/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/loops-crafted-1/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:50:12,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:50:12,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:50:12,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:50:12,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:50:12,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:50:12,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:50:12,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:50:12,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:50:12,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:50:12,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:50:12,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:50:12,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:50:12,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:50:12,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:50:12,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:50:12,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:50:12,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:50:12,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:50:12,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:50:12,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:50:12,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:50:12,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:50:12,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:50:12,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:50:13,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:50:13,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:50:13,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:50:13,016 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 14:50:13,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:50:13,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:50:13,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:50:13,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:50:13,046 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:50:13,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:50:13,046 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:50:13,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:50:13,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:50:13,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:50:13,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:50:13,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:50:13,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:50:13,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:50:13,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:50:13,050 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:50:13,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:50:13,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:50:13,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:50:13,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:50:13,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:50:13,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:50:13,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:50:13,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:50:13,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:50:13,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:50:13,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:50:13,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:50:13,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:50:13,052 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 14:50:13,419 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:50:13,433 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:50:13,437 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:50:13,439 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:50:13,439 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:50:13,440 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-07-20 14:50:13,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf3946f6/2ce69b0a961f4d5b9fc976768609ab19/FLAG4fd3b37db [2020-07-20 14:50:14,005 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:50:14,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-07-20 14:50:14,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf3946f6/2ce69b0a961f4d5b9fc976768609ab19/FLAG4fd3b37db [2020-07-20 14:50:14,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf3946f6/2ce69b0a961f4d5b9fc976768609ab19 [2020-07-20 14:50:14,395 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:50:14,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:50:14,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:50:14,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:50:14,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:50:14,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:50:14" (1/1) ... [2020-07-20 14:50:14,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70cc12c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14, skipping insertion in model container [2020-07-20 14:50:14,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:50:14" (1/1) ... [2020-07-20 14:50:14,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:50:14,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:50:14,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:50:14,651 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:50:14,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:50:14,693 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:50:14,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14 WrapperNode [2020-07-20 14:50:14,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:50:14,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:50:14,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:50:14,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:50:14,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14" (1/1) ... [2020-07-20 14:50:14,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14" (1/1) ... [2020-07-20 14:50:14,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14" (1/1) ... [2020-07-20 14:50:14,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14" (1/1) ... [2020-07-20 14:50:14,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14" (1/1) ... [2020-07-20 14:50:14,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14" (1/1) ... [2020-07-20 14:50:14,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14" (1/1) ... [2020-07-20 14:50:14,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:50:14,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:50:14,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:50:14,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:50:14,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14" (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 14:50:14,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:50:14,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:50:14,989 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:50:14,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:50:14,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:50:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:50:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:50:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:50:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:50:14,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:50:14,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:50:14,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:50:14,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:50:15,245 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:50:15,245 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:50:15,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:50:15 BoogieIcfgContainer [2020-07-20 14:50:15,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:50:15,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:50:15,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:50:15,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:50:15,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:50:14" (1/3) ... [2020-07-20 14:50:15,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38075fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:50:15, skipping insertion in model container [2020-07-20 14:50:15,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:50:14" (2/3) ... [2020-07-20 14:50:15,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38075fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:50:15, skipping insertion in model container [2020-07-20 14:50:15,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:50:15" (3/3) ... [2020-07-20 