/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-lit/jm2006.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:59:54,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:59:54,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:59:54,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:59:54,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:59:54,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:59:54,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:59:54,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:59:54,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:59:54,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:59:54,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:59:54,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:59:54,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:59:54,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:59:54,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:59:54,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:59:54,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:59:54,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:59:54,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:59:54,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:59:54,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:59:54,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:59:54,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:59:54,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:59:54,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:59:54,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:59:54,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:59:54,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:59:54,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:59:54,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:59:54,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:59:54,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:59:54,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:59:54,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:59:54,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:59:54,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:59:54,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:59:54,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:59:54,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:59:54,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:59:54,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:59:54,197 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 16:59:54,233 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:59:54,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:59:54,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:59:54,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:59:54,235 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:59:54,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:59:54,236 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:59:54,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:59:54,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:59:54,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:59:54,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:59:54,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:59:54,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:59:54,237 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:59:54,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:59:54,238 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:59:54,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:59:54,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:59:54,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:59:54,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:59:54,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:59:54,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:59:54,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:59:54,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:59:54,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:59:54,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:59:54,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:54,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:59:54,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:59:54,240 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 16:59:54,516 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:59:54,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:59:54,534 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:59:54,535 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:59:54,536 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:59:54,537 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-21 16:59:54,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72c24c5cd/c589fd9052204fb98dd7274bfae5056f/FLAGce773e4d3 [2020-07-21 16:59:55,052 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:59:55,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-21 16:59:55,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72c24c5cd/c589fd9052204fb98dd7274bfae5056f/FLAGce773e4d3 [2020-07-21 16:59:55,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72c24c5cd/c589fd9052204fb98dd7274bfae5056f [2020-07-21 16:59:55,099 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:59:55,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:59:55,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:59:55,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:59:55,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:59:55,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:55" (1/1) ... [2020-07-21 16:59:55,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6651e297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55, skipping insertion in model container [2020-07-21 16:59:55,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:55" (1/1) ... [2020-07-21 16:59:55,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:59:55,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:59:55,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:59:55,402 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:59:55,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:59:55,438 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:59:55,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55 WrapperNode [2020-07-21 16:59:55,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:59:55,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:59:55,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:59:55,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:59:55,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55" (1/1) ... [2020-07-21 16:59:55,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55" (1/1) ... [2020-07-21 16:59:55,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55" (1/1) ... [2020-07-21 16:59:55,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55" (1/1) ... [2020-07-21 16:59:55,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55" (1/1) ... [2020-07-21 16:59:55,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55" (1/1) ... [2020-07-21 16:59:55,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55" (1/1) ... [2020-07-21 16:59:55,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:59:55,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:59:55,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:59:55,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:59:55,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55" (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 16:59:55,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:59:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:59:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:59:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:59:55,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:59:55,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:59:55,638 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:59:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:59:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:59:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:59:55,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:59:55,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:59:55,839 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:59:55,840 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 16:59:55,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:55 BoogieIcfgContainer [2020-07-21 16:59:55,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:59:55,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:59:55,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:59:55,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:59:55,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:59:55" (1/3) ... [2020-07-21 16:59:55,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538ef72b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:55, skipping insertion in model container [2020-07-21 16:59:55,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:55" (2/3) ... [2020-07-21 