/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:17:41,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:17:41,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:17:41,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:17:41,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:17:41,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:17:41,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:17:41,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:17:41,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:17:41,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:17:41,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:17:41,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:17:41,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:17:41,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:17:41,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:17:41,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:17:41,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:17:41,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:17:41,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:17:41,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:17:41,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:17:41,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:17:41,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:17:41,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:17:41,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:17:41,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:17:41,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:17:41,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:17:41,818 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 14:17:41,858 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:17:41,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:17:41,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:17:41,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:17:41,862 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:17:41,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:17:41,863 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:17:41,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:17:41,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:17:41,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:17:41,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:17:41,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:17:41,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:17:41,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:17:41,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:17:41,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:17:41,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:17:41,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:17:41,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:17:41,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:17:41,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:17:41,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:17:41,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:17:41,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:17:41,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:17:41,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:17:41,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:41,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:17:41,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:17:41,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:17:42,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:17:42,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:17:42,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:17:42,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:17:42,247 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:17:42,248 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-07-21 14:17:42,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70967a8f8/1a3b37ca7fdb4a808f75c8afc4ff27df/FLAG30ae6518e [2020-07-21 14:17:42,932 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:17:42,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-07-21 14:17:42,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70967a8f8/1a3b37ca7fdb4a808f75c8afc4ff27df/FLAG30ae6518e [2020-07-21 14:17:43,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70967a8f8/1a3b37ca7fdb4a808f75c8afc4ff27df [2020-07-21 14:17:43,158 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:17:43,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:17:43,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:17:43,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:17:43,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:17:43,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:17:43" (1/1) ... [2020-07-21 14:17:43,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c5f245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43, skipping insertion in model container [2020-07-21 14:17:43,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:17:43" (1/1) ... [2020-07-21 14:17:43,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:17:43,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:17:43,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:17:43,610 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:17:43,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:17:43,707 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:17:43,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43 WrapperNode [2020-07-21 14:17:43,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:17:43,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:17:43,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:17:43,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:17:43,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43" (1/1) ... [2020-07-21 14:17:43,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43" (1/1) ... [2020-07-21 14:17:43,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43" (1/1) ... [2020-07-21 14:17:43,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43" (1/1) ... [2020-07-21 14:17:43,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43" (1/1) ... [2020-07-21 14:17:43,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43" (1/1) ... [2020-07-21 14:17:43,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43" (1/1) ... [2020-07-21 14:17:43,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:17:43,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:17:43,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:17:43,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:17:43,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43" (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 14:17:43,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:17:43,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:17:43,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:17:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:17:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-21 14:17:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-21 14:17:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:17:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:17:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 14:17:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 14:17:43,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 14:17:43,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 14:17:43,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 14:17:43,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:17:43,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:17:43,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 14:17:43,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 14:17:46,874 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:17:46,875 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:17:46,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:17:46 BoogieIcfgContainer [2020-07-21 14:17:46,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:17:46,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:17:46,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:17:46,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:17:46,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:17:43" (1/3) ... [2020-07-21 14:17:46,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567f682f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:17:46, skipping insertion in model container [2020-07-21 14:17:46,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:17:43" (2/3) ... [2020-07-21 14:17:46,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567f682f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:17:46, skipping insertion in model container [2020-07-21 14:17:46,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:17:46" (3/3) ... [2020-07-21 14:17:46,901 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-07-21 14:17:46,915 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:17:46,928 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:17:46,950 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:17:46,987 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:17:46,988 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:17:46,988 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:17:46,988 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:17:46,988 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:17:46,989 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:17:46,989 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:17:46,989 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:17:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 14:17:47,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 14:17:47,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:47,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:47,033 