 proven. 975 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2020-07-21 16:57:13,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:57:13,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:13,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:13,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:13,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:13,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:13,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:14,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:14,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:14,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:14,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:14,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:14,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:14,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:14,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:15,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:15,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:15,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 16:57:15,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:57:15,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 16:57:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8913 backedges. 126 proven. 975 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2020-07-21 16:57:15,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097826647] [2020-07-21 16:57:15,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:57:15,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 69 [2020-07-21 16:57:15,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783994164] [2020-07-21 16:57:15,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-21 16:57:15,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:57:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-21 16:57:15,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1628, Invalid=3064, Unknown=0, NotChecked=0, Total=4692 [2020-07-21 16:57:15,973 INFO L87 Difference]: Start difference. First operand 270 states and 347 transitions. Second operand 69 states. [2020-07-21 16:57:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:57:20,698 INFO L93 Difference]: Finished difference Result 455 states and 649 transitions. [2020-07-21 16:57:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-21 16:57:20,699 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 406 [2020-07-21 16:57:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:57:20,704 INFO L225 Difference]: With dead ends: 455 [2020-07-21 16:57:20,704 INFO L226 Difference]: Without dead ends: 395 [2020-07-21 16:57:20,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 741 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3587, Invalid=7755, Unknown=0, NotChecked=0, Total=11342 [2020-07-21 16:57:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-07-21 16:57:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 387. [2020-07-21 16:57:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-07-21 16:57:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 507 transitions. [2020-07-21 16:57:20,744 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 507 transitions. Word has length 406 [2020-07-21 16:57:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:57:20,745 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 507 transitions. [2020-07-21 16:57:20,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-21 16:57:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 507 transitions. [2020-07-21 16:57:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 16:57:20,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:57:20,750 INFO L422 BasicCegarLoop]: trace histogram [80, 79, 79, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:57:20,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:57:20,964 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:57:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:57:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1959696841, now seen corresponding path program 6 times [2020-07-21 16:57:20,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:57:20,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764766547] [2020-07-21 16:57:20,966 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:57:21,105 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:57:21,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:57:21,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 88 conjunts are in the unsatisfiable core [2020-07-21 16:57:21,124 INFO L286 TraceCheckSpWp]: Computing forward predicates...