/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:42:20,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:42:20,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:42:20,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:42:20,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:42:20,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:42:20,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:42:20,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:42:20,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:42:20,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:42:20,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:42:20,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:42:20,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:42:20,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:42:20,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:42:20,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:42:20,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:42:20,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:42:20,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:42:20,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:42:20,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:42:20,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:42:20,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:42:20,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:42:20,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 22:42:20,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 22:42:20,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 22:42:20,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 22:42:20,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 22:42:20,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 22:42:20,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 22:42:20,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 22:42:20,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 22:42:20,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 22:42:20,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 22:42:20,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 22:42:20,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 22:42:20,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 22:42:20,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:42:20,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:42:20,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:42:20,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:42:20,752 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:42:20,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:42:20,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:42:20,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:42:20,754 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:42:20,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:42:20,755 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:42:20,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:42:20,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:42:20,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:42:20,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:42:20,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:42:20,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:42:20,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:42:20,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:42:20,757 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:42:20,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:42:20,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:42:20,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:42:20,759 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:42:20,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:42:20,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:42:20,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:42:20,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:42:20,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:42:20,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:42:20,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:20,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:42:20,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:42:20,762 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:42:21,112 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:42:21,128 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:42:21,133 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:42:21,135 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:42:21,135 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:42:21,136 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-07-20 22:42:21,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64227c8d2/7adb6ca9201c4357ba27ffaff0f0ce56/FLAG7e00af417 [2020-07-20 22:42:21,868 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:42:21,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-07-20 22:42:21,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64227c8d2/7adb6ca9201c4357ba27ffaff0f0ce56/FLAG7e00af417 [2020-07-20 22:42:22,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64227c8d2/7adb6ca9201c4357ba27ffaff0f0ce56 [2020-07-20 22:42:22,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:42:22,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:42:22,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:42:22,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:42:22,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:42:22,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:42:22" (1/1) ... [2020-07-20 22:42:22,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550e9810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22, skipping insertion in model container [2020-07-20 22:42:22,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:42:22" (1/1) ... [2020-07-20 22:42:22,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:42:22,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:42:22,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:42:22,617 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:42:22,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:42:22,863 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:42:22,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22 WrapperNode [2020-07-20 22:42:22,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:42:22,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:42:22,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:42:22,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:42:22,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22" (1/1) ... [2020-07-20 22:42:22,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22" (1/1) ... [2020-07-20 22:42:22,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22" (1/1) ... [2020-07-20 22:42:22,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22" (1/1) ... [2020-07-20 22:42:22,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22" (1/1) ... [2020-07-20 22:42:22,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22" (1/1) ... [2020-07-20 22:42:22,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22" (1/1) ... [2020-07-20 22:42:22,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:42:22,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:42:22,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:42:22,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:42:22,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:42:23,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:42:23,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:42:23,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:42:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:42:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-20 22:42:23,079 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 22:42:23,079 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:42:23,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:42:23,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:42:23,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:42:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 22:42:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 22:42:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:42:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:42:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:42:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 22:42:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:42:26,126 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:42:26,127 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 22:42:26,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:42:26 BoogieIcfgContainer [2020-07-20 22:42:26,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:42:26,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:42:26,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:42:26,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:42:26,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:42:22" (1/3) ... [2020-07-20 22:42:26,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf5da1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:42:26, skipping insertion in model container [2020-07-20 22:42:26,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:22" (2/3) ... [2020-07-20 22:42:26,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf5da1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:42:26, skipping insertion in model container [2020-07-20 22:42:26,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:42:26" (3/3) ... [2020-07-20 22:42:26,147 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-07-20 22:42:26,162 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:42:26,174 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:42:26,193 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:42:26,226 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:42:26,226 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:42:26,226 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:42:26,227 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:42:26,227 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:42:26,227 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:42:26,227 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:42:26,227 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:42:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 22:42:26,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 22:42:26,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:42:26,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:42:26,264 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:42:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:42:26,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1960518123, now seen corresponding path program 1 times [2020-07-20 22:42:26,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:42:26,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327502696] [2020-07-20 22:42:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:31,684 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:42:31,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:42:31,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:42:31,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:42:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:42:31,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:42:31,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327502696] [2020-07-20 22:42:31,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:42:31,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:42:31,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891337861] [2020-07-20 22:42:31,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:42:31,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:42:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:42:31,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:42:31,779 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2020-07-20 22:42:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:42:31,905 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-07-20 22:42:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:42:31,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-20 22:42:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:42:31,920 INFO L225 Difference]: With dead ends: 38 [2020-07-20 22:42:31,920 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 22:42:31,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:42:31,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 22:42:31,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-07-20 22:42:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 22:42:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-20 22:42:31,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-07-20 22:42:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:42:31,977 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-20 22:42:31,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:42:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-20 22:42:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 22:42:31,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:42:31,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:42:32,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:32,180 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:42:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:42:32,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1182240945, now seen corresponding path program 1 times [2020-07-20 22:42:32,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:42:32,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806046412] [2020-07-20 22:42:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:38,425 