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:47,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash 316900320, now seen corresponding path program 1 times [2020-07-21 14:17:47,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:47,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739484286] [2020-07-21 14:17:47,050 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 14:17:50,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:50,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:17:50,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:50,242 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 14:17:50,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:17:50,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739484286] [2020-07-21 14:17:50,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:17:50,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:17:50,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241202156] [2020-07-21 14:17:50,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:17:50,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:50,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:17:50,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:17:50,276 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2020-07-21 14:17:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:50,392 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-07-21 14:17:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:17:50,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-21 14:17:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:50,413 INFO L225 Difference]: With dead ends: 46 [2020-07-21 14:17:50,414 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 14:17:50,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:17:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 14:17:50,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-07-21 14:17:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 14:17:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 14:17:50,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 14:17:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:50,476 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 14:17:50,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:17:50,476 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 14:17:50,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 14:17:50,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:50,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:50,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:50,678 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:50,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:50,679 INFO L82 PathProgramCache]: Analyzing trace with hash 316483246, now seen corresponding path program 1 times [2020-07-21 14:17:50,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:50,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418794971] [2020-07-21 14:17:50,680 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 14:17:53,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:17:53,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:17:53,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:17:53,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:17:53,939 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 14:17:53,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:17:53,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418794971] [2020-07-21 14:17:53,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:17:53,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:17:53,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634361493] [2020-07-21 14:17:53,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:17:53,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:17:53,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:17:53,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:17:53,945 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-07-21 14:17:54,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:17:54,005 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-07-21 14:17:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:17:54,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-21 14:17:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:17:54,009 INFO L225 Difference]: With dead ends: 28 [2020-07-21 14:17:54,009 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 14:17:54,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:17:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 14:17:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-07-21 14:17:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 14:17:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 14:17:54,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-07-21 14:17:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:17:54,034 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 14:17:54,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:17:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 14:17:54,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 14:17:54,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:17:54,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:17:54,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:17:54,238 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:17:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:17:54,239 INFO L82 PathProgramCache]: Analyzing trace with hash 625969832, now seen corresponding path program 1 times [2020-07-21 14:17:54,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:17:54,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772291018] [2020-07-21 14:17:54,243 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 14:18:03,393 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:18:03,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:18:03,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:18:03,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:18:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:18:03,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:18:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:18:03,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772291018] [2020-07-21 14:18:03,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:18:03,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 14:18:03,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646274913] [2020-07-21 14:18:03,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:18:03,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:18:03,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:18:03,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:18:03,541 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-07-21 14:18:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:18:07,952 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-07-21 14:18:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 14:18:07,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-21 14:18:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:18:07,955 INFO L225 Difference]: With dead ends: 53 [2020-07-21 14:18:07,955 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 14:18:07,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-21 14:18:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 14:18:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-07-21 14:18:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 14:18:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-07-21 14:18:07,966 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 19 [2020-07-21 14:18:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:18:07,966 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-07-21 14:18:07,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:18:07,967 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-07-21 14:18:07,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 14:18:07,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:18:07,968 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:18:08,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:18:08,183 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:18:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:18:08,184 INFO L82 PathProgramCache]: Analyzing trace with hash 599808768, now seen corresponding path program 2 times [2020-07-21 14:18:08,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:18:08,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240744784] [2020-07-21 14:18:08,185 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 14:18:25,649 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:18:25,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:18:26,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 14:18:26,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:18:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:18:26,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:18:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 42 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:18:28,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240744784] [2020-07-21 14:18:28,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:18:28,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 14:18:28,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992737902] [2020-07-21 14:18:28,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 14:18:28,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:18:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 14:18:28,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=130, Unknown=1, NotChecked=0, Total=182 [2020-07-21 14:18:28,462 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-07-21 14:18:33,167 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-07-21 14:18:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:18:37,998 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-07-21 