/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:44:49,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:44:49,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:44:49,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:44:49,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:44:49,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:44:49,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:44:49,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:44:49,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:44:49,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:44:49,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:44:49,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:44:49,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:44:49,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:44:49,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:44:49,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:44:49,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:44:49,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:44:49,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:44:49,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:44:49,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:44:49,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:44:49,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:44:49,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:44:49,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:44:49,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:44:49,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:44:49,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:44:49,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:44:49,293 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:44:49,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:44:49,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:44:49,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:44:49,297 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:44:49,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:44:49,297 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:44:49,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:44:49,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:44:49,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:44:49,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:44:49,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:44:49,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:44:49,299 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:44:49,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:44:49,299 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:44:49,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:44:49,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:44:49,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:44:49,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:44:49,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:44:49,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:44:49,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:44:49,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:44:49,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:44:49,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:44:49,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:49,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:44:49,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:44:49,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:44:49,584 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:44:49,597 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:44:49,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:44:49,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:44:49,602 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:44:49,603 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-07-21 16:44:49,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5132051c/3ad57f8d0b8140a68cb7e093dbd4af29/FLAG99eb120b7 [2020-07-21 16:44:50,099 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:44:50,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-07-21 16:44:50,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5132051c/3ad57f8d0b8140a68cb7e093dbd4af29/FLAG99eb120b7 [2020-07-21 16:44:50,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5132051c/3ad57f8d0b8140a68cb7e093dbd4af29 [2020-07-21 16:44:50,503 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:44:50,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:44:50,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:50,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:44:50,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:44:50,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:50" (1/1) ... [2020-07-21 16:44:50,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4f62c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50, skipping insertion in model container [2020-07-21 16:44:50,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:50" (1/1) ... [2020-07-21 16:44:50,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:44:50,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:44:50,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:50,711 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:44:50,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:50,738 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:44:50,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50 WrapperNode [2020-07-21 16:44:50,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:50,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:44:50,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:44:50,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:44:50,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50" (1/1) ... [2020-07-21 16:44:50,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50" (1/1) ... [2020-07-21 16:44:50,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50" (1/1) ... [2020-07-21 16:44:50,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50" (1/1) ... [2020-07-21 16:44:50,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50" (1/1) ... [2020-07-21 16:44:50,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50" (1/1) ... [2020-07-21 16:44:50,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50" (1/1) ... [2020-07-21 16:44:50,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:44:50,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:44:50,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:44:50,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:44:50,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:44:50,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:44:50,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:44:50,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:44:50,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:44:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:44:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:44:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:44:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:44:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:44:51,084 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:44:51,085 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:44:51,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:51 BoogieIcfgContainer [2020-07-21 16:44:51,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:44:51,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:44:51,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:44:51,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:44:51,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:44:50" (1/3) ... [2020-07-21 16:44:51,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b634cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:51, skipping insertion in model container [2020-07-21 16:44:51,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:50" (2/3) ... [2020-07-21 16:44:51,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b634cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:51, skipping insertion in model container [2020-07-21 16:44:51,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:51" (3/3) ... [2020-07-21 16:44:51,096 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-07-21 16:44:51,106 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:44:51,113 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:44:51,127 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:44:51,151 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:44:51,151 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:44:51,152 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:44:51,152 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:44:51,152 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:44:51,152 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:44:51,152 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:44:51,152 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:44:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 16:44:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 16:44:51,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:51,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:51,178 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:51,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-21 16:44:51,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:51,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312959230] [2020-07-21 16:44:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:51,254 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:51,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:44:51,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:51,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:51,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312959230] [2020-07-21 