14:50:15,260 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-07-20 14:50:15,272 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:50:15,281 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:50:15,297 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:50:15,324 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:50:15,325 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:50:15,325 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:50:15,325 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:50:15,325 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:50:15,326 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:50:15,326 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:50:15,326 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:50:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-20 14:50:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 14:50:15,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:50:15,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:50:15,352 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:50:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:50:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash 333887070, now seen corresponding path program 1 times [2020-07-20 14:50:15,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:50:15,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560867579] [2020-07-20 14:50:15,367 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 14:50:15,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:50:15,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:50:15,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 14:50:15,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:50:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:15,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:50:15,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560867579] [2020-07-20 14:50:15,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:50:15,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 14:50:15,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37147615] [2020-07-20 14:50:15,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 14:50:15,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:50:15,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 14:50:15,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:50:15,580 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-07-20 14:50:15,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:50:15,607 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-07-20 14:50:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 14:50:15,609 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-20 14:50:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:50:15,619 INFO L225 Difference]: With dead ends: 37 [2020-07-20 14:50:15,620 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 14:50:15,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 14:50:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 14:50:15,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 14:50:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 14:50:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-07-20 14:50:15,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-07-20 14:50:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:50:15,667 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-07-20 14:50:15,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 14:50:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-07-20 14:50:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 14:50:15,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:50:15,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:50:15,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:50:15,886 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:50:15,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:50:15,887 INFO L82 PathProgramCache]: Analyzing trace with hash 309875524, now seen corresponding path program 1 times [2020-07-20 14:50:15,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:50:15,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876453820] [2020-07-20 14:50:15,889 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 14:50:15,935 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:50:15,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:50:15,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 14:50:15,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:50:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:16,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:50:16,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876453820] [2020-07-20 14:50:16,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:50:16,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:50:16,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007144301] [2020-07-20 14:50:16,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:50:16,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:50:16,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:50:16,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:50:16,036 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-07-20 14:50:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:50:16,126 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-07-20 14:50:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:50:16,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 14:50:16,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:50:16,128 INFO L225 Difference]: With dead ends: 34 [2020-07-20 14:50:16,128 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 14:50:16,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:50:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 14:50:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 14:50:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 14:50:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-07-20 14:50:16,137 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2020-07-20 14:50:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:50:16,138 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-07-20 14:50:16,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:50:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-07-20 14:50:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 14:50:16,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:50:16,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:50:16,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:50:16,351 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:50:16,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:50:16,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1451693947, now seen corresponding path program 1 times [2020-07-20 14:50:16,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:50:16,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127950051] [2020-07-20 14:50:16,355 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 14:50:16,394 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:50:16,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:50:16,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 14:50:16,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:50:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:16,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:50:16,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:50:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:20,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127950051] [2020-07-20 14:50:20,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:50:20,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 14:50:20,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872793174] [2020-07-20 14:50:20,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 14:50:20,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:50:20,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 14:50:20,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=134, Unknown=1, NotChecked=0, Total=182 [2020-07-20 14:50:20,656 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 14 states. [2020-07-20 14:50:24,594 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 35 DAG size of output: 12 [2020-07-20 14:50:26,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:50:26,801 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-07-20 14:50:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 14:50:26,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-20 14:50:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:50:26,803 INFO L225 Difference]: With dead ends: 43 [2020-07-20 14:50:26,803 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 