14:18:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 14:18:37,999 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-07-21 14:18:38,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:18:38,004 INFO L225 Difference]: With dead ends: 89 [2020-07-21 14:18:38,004 INFO L226 Difference]: Without dead ends: 79 [2020-07-21 14:18:38,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=191, Invalid=457, Unknown=2, NotChecked=0, Total=650 [2020-07-21 14:18:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-21 14:18:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2020-07-21 14:18:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 14:18:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-07-21 14:18:38,039 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 37 [2020-07-21 14:18:38,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:18:38,040 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-07-21 14:18:38,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 14:18:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-07-21 14:18:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 14:18:38,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:18:38,047 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:18:38,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:18:38,267 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:18:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:18:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash 740837808, now seen corresponding path program 3 times [2020-07-21 14:18:38,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:18:38,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577372670] [2020-07-21 14:18:38,269 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 14:19:23,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:19:23,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:19:25,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 14:19:25,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:19:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:19:25,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:19:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 276 refuted. 24 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:19:38,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577372670] [2020-07-21 14:19:38,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:19:38,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 14:19:38,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230418319] [2020-07-21 14:19:38,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 14:19:38,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:19:38,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 14:19:38,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=473, Unknown=6, NotChecked=0, Total=650 [2020-07-21 14:19:38,596 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 26 states. [2020-07-21 14:20:02,232 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-21 14:20:02,710 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-21 14:20:03,328 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-21 14:20:06,258 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-21 14:20:09,334 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-21 14:20:22,667 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-07-21 14:20:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:20:29,211 INFO L93 Difference]: Finished difference Result 161 states and 175 transitions. [2020-07-21 14:20:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 14:20:29,218 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-07-21 14:20:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:20:29,222 INFO L225 Difference]: With dead ends: 161 [2020-07-21 14:20:29,222 INFO L226 Difference]: Without dead ends: 151 [2020-07-21 14:20:29,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=663, Invalid=1777, Unknown=10, NotChecked=0, Total=2450 [2020-07-21 14:20:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-21 14:20:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2020-07-21 14:20:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-21 14:20:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2020-07-21 14:20:29,247 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 73 [2020-07-21 14:20:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:20:29,248 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2020-07-21 14:20:29,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 14:20:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2020-07-21 14:20:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-21 14:20:29,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:20:29,252 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:20:29,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:20:29,453 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:20:29,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:20:29,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1184145648, now seen corresponding path program 4 times [2020-07-21 14:20:29,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:20:29,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385973562] [2020-07-21 14:20:29,456 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 14:24:43,245 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:24:43,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:24:57,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-21 14:24:57,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:24:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 44 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:24:57,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:25:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 44 proven. 1416 refuted. 36 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:25:25,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385973562] [2020-07-21 14:25:25,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:25:25,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 14:25:25,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224760201] [2020-07-21 14:25:25,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 14:25:25,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:25:25,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 14:25:25,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1817, Unknown=12, NotChecked=0, Total=2450 [2020-07-21 14:25:25,223 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 50 states. [2020-07-21 14:26:02,431 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 99 DAG size of output: 14 [2020-07-21 14:26:08,997 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 100 DAG size of output: 15 [2020-07-21 14:26:23,011 WARN L193 SmtUtils]: Spent 5.49 s on a formula simplification. DAG size of input: 95 DAG size of output: 15 [2020-07-21 14:26:31,611 WARN L193 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 90 DAG size of output: 15 [2020-07-21 14:26:35,545 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 85 DAG size of output: 15 [2020-07-21 14:26:41,556 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 15 [2020-07-21 14:26:50,213 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2020-07-21 14:27:02,391 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 15 [2020-07-21 14:27:07,859 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 15 [2020-07-21 14:27:12,096 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-21 14:27:21,864 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-21 14:27:27,360 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-21 14:27:42,046 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-21 14:27:50,053 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-21 14:27:58,340 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2020-07-21 14:28:07,966 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2020-07-21 14:28:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:28:25,011 INFO L93 Difference]: Finished difference Result 281 states and 303 transitions. [2020-07-21 14:28:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-21 14:28:25,014 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2020-07-21 14:28:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:28:25,018 INFO L225 Difference]: With dead ends: 281 [2020-07-21 14:28:25,019 INFO L226 Difference]: Without dead ends: 271 [2020-07-21 14:28:25,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 169.7s TimeCoverageRelationStatistics Valid=2178, Invalid=6541, Unknown=23, NotChecked=0, Total=8742 [2020-07-21 14:28:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-21 14:28:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 266. [2020-07-21 14:28:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-07-21 14:28:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2020-07-21 14:28:25,066 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 145 [2020-07-21 14:28:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:28:25,068 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2020-07-21 14:28:25,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 14:28:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2020-07-21 14:28:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-07-21 14:28:25,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:28:25,076 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:28:25,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:28:25,295 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:28:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:28:25,296 INFO L82 PathProgramCache]: Analyzing trace with hash 713884336, now seen corresponding path program 5 times [2020-07-21 14:28:25,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:28:25,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480972060] [2020-07-21 14:28:25,297 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