16:44:51,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:51,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:44:51,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607430712] [2020-07-21 16:44:51,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:44:51,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:51,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:44:51,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:44:51,343 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-21 16:44:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:51,384 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 16:44:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:44:51,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 16:44:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:51,394 INFO L225 Difference]: With dead ends: 29 [2020-07-21 16:44:51,395 INFO L226 Difference]: Without dead ends: 12 [2020-07-21 16:44:51,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:44:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-21 16:44:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-21 16:44:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-21 16:44:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-21 16:44:51,433 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-21 16:44:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:51,434 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-21 16:44:51,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:44:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-21 16:44:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 16:44:51,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:51,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:51,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:51,643 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:51,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-21 16:44:51,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:51,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933885199] [2020-07-21 16:44:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:51,676 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:51,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:44:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:51,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:51,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933885199] [2020-07-21 16:44:51,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:51,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 16:44:51,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072394307] [2020-07-21 16:44:51,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:44:51,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:51,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:44:51,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:44:51,757 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-07-21 16:44:51,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:51,839 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 16:44:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:44:51,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 16:44:51,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:51,841 INFO L225 Difference]: With dead ends: 20 [2020-07-21 16:44:51,841 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 16:44:51,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:44:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 16:44:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 16:44:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 16:44:51,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 16:44:51,848 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-21 16:44:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:51,849 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 16:44:51,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:44:51,849 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 16:44:51,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:44:51,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:51,852 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:52,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:52,067 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2020-07-21 16:44:52,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:52,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154838701] [2020-07-21 16:44:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:52,111 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:52,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:52,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 16:44:52,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:52,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:54,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154838701] [2020-07-21 16:44:54,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:54,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 16:44:54,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408506072] [2020-07-21 16:44:54,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 16:44:54,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:54,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 16:44:54,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=85, Unknown=1, NotChecked=0, Total=132 [2020-07-21 16:44:54,387 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-21 16:44:56,555 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 16:44:58,812 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2020-07-21 16:45:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:45:03,094 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-07-21 16:45:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:45:03,095 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-21 16:45:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:45:03,096 INFO L225 Difference]: With dead ends: 26 [2020-07-21 16:45:03,096 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 16:45:03,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=94, Invalid=145, Unknown=1, NotChecked=0, Total=240 [2020-07-21 16:45:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 16:45:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 16:45:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 16:45:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-21 16:45:03,108 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2020-07-21 16:45:03,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:45:03,108 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-21 16:45:03,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 16:45:03,108 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-21 16:45:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 16:45:03,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:45:03,110 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:45:03,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:45:03,313 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:45:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:45:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1348629730, now seen corresponding path program 3 times [2020-07-21 16:45:03,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:45:03,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351274642] [2020-07-21 16:45:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:45:03,410 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:45:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:45:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 16:45:03,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:45:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:45:03,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:45:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 52 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:45:14,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351274642] [2020-07-21 16:45:14,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:45:14,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 16:45:14,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524682565] [2020-07-21 16:45:14,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 16:45:14,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:45:14,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 16:45:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=381, Unknown=5, NotChecked=0, Total=552 [2020-07-21 16:45:14,421 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 24 states. [2020-07-21 16:45:15,046 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 16:45:17,494 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 16:45:21,800 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 16:45:27,936 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 16:45:37,308 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2020-07-21 16:45:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:45:43,758 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-21 16:45:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 16:45:43,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2020-07-21 16:45:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:45:43,760 INFO L225 Difference]: With dead ends: 38 [2020-07-21 16:45:43,760 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 16:45:43,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=405, Invalid=711, Unknown=6, NotChecked=0, Total=1122 [2020-07-21 16:45:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 16:45:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 16:45:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 16:45:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-07-21 16:45:43,769 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2020-07-21 16:45:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:45:43,769 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-07-21 16:45:43,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 16:45:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-07-21 16:45:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 16:45:43,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:45:43,771 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:45:43,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:45:43,974 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:45:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:45:43,975 INFO L82 PathProgramCache]: Analyzing trace with hash 144400734, now seen corresponding path program 4 times [2020-07-21 16:45:43,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:45:43,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376740158] [2020-07-21 16:45:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:45:44,112 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:45:44,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:45:44,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 16:45:44,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:45:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:45:44,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:46:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 242 refuted. 