14:50:26,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2020-07-20 14:50:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 14:50:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 14:50:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 14:50:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 14:50:26,822 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-20 14:50:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:50:26,822 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 14:50:26,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 14:50:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 14:50:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 14:50:26,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:50:26,825 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:50:27,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:50:27,041 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:50:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:50:27,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1035578608, now seen corresponding path program 1 times [2020-07-20 14:50:27,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:50:27,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027206612] [2020-07-20 14:50:27,043 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 14:50:27,115 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:50:27,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:50:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 14:50:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:50:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:27,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:50:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:35,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027206612] [2020-07-20 14:50:35,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:50:35,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 14:50:35,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089796238] [2020-07-20 14:50:35,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 14:50:35,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:50:35,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 14:50:35,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=31, Unknown=4, NotChecked=0, Total=56 [2020-07-20 14:50:35,471 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-07-20 14:50:37,620 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296))) is different from false [2020-07-20 14:51:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:51:27,577 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2020-07-20 14:51:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 14:51:27,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-20 14:51:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:51:27,581 INFO L225 Difference]: With dead ends: 54 [2020-07-20 14:51:27,581 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 14:51:27,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=23, Invalid=32, Unknown=5, NotChecked=12, Total=72 [2020-07-20 14:51:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 14:51:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-07-20 14:51:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 14:51:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-07-20 14:51:27,590 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 24 [2020-07-20 14:51:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:51:27,590 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-07-20 14:51:27,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 14:51:27,591 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-07-20 14:51:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 14:51:27,592 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:51:27,592 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:51:27,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:51:27,793 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:51:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:51:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2020075371, now seen corresponding path program 1 times [2020-07-20 14:51:27,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:51:27,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737376130] [2020-07-20 14:51:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:51:27,862 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:51:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:51:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 14:51:27,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:51:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:51:28,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:51:28,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:51:30,547 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~l~0 4294967296)) (.cse2 (= 0 (mod (mod c_main_~l~0 4294967296) 5))) (.cse0 (+ c_main_~l~0 1))) (or (< (mod .cse0 4294967296) (mod c_main_~n~0 4294967296)) (and (< .cse1 0) (not .cse2) (= (mod (+ (mod (mod c_main_~l~0 4294967296) 5) 4294967291) 4294967296) 0)) (and (= (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296) 0) (or (<= 0 .cse1) .cse2)) (= (mod .cse0 4294967296) (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 1) 4294967296)))) is different from true [2020-07-20 14:51:32,628 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (mod c_main_~l~0 4294967296))) (let ((.cse6 (< .cse7 0)) (.cse1 (<= 0 .cse7)) (.cse3 (= 0 (mod (mod c_main_~l~0 4294967296) 5))) (.cse5 (= (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296) 0)) (.cse0 (forall ((main_~n~0 Int)) (or (< (mod (+ c_main_~l~0 1) 4294967296) (mod main_~n~0 4294967296)) (<= (mod main_~n~0 4294967296) (mod c_main_~l~0 4294967296))))) (.cse2 (= (mod (+ c_main_~l~0 1) 4294967296) (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 1) 4294967296))) (.cse4 (= (mod (+ (mod (mod c_main_~l~0 4294967296) 5) 4294967291) 4294967296) 0))) (and (or .cse0 .cse1 .cse2 .cse3 .cse4) (or .cse5 .cse0 .cse6 .cse2) (or .cse5 .cse0 (not .cse3) .cse2) (or .cse0 .cse6 .cse1 .cse2 .cse3) (or .cse5 .cse0 .cse2 .cse4)))) is different from false [2020-07-20 14:51:34,728 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse7 (+ c_main_~l~0 1))) (let ((.cse6 (mod .cse7 4294967296))) (let ((.cse3 (= 0 (mod (+ (mod (mod .cse7 4294967296) 5) 4294967291) 4294967296))) (.cse1 (= (mod (mod (mod .cse7 4294967296) 5) 4294967296) 0)) (.cse5 (< .cse6 0)) (.cse0 (= 0 (mod (mod .cse7 4294967296) 5))) (.cse4 (<= 0 .cse6)) (.cse2 (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 1) 4294967296) (mod (+ c_main_~l~0 2) 4294967296)))) (and (or (not .cse0) (forall ((main_~n~0 Int)) (or (<= (mod main_~n~0 4294967296) (mod (+ c_main_~l~0 1) 4294967296)) (< (mod (+ c_main_~l~0 2) 4294967296) (mod main_~n~0 4294967296)))) .cse1 .cse2) (or .cse3 (forall ((v_prenex_2 Int)) (or (<= (mod v_prenex_2 4294967296) (mod (+ c_main_~l~0 1) 4294967296)) (< (mod (+ c_main_~l~0 2) 4294967296) (mod v_prenex_2 4294967296)))) .cse0 .cse4 .cse2) (or .cse5 .cse1 .cse2 (forall ((v_prenex_4 Int)) (or (<= (mod v_prenex_4 4294967296) (mod (+ c_main_~l~0 1) 4294967296)) (< (mod (+ c_main_~l~0 2) 4294967296) (mod v_prenex_4 4294967296))))) (or .cse3 .cse1 (forall ((v_prenex_1 Int)) (or (<= (mod v_prenex_1 4294967296) (mod (+ c_main_~l~0 1) 4294967296)) (< (mod (+ c_main_~l~0 2) 4294967296) (mod v_prenex_1 4294967296)))) .cse2) (or (forall ((v_prenex_3 Int)) (or (<= (mod v_prenex_3 4294967296) (mod (+ c_main_~l~0 1) 4294967296)) (< (mod (+ c_main_~l~0 2) 4294967296) (mod v_prenex_3 4294967296)))) .cse5 .cse0 .cse4 .cse2))))) is different from true [2020-07-20 14:51:55,590 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2020-07-20 14:52:06,004 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 14:52:18,664 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 14:52:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 3 times theorem prover too weak. 0 trivial. 