/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:23:17,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:23:17,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:23:17,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:23:17,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:23:17,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:23:17,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:23:17,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:23:17,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:23:17,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:23:17,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:23:17,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:23:17,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:23:17,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:23:17,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:23:17,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:23:17,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:23:17,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:23:17,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:23:17,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:23:17,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:23:17,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:23:17,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:23:17,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:23:17,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:23:17,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:23:17,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:23:17,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:23:17,969 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 14:23:18,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:23:18,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:23:18,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:23:18,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:23:18,008 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:23:18,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:23:18,009 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:23:18,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:23:18,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:23:18,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:23:18,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:23:18,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:23:18,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:23:18,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:23:18,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:23:18,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:23:18,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:23:18,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:23:18,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:23:18,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:23:18,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:23:18,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:23:18,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:23:18,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:23:18,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:23:18,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:23:18,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:23:18,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:23:18,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:23:18,014 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 -> 4 [2020-07-20 14:23:18,293 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:23:18,305 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:23:18,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:23:18,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:23:18,311 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:23:18,312 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-07-20 14:23:18,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a8ca1af/8084805fc09e4b3e8c2a9f68c0e8f7c9/FLAGf03e23d57 [2020-07-20 14:23:18,856 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:23:18,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-07-20 14:23:18,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a8ca1af/8084805fc09e4b3e8c2a9f68c0e8f7c9/FLAGf03e23d57 [2020-07-20 14:23:19,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a8ca1af/8084805fc09e4b3e8c2a9f68c0e8f7c9 [2020-07-20 14:23:19,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:23:19,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:23:19,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:23:19,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:23:19,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:23:19,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:23:19" (1/1) ... [2020-07-20 14:23:19,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e11f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19, skipping insertion in model container [2020-07-20 14:23:19,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:23:19" (1/1) ... [2020-07-20 14:23:19,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:23:19,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:23:19,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:23:19,434 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:23:19,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:23:19,478 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:23:19,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19 WrapperNode [2020-07-20 14:23:19,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:23:19,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:23:19,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:23:19,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:23:19,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19" (1/1) ... [2020-07-20 14:23:19,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19" (1/1) ... [2020-07-20 14:23:19,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19" (1/1) ... [2020-07-20 14:23:19,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19" (1/1) ... [2020-07-20 14:23:19,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19" (1/1) ... [2020-07-20 14:23:19,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19" (1/1) ... [2020-07-20 14:23:19,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19" (1/1) ... [2020-07-20 14:23:19,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:23:19,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:23:19,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:23:19,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:23:19,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19" (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 14:23:19,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:23:19,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:23:19,662 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:23:19,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:23:19,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:23:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:23:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:23:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:23:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:23:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 14:23:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:23:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 14:23:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:23:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:23:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:23:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:23:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:23:19,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:23:19,931 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 14:23:19,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:23:19 BoogieIcfgContainer [2020-07-20 14:23:19,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:23:19,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:23:19,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:23:19,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:23:19,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:23:19" (1/3) ... [2020-07-20 14:23:19,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6bb227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:23:19, skipping insertion in model container [2020-07-20 14:23:19,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:23:19" (2/3) ... [2020-07-20 14:23:19,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6bb227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:23:19, skipping insertion in model container [2020-07-20 14:23:19,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:23:19" (3/3) ... [2020-07-20 14:23:19,942 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i [2020-07-20 14:23:19,953 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:23:19,960 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:23:19,975 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:23:19,999 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:23:20,000 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:23:20,000 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:23:20,000 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:23:20,000 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:23:20,000 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:23:20,001 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:23:20,001 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:23:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 14:23:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 14:23:20,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:23:20,035 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:23:20,035 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:23:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:23:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1561713717, now seen corresponding path program 1 times [2020-07-20 14:23:20,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:23:20,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743784732] [2020-07-20 14:23:20,048 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 14:23:20,151 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:23:20,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:23:20,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 14:23:20,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:23:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 14:23:20,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:23:20,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743784732] [2020-07-20 14:23:20,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:23:20,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 14:23:20,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015029404] [2020-07-20 