11 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:46:27,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376740158] [2020-07-21 16:46:27,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:46:27,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 16:46:27,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165804322] [2020-07-21 16:46:27,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 16:46:27,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:46:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 16:46:27,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1614, Unknown=20, NotChecked=0, Total=2256 [2020-07-21 16:46:27,488 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 48 states. [2020-07-21 16:46:29,517 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2020-07-21 16:46:34,063 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 111 DAG size of output: 11 [2020-07-21 16:46:41,076 WARN L193 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 106 DAG size of output: 11 [2020-07-21 16:46:50,880 WARN L193 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 101 DAG size of output: 11 [2020-07-21 16:46:56,111 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 11 [2020-07-21 16:47:05,248 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2020-07-21 16:47:13,131 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 86 DAG size of output: 11 [2020-07-21 16:47:18,314 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 11 [2020-07-21 16:47:29,272 WARN L193 SmtUtils]: Spent 4.81 s on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2020-07-21 16:47:45,229 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-21 16:47:57,155 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-21 16:48:07,229 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-21 16:48:24,265 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 16:48:33,990 WARN L193 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 16:48:45,884 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 16:49:15,340 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 16:49:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:49:41,408 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-21 16:49:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-21 16:49:41,410 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 32 [2020-07-21 16:49:41,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:49:41,411 INFO L225 Difference]: With dead ends: 62 [2020-07-21 16:49:41,411 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 16:49:41,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 236.6s TimeCoverageRelationStatistics Valid=1671, Invalid=3120, Unknown=39, NotChecked=0, Total=4830 [2020-07-21 16:49:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 16:49:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 16:49:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 16:49:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-07-21 16:49:41,425 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2020-07-21 16:49:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:49:41,425 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-07-21 16:49:41,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 16:49:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-07-21 16:49:41,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 16:49:41,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:49:41,428 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:49:41,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:49:41,631 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:49:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:49:41,632 INFO L82 PathProgramCache]: Analyzing trace with hash -726077986, now seen corresponding path program 5 times [2020-07-21 16:49:41,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:49:41,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555436132] [2020-07-21 16:49:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:49:42,532 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:49:42,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:49:42,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-21 16:49:42,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:49:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:49:44,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:51:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1043 refuted. 38 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:51:36,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555436132] [2020-07-21 16:51:36,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:51:36,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-21 16:51:36,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331247379] [2020-07-21 16:51:36,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-21 16:51:36,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:51:36,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-21 16:51:36,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6671, Unknown=51, NotChecked=0, Total=9120 [2020-07-21 16:51:36,854 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 96 states. [2020-07-21 16:51:56,234 WARN L193 SmtUtils]: Spent 9.49 s on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2020-07-21 16:52:19,767 WARN L193 SmtUtils]: Spent 13.58 s on a formula simplification. DAG size of input: 231 DAG size of output: 11 [2020-07-21 16:52:54,580 WARN L193 SmtUtils]: Spent 11.65 s on a formula simplification. DAG size of input: 226 DAG size of output: 11 [2020-07-21 16:53:18,179 WARN L193 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2020-07-21 16:54:01,174 WARN L193 SmtUtils]: Spent 16.15 s on a formula simplification. DAG size of input: 216 DAG size of output: 16 [2020-07-21 16:54:31,222 WARN L193 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 211 DAG size of output: 11 [2020-07-21 16:55:02,779 WARN L193 SmtUtils]: Spent 6.44 s on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2020-07-21 16:55:04,814 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~y~0 14) 4294967296) 1024) (< (mod (+ c_main_~y~0 24) 4294967296) 1024) (< (mod (+ c_main_~y~0 3) 4294967296) 1024) (< (mod (+ c_main_~y~0 26) 4294967296) 1024) (< (mod (+ c_main_~y~0 10) 4294967296) 1024) (< (mod (+ c_main_~y~0 29) 4294967296) 1024) (< (mod (+ c_main_~y~0 22) 4294967296) 1024) (< (mod (+ c_main_~y~0 36) 4294967296) 1024) (< (mod (+ c_main_~y~0 11) 4294967296) 1024) (< (mod (+ c_main_~y~0 35) 4294967296) 1024) (< (mod (+ c_main_~y~0 32) 4294967296) 1024) (< (mod (+ c_main_~y~0 5) 4294967296) 1024) (< (mod (+ c_main_~y~0 8) 4294967296) 1024) (< (mod (+ c_main_~y~0 25) 4294967296) 1024) (< (mod (+ c_main_~y~0 27) 4294967296) 1024) (< (mod (+ c_main_~y~0 9) 4294967296) 1024) (< (mod (+ c_main_~y~0 4) 4294967296) 1024) (< (mod (+ c_main_~y~0 28) 4294967296) 1024) (< (mod (+ c_main_~y~0 23) 4294967296) 1024) (< (mod (+ c_main_~y~0 17) 4294967296) 1024) (< (mod (+ c_main_~y~0 30) 4294967296) 1024) (< (mod (+ c_main_~y~0 2) 4294967296) 1024) (< (mod (+ c_main_~y~0 7) 4294967296) 1024) (< (mod (+ c_main_~y~0 20) 4294967296) 1024) (< (mod (+ c_main_~y~0 6) 4294967296) 1024) (< (mod (+ c_main_~y~0 21) 4294967296) 1024) (< (mod (+ c_main_~y~0 18) 4294967296) 1024) (< (mod (+ c_main_~y~0 33) 4294967296) 1024) (< (mod (+ c_main_~y~0 37) 4294967296) 1024) (< (mod (+ c_main_~y~0 19) 4294967296) 1024) (< (mod (+ c_main_~y~0 1) 4294967296) 1024) (< (mod (+ c_main_~y~0 39) 4294967296) 1024) (< (mod (+ c_main_~y~0 38) 4294967296) 1024) (< (mod c_main_~y~0 4294967296) 1024) (< (mod (+ c_main_~y~0 12) 4294967296) 1024) (< (mod (+ c_main_~y~0 13) 4294967296) 1024) (< (mod (+ c_main_~y~0 31) 4294967296) 1024) (< (mod (+ c_main_~y~0 15) 4294967296) 1024) (< (mod (+ c_main_~y~0 16) 4294967296) 1024) (< (mod (+ c_main_~y~0 34) 4294967296) 1024)) is different from false [2020-07-21 16:55:33,593 WARN L193 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 196 DAG size of output: 11 [2020-07-21 16:56:08,392 WARN L193 SmtUtils]: Spent 6.89 s on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2020-07-21 16:56:57,454 WARN L193 SmtUtils]: Spent 5.93 s on a formula simplification. DAG size of input: 186 DAG size of output: 11 [2020-07-21 16:57:41,100 WARN L193 SmtUtils]: Spent 6.69 s on a formula simplification. DAG size of input: 181 DAG size of output: 11 [2020-07-21 16:58:19,368 WARN L193 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2020-07-21 16:59:02,400 WARN L193 SmtUtils]: Spent 6.21 s on a formula simplification. DAG size of input: 171 DAG size of output: 11