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:42:38,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:42:38,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:42:38,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:42:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:42:38,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:42:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:42:38,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806046412] [2020-07-20 22:42:38,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:42:38,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 22:42:38,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922896443] [2020-07-20 22:42:38,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:42:38,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:42:38,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:42:38,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:42:38,587 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2020-07-20 22:42:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:42:43,055 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-07-20 22:42:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:42:43,056 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-20 22:42:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:42:43,058 INFO L225 Difference]: With dead ends: 38 [2020-07-20 22:42:43,058 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 22:42:43,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-20 22:42:43,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 22:42:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-20 22:42:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 22:42:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-07-20 22:42:43,070 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 17 [2020-07-20 22:42:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:42:43,070 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-07-20 22:42:43,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:42:43,071 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-07-20 22:42:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 22:42:43,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:42:43,072 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:42:43,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:43,275 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:42:43,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:42:43,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1890060651, now seen corresponding path program 2 times [2020-07-20 22:42:43,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:42:43,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580750341] [2020-07-20 22:42:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:43:08,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:43:08,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:43:09,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:43:09,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:43:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:43:09,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:43:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:43:09,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580750341] [2020-07-20 22:43:09,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:43:09,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 22:43:09,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982306038] [2020-07-20 22:43:09,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 22:43:09,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:43:09,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 22:43:09,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-07-20 22:43:09,392 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-07-20 22:43:19,967 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-07-20 22:43:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:43:30,978 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-07-20 22:43:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 22:43:30,980 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-07-20 22:43:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:43:30,982 INFO L225 Difference]: With dead ends: 68 [2020-07-20 22:43:30,982 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 22:43:30,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=191, Invalid=457, Unknown=2, NotChecked=0, Total=650 [2020-07-20 22:43:30,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 22:43:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-07-20 22:43:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 22:43:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-07-20 22:43:30,998 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 32 [2020-07-20 22:43:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:43:30,999 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-07-20 22:43:30,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 22:43:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-07-20 22:43:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 22:43:31,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:43:31,002 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:43:31,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:43:31,208 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:43:31,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:43:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1772338347, now seen corresponding path program 3 times [2020-07-20 22:43:31,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:43:31,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756145276] [2020-07-20 22:43:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:45:05,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:45:05,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:45:10,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 22:45:10,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:45:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:45:10,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:45:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:45:13,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756145276] [2020-07-20 22:45:13,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:45:13,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 22:45:13,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601792586] [2020-07-20 22:45:13,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 22:45:13,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:45:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 22:45:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=478, Unknown=1, NotChecked=0, Total=650 [2020-07-20 22:45:13,327 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 26 states. [2020-07-20 22:45:34,948 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-20 22:45:37,445 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-20 22:45:37,925 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-20 22:45:42,692 WARN L193 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 50 DAG size of output: 20 [2020-07-20 22:45:49,327 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-20 22:45:56,139 WARN L193 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 40 DAG size of output: 20 [2020-07-20 22:46:00,665 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2020-07-20 22:46:15,952 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2020-07-20 22:46:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:46:28,136 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2020-07-20 22:46:28,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 22:46:28,138 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-07-20 22:46:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:46:28,141 INFO L225 Difference]: With dead ends: 128 [2020-07-20 22:46:28,142 INFO L226 Difference]: Without dead ends: 125 [2020-07-20 22:46:28,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=659, Invalid=1782, Unknown=9, NotChecked=0, Total=2450 [2020-07-20 22:46:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-20 22:46:28,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2020-07-20 22:46:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-20 22:46:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-07-20 22:46:28,164 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 62 [2020-07-20 22:46:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:46:28,165 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-07-20 22:46:28,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 22:46:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-07-20 22:46:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 22:46:28,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:46:28,170 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:46:28,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:46:28,372 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:46:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:46:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash -357330133, now seen corresponding path program 4 times [2020-07-20 22:46:28,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:46:28,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676649313] [2020-07-20 22:46:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:50:21,633 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:50:21,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:50:30,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-20 22:50:30,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:50:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:50:30,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:50:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1196 refuted. 25 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:50:56,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676649313] [2020-07-20 22:50:56,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:50:56,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-20 22:50:56,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147555411] [2020-07-20 22:50:56,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 22:50:56,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:50:56,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 22:50:56,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1817, Unknown=12, NotChecked=0, Total=2450 [2020-07-20 22:50:56,942 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 50 states. [2020-07-20 22:51:12,998 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 14 [2020-07-20 22:51:22,129 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 100 DAG size of output: 15 [2020-07-20 22:51:27,593 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 95 DAG size of output: 15 [2020-07-20 22:51:33,169 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 15 [2020-07-20 22:51:39,962 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 85 DAG size of output: 15 [2020-07-20 22:51:45,639 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 15 [2020-07-20 22:51:56,133 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2020-07-20 22:52:08,145 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 70 DAG size of output: 15 [2020-07-20 22:52:15,633 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 15 [2020-07-20 22:52:22,373 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-20 22:52:24,783 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-20 22:52:33,309 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-20 22:52:40,496 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-20 22:52:46,619 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 22:52:58,821 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2020-07-20 22:53:06,645 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2020-07-20 22:53:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:53:35,105 INFO L93 Difference]: Finished difference Result 228 states and 247 transitions. [2020-07-20 22:53:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-20 22:53:35,106 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2020-07-20 22:53:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:53:35,109 INFO L225 Difference]: With dead ends: 228 [2020-07-20 22:53:35,109 INFO L226 Difference]: Without dead ends: 225 [2020-07-20 22:53:35,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 168.2s TimeCoverageRelationStatistics Valid=2173, Invalid=6539, Unknown=30, NotChecked=0, Total=8742 [2020-07-20 22:53:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-20 22:53:35,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-07-20 22:53:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-20 22:53:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2020-07-20 22:53:35,135 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 122 [2020-07-20 22:53:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:53:35,135 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2020-07-20 22:53:35,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 22:53:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2020-07-20 22:53:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-07-20 22:53:35,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:53:35,140 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:53:35,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:53:35,349 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:53:35,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:53:35,350 INFO L82 PathProgramCache]: Analyzing trace with hash -576259925, now seen corresponding path program 5 times [2020-07-20 22:53:35,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:53:35,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801197482] [2020-07-20 22:53:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in