7 not checked. [2020-07-20 14:52:18,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737376130] [2020-07-20 14:52:18,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:52:18,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2020-07-20 14:52:18,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660741903] [2020-07-20 14:52:18,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 14:52:18,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:52:18,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 14:52:18,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=288, Unknown=18, NotChecked=114, Total=506 [2020-07-20 14:52:18,688 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 23 states. [2020-07-20 14:52:21,115 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_prenex_1 Int)) (or (< (mod (+ c_main_~l~0 3) 4294967296) (mod v_prenex_1 4294967296)) (<= (mod v_prenex_1 4294967296) (mod (+ c_main_~l~0 2) 4294967296))))) (.cse1 (mod (+ c_main_~l~0 3) 4294967296)) (.cse2 (= 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 5) 4294967296)))) (and (or .cse0 (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 3) 4294967296) .cse1) .cse2) (or .cse0 (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 2) 4294967296) .cse1) .cse2) (let ((.cse3 (+ c_main_~l~0 1))) (or (= (mod .cse3 4294967296) (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0) 4294967296)) (< (mod .cse3 4294967296) (mod c_main_~n~0 4294967296)))))) is different from false [2020-07-20 14:52:23,180 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_prenex_1 Int)) (or (< (mod (+ c_main_~l~0 3) 4294967296) (mod v_prenex_1 4294967296)) (<= (mod v_prenex_1 4294967296) (mod (+ c_main_~l~0 2) 4294967296))))) (.cse1 (mod (+ c_main_~l~0 3) 4294967296)) (.cse2 (= 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 5) 4294967296)))) (and (or .cse0 (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 3) 4294967296) .cse1) .cse2) (or .cse0 (= (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 2) 4294967296) .cse1) .cse2) (let ((.cse3 (+ c_main_~l~0 1))) (or (= (mod .cse3 4294967296) (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0) 4294967296)) (< (mod .cse3 4294967296) (mod c_main_~n~0 4294967296)))))) is different from true [2020-07-20 14:52:25,277 WARN L838 $PredicateComparison]: unable to prove that (and (or (= (mod c_main_~l~0 4294967296) (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0) 4294967296)) (< (mod c_main_~l~0 4294967296) (mod c_main_~n~0 4294967296))) (or (= (mod (+ c_main_~l~0 2) 4294967296) (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 2) 4294967296)) (forall ((v_prenex_1 Int)) (or (< (mod (+ c_main_~l~0 2) 4294967296) (mod v_prenex_1 4294967296)) (<= (mod v_prenex_1 4294967296) (mod (+ c_main_~l~0 1) 4294967296)))) (= (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296) 0))) is different from false [2020-07-20 14:52:27,350 WARN L860 $PredicateComparison]: unable to prove that (and (or (= (mod c_main_~l~0 4294967296) (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0) 4294967296)) (< (mod c_main_~l~0 4294967296) (mod c_main_~n~0 4294967296))) (or (= (mod (+ c_main_~l~0 2) 4294967296) (mod (+ c_main_~v4~0 c_main_~i~0 c_main_~j~0 c_main_~k~0 c_main_~v3~0 2) 4294967296)) (forall ((v_prenex_1 Int)) (or (< (mod (+ c_main_~l~0 2) 4294967296) (mod v_prenex_1 4294967296)) (<= (mod v_prenex_1 4294967296) (mod (+ c_main_~l~0 1) 4294967296)))) (= (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296) 0))) is different from true [2020-07-20 14:53:31,643 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-07-20 14:54:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:54:09,272 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2020-07-20 14:54:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 14:54:09,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-07-20 14:54:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:54:09,276 INFO L225 Difference]: With dead ends: 70 [2020-07-20 14:54:09,277 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 14:54:09,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 76.0s TimeCoverageRelationStatistics Valid=114, Invalid=385, Unknown=27, NotChecked=230, Total=756 [2020-07-20 14:54:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 14:54:09,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 14:54:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 14:54:09,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-07-20 14:54:09,287 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 27 [2020-07-20 14:54:09,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:54:09,288 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-07-20 14:54:09,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 14:54:09,288 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-07-20 14:54:09,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 14:54:09,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:54:09,289 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:54:09,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:54:09,494 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:54:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:54:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1204685030, now seen corresponding path program 1 times [2020-07-20 14:54:09,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:54:09,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029944699] [2020-07-20 14:54:09,498 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 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 [2020-07-20 14:54:09,581 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:54:09,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:54:09,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 14:54:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:54:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:54:09,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:54:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:54:22,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029944699] [2020-07-20 14:54:22,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:54:22,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 14:54:22,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316395076] [2020-07-20 14:54:22,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 14:54:22,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:54:22,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 14:54:22,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=85, Unknown=6, NotChecked=0, Total=132 [2020-07-20 14:54:22,162 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 12 states. [2020-07-20 14:54:24,325 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296))) is different from false [2020-07-20 14:54:26,387 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296))) is different from false [2020-07-20 14:54:30,525 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296))) is different from false [2020-07-20 14:54:40,902 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296))) is different from false [2020-07-20 14:55:21,478 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296))) is different from false [2020-07-20 14:55:49,401 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296))) is different from false [2020-07-20 14:56:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:56:17,073 INFO L93 Difference]: Finished difference Result 90 states and 129 transitions. [2020-07-20 14:56:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 14:56:17,202 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-07-20 14:56:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:56:17,203 INFO L225 Difference]: With dead ends: 90 [2020-07-20 14:56:17,203 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 14:56:17,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=53, Invalid=91, Unknown=12, NotChecked=150, Total=306 [2020-07-20 14:56:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 14:56:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-07-20 14:56:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 14:56:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 93 transitions. [2020-07-20 14:56:17,214 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 93 transitions. Word has length 35 [2020-07-20 14:56:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:56:17,215 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 93 transitions. [2020-07-20 14:56:17,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 14:56:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 93 transitions. [2020-07-20 14:56:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 14:56:17,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:56:17,218 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:56:17,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:56:17,422 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:56:17,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:56:17,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1013904368, now seen corresponding path program 1 times [2020-07-20 14:56:17,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:56:17,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568717620] [2020-07-20 14:56:17,424 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 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