16:59:55,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538ef72b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:55, skipping insertion in model container [2020-07-21 16:59:55,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:55" (3/3) ... [2020-07-21 16:59:55,852 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.c.i.v+cfa-reducer.c [2020-07-21 16:59:55,864 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:59:55,872 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:59:55,892 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:59:55,927 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:59:55,927 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:59:55,927 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:59:55,927 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:59:55,928 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:59:55,928 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:59:55,928 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:59:55,929 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:59:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 16:59:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 16:59:55,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:55,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:55,963 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1434042835, now seen corresponding path program 1 times [2020-07-21 16:59:55,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:55,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545302772] [2020-07-21 16:59:55,981 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 16:59:56,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:56,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:56,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 16:59:56,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:56,186 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:59:56,192 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:59:56,211 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 16:59:56,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:59:56,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545302772] [2020-07-21 16:59:56,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:59:56,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:59:56,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540804237] [2020-07-21 16:59:56,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:59:56,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:56,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:59:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:59:56,235 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-07-21 16:59:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:56,390 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 16:59:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:59:56,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-21 16:59:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:56,404 INFO L225 Difference]: With dead ends: 30 [2020-07-21 16:59:56,405 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 16:59:56,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:59:56,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 16:59:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 16:59:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 16:59:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 16:59:56,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-21 16:59:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:56,454 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 16:59:56,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:59:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 16:59:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:59:56,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:56,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:56,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:56,673 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1507594220, now seen corresponding path program 1 times [2020-07-21 16:59:56,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:56,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973264029] [2020-07-21 16:59:56,675 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 16:59:56,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:56,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:56,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 16:59:56,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:59:56,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:59:56,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:59:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:59:56,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973264029] [2020-07-21 16:59:56,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:59:56,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-21 16:59:56,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316882340] [2020-07-21 16:59:56,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 16:59:56,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:56,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 16:59:56,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:59:56,916 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2020-07-21 16:59:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:57,135 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-21 16:59:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:59:57,136 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-07-21 16:59:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:57,137 INFO L225 Difference]: With dead ends: 23 [2020-07-21 16:59:57,137 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 16:59:57,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:59:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 16:59:57,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 16:59:57,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 16:59:57,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 16:59:57,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-21 16:59:57,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:57,146 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 16:59:57,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 16:59:57,147 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 16:59:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 16:59:57,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:57,148 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:57,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:57,364 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2102853613, now seen corresponding path program 2 times [2020-07-21 16:59:57,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:57,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519969671] [2020-07-21 16:59:57,375 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 16:59:57,417 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:57,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:57,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 16:59:57,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:59:57,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:59:57,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:59:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:59:57,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519969671] [2020-07-21 16:59:57,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:59:57,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 16:59:57,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288192917] [2020-07-21 16:59:57,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 16:59:57,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:57,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 16:59:57,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:59:57,705 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 15 states. [2020-07-21 16:59:58,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:58,203 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 16:59:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 16:59:58,204 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2020-07-21 16:59:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:58,205 INFO L225 Difference]: With dead ends: 29 [2020-07-21 16:59:58,205 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 16:59:58,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:59:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 16:59:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 16:59:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 16:59:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-21 16:59:58,214 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-21 16:59:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:58,214 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-21 16:59:58,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 16:59:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-21 