14:23:20,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 14:23:20,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:23:20,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 14:23:20,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:23:20,201 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-07-20 14:23:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:23:20,224 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2020-07-20 14:23:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 14:23:20,226 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 14:23:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:23:20,235 INFO L225 Difference]: With dead ends: 59 [2020-07-20 14:23:20,235 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 14:23:20,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:23:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 14:23:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 14:23:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 14:23:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 14:23:20,278 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 22 [2020-07-20 14:23:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:23:20,278 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 14:23:20,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 14:23:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 14:23:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 14:23:20,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:23:20,281 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:23:20,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:23:20,495 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:23:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:23:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash -258750159, now seen corresponding path program 1 times [2020-07-20 14:23:20,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:23:20,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355070508] [2020-07-20 14:23:20,498 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 14:23:20,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:23:20,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:23:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 14:23:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:23:20,662 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:23:20,666 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:23:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 14:23:20,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:23:20,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355070508] [2020-07-20 14:23:20,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:23:20,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 14:23:20,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2371161] [2020-07-20 14:23:20,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 14:23:20,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:23:20,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 14:23:20,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:23:20,725 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-07-20 14:23:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:23:20,894 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-07-20 14:23:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 14:23:20,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 14:23:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:23:20,897 INFO L225 Difference]: With dead ends: 43 [2020-07-20 14:23:20,897 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 14:23:20,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 14:23:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 14:23:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-07-20 14:23:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 14:23:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-20 14:23:20,911 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 22 [2020-07-20 14:23:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:23:20,911 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-20 14:23:20,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 14:23:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-20 14:23:20,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 14:23:20,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:23:20,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:23:21,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:23:21,129 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:23:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:23:21,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1843057556, now seen corresponding path program 1 times [2020-07-20 14:23:21,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:23:21,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690971564] [2020-07-20 14:23:21,131 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 14:23:21,189 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:23:21,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:23:21,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:23:21,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:23:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 14:23:21,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:23:21,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690971564] [2020-07-20 14:23:21,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:23:21,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:23:21,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998254025] [2020-07-20 14:23:21,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:23:21,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:23:21,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:23:21,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:23:21,211 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 3 states. [2020-07-20 14:23:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:23:21,223 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-07-20 14:23:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:23:21,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 14:23:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:23:21,225 INFO L225 Difference]: With dead ends: 47 [2020-07-20 14:23:21,225 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 14:23:21,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:23:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 14:23:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-07-20 14:23:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 14:23:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-20 14:23:21,234 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2020-07-20 14:23:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:23:21,234 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-20 14:23:21,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:23:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-20 14:23:21,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 14:23:21,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:23:21,236 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:23:21,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:23:21,448 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:23:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:23:21,449 INFO L82 PathProgramCache]: Analyzing trace with hash -828791972, now seen corresponding path program 1 times [2020-07-20 14:23:21,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:23:21,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524889937] [2020-07-20 14:23:21,451 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 14:23:21,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:23:21,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:23:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 14:23:21,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:23:21,750 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:23:21,751 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:23:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 14:23:21,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:23:21,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:23:21,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:23:21,985 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 14:23:21,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:23:21,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:23:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 14:23:22,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524889937] [2020-07-20 14:23:22,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:23:22,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2020-07-20 14:23:22,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306208896] [2020-07-20 14:23:22,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 14:23:22,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:23:22,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 14:23:22,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-07-20 14:23:22,048 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 14 states. [2020-07-20 14:23:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:23:28,675 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-20 14:23:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 14:23:28,676 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-07-20 14:23:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:23:28,677 INFO L225 Difference]: With dead ends: 52 [2020-07-20 14:23:28,677 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 14:23:28,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-07-20 14:23:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 14:23:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2020-07-20 14:23:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 14:23:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 14:23:28,686 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 35 [2020-07-20 14:23:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:23:28,687 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 14:23:28,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 14:23:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 14:23:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 14:23:28,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:23:28,688 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:23:28,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:23:28,890 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:23:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:23:28,891 INFO L82 PathProgramCache]: Analyzing trace with hash -506278145, now seen corresponding path program 1 times [2020-07-20 14:23:28,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:23:28,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013813492] [2020-07-20 14:23:28,893 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