16:59:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 16:59:58,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:58,216 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:58,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:58,417 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:58,419 INFO L82 PathProgramCache]: Analyzing trace with hash 906772109, now seen corresponding path program 3 times [2020-07-21 16:59:58,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:58,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911312147] [2020-07-21 16:59:58,421 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 16:59:58,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:58,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 16:59:58,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:59:58,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:59:58,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:59:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:59:59,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911312147] [2020-07-21 16:59:59,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:59:59,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-07-21 16:59:59,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278396400] [2020-07-21 16:59:59,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:59:59,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:59,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:59:59,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:59:59,191 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 27 states. [2020-07-21 16:59:59,832 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-07-21 17:00:00,131 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-07-21 17:00:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:00:00,893 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 17:00:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 17:00:00,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 22 [2020-07-21 17:00:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:00:00,896 INFO L225 Difference]: With dead ends: 41 [2020-07-21 17:00:00,896 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 17:00:00,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=550, Invalid=1172, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 17:00:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 17:00:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 17:00:00,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 17:00:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-21 17:00:00,907 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-21 17:00:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:00:00,907 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-21 17:00:00,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 17:00:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-21 17:00:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 17:00:00,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:00:00,909 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:00:01,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:01,123 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:00:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:00:01,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1007922227, now seen corresponding path program 4 times [2020-07-21 17:00:01,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:00:01,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741317359] [2020-07-21 17:00:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:01,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:00:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:00:01,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-21 17:00:01,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:00:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:01,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:00:01,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:00:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:03,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741317359] [2020-07-21 17:00:03,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:00:03,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2020-07-21 17:00:03,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632994256] [2020-07-21 17:00:03,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-21 17:00:03,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:00:03,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-21 17:00:03,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2020-07-21 17:00:03,338 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 51 states. [2020-07-21 17:00:04,307 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 17:00:04,677 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 17:00:05,048 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-07-21 17:00:05,419 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 17:00:05,809 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 100 [2020-07-21 17:00:06,128 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 17:00:06,426 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 17:00:06,726 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 17:00:07,006 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 17:00:07,273 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 17:00:07,539 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 17:00:07,814 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 17:00:10,329 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 17:00:10,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:00:10,339 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-21 17:00:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-21 17:00:10,341 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 34 [2020-07-21 17:00:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:00:10,342 INFO L225 Difference]: With dead ends: 65 [2020-07-21 17:00:10,343 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 17:00:10,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1942, Invalid=4064, Unknown=0, NotChecked=0, Total=6006 [2020-07-21 17:00:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 17:00:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 17:00:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 17:00:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-21 17:00:10,362 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-21 17:00:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:00:10,362 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-21 17:00:10,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-21 17:00:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-21 17:00:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 17:00:10,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:00:10,364 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:00:10,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:10,578 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:00:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:00:10,579 INFO L82 PathProgramCache]: Analyzing trace with hash -765796787, now seen corresponding path program 5 times [2020-07-21 17:00:10,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:00:10,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532074055] [2020-07-21 17:00:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:10,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:00:10,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:00:10,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-21 17:00:10,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:00:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:13,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:00:13,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:00:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:18,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532074055] [2020-07-21 17:00:18,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:00:18,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 99 [2020-07-21 17:00:18,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404057044] [2020-07-21 17:00:18,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-21 17:00:18,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:00:18,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-21 17:00:18,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2407, Invalid=7295, Unknown=0, NotChecked=0, Total=9702 [2020-07-21 17:00:18,787 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 99 states. [2020-07-21 17:00:22,327 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-21 17:00:23,740 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 17:00:24,697 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 194 [2020-07-21 17:00:26,069 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 17:00:27,041 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 196 [2020-07-21 17:00:28,313 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-21 17:00:29,550 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-07-21 17:00:30,730 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-21 17:00:31,953 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-21 17:00:33,182 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-21 17:00:34,362 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-21 17:00:35,551 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-21 17:00:36,688 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-21 17:00:37,808 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 17:00:38,926 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-21 17:00:39,955 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 17:00:41,016 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 17:00:41,978 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-21 17:00:43,009 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 17:00:43,971 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-21 17:00:44,920 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 17:00:45,900 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 17:00:46,808 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 17:00:47,714 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 17:00:48,609 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 17:00:49,487 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-21 17:00:50,304 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 17:00:51,126 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 17:00:51,907 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 17:00:52,697 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 17:00:53,418 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 17:00:54,217 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 17:00:54,895 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 17:00:55,583 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 17:00:56,212 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 17:00:56,815 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 17:00:57,437 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 17:00:57,990 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 17:00:58,530 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 17:01:04,194 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 17:01:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:04,212 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2020-07-21 17:01:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-21 17:01:04,214 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 58 [2020-07-21 17:01:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:04,216 INFO L225 Difference]: With dead ends: 113 [2020-07-21 17:01:04,216 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 17:01:04,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=7318, Invalid=15032, Unknown=0, NotChecked=0, Total=22350 [2020-07-21 17:01:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 17:01:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-21 17:01:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 17:01:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-21 17:01:04,250 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-21 17:01:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:04,250 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-21 17:01:04,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-21 17:01:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-21 17:01:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 17:01:04,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:04,254 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:04,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:04,469 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:04,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1152480077, now seen corresponding path program 6 times [2020-07-21 17:01:04,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:04,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765835543] [2020-07-21 17:01:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:04,689 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:01:04,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 387 conjunts are in the unsatisfiable core [2020-07-21 17:01:04,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:15,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:01:16,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:01:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:51,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765835543] [2020-07-21 17:01:51,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:01:51,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 195 [2020-07-21 17:01:51,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2701984] [2020-07-21 17:01:51,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 195 states [2020-07-21 17:01:51,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:01:51,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2020-07-21 17:01:51,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9415, Invalid=28415, Unknown=0, NotChecked=0, Total=37830 [2020-07-21 17:01:51,902 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 195 states. [2020-07-21 17:02:20,305 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 482 [2020-07-21 17:02:34,069 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification that was a NOOP. DAG size: 477 [2020-07-21 17:02:38,609 WARN L193 SmtUtils]: Spent 3.81 s on a formula simplification. DAG size of input: 480 DAG size of output: 386 [2020-07-21 17:02:53,724 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 472 [2020-07-21 17:02:58,557 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 482 DAG size of output: 388 [2020-07-21 17:03:14,035 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification that was a NOOP. DAG size: 467 [2020-07-21 17:03:30,063 WARN L193 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 462 [2020-07-21 17:03:46,885 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-21 17:04:03,939 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification that was a NOOP. DAG size: 452 [2020-07-21 17:04:21,720 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification that was a NOOP. DAG size: 447 [2020-07-21 17:04:40,521 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification that was a NOOP. DAG size: 442 [2020-07-21 17:04:59,728 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-21 17:05:19,399 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 432 [2020-07-21 17:05:39,057 WARN L193 SmtUtils]: Spent 3.10 s on a formula simplification that was a NOOP. DAG size: 427 [2020-07-21 17:05:58,957 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 422 [2020-07-21 17:06:19,200 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification that was a NOOP. DAG size: 417 [2020-07-21 17:06:39,805 WARN L193 SmtUtils]: Spent 3.13 s on a formula simplification that was a NOOP. DAG size: 412 [2020-07-21 17:06:57,647 WARN L193 SmtUtils]: Spent 2.68 s on a formula simplification that was a NOOP. DAG size: 407 [2020-07-21 17:07:13,181 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-21 17:07:35,339 WARN L193 SmtUtils]: Spent 3.43 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-21 17:07:58,768 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-21 17:08:17,325 WARN L193 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 387 [2020-07-21 17:08:36,197 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-21 17:08:58,530 WARN L193 SmtUtils]: Spent 3.30 s on a formula simplification that was a NOOP. DAG size: 377 [2020-07-21 17:09:20,559 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-21 17:09:40,583 WARN L193 SmtUtils]: Spent 3.33 s on a formula simplification that was a NOOP. DAG size: 367 [2020-07-21 17:10:03,874 WARN L193 SmtUtils]: Spent 3.48 s on a formula simplification that was a NOOP. DAG size: 362 [2020-07-21 17:10:27,253 WARN L193 SmtUtils]: Spent 2.95 s on a formula simplification that was a NOOP. DAG size: 357 [2020-07-21 17:10:48,066 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-21 17:11:11,578 WARN L193 SmtUtils]: Spent 3.34 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-21 17:11:35,191 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 342 [2020-07-21 17:11:55,290 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification that was a NOOP. DAG size: 337 [2020-07-21 17:12:18,780 WARN L193 SmtUtils]: Spent 3.33 s on a formula simplification that was a NOOP. DAG size: 332 [2020-07-21 17:12:41,406 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 327 [2020-07-21 17:12:55,703 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 322 [2020-07-21 17:13:09,675 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 317 [2020-07-21 17:13:22,852 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 312 [2020-07-21 17:13:35,986 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 307 [2020-07-21 17:13:48,159 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 17:14:00,241 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 297 [2020-07-21 17:14:12,393 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 292