/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:36:44,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:36:44,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:36:44,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:36:44,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:36:44,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:36:44,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:36:44,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:36:44,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:36:44,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:36:44,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:36:44,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:36:44,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:36:44,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:36:44,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:36:44,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:36:44,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:36:44,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:36:44,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:36:44,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:36:44,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:36:44,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:36:44,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:36:44,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:36:44,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:36:44,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:36:44,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:36:44,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:36:44,218 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 20:36:44,250 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:36:44,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:36:44,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:36:44,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:36:44,254 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:36:44,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:36:44,254 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:36:44,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:36:44,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:36:44,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:36:44,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:36:44,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:36:44,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:36:44,257 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:36:44,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:36:44,257 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:36:44,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:36:44,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:36:44,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:36:44,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:36:44,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:36:44,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:36:44,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:36:44,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:36:44,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:36:44,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:36:44,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:44,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:36:44,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:36:44,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:36:44,586 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:36:44,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:36:44,609 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:36:44,611 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:36:44,612 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:36:44,612 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-07-21 20:36:44,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64066e553/c0519e1807f14580bbf6dbe6143504da/FLAG9b501de18 [2020-07-21 20:36:45,254 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:36:45,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-07-21 20:36:45,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64066e553/c0519e1807f14580bbf6dbe6143504da/FLAG9b501de18 [2020-07-21 20:36:45,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64066e553/c0519e1807f14580bbf6dbe6143504da [2020-07-21 20:36:45,536 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:36:45,540 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:36:45,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:36:45,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:36:45,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:36:45,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:36:45" (1/1) ... [2020-07-21 20:36:45,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1080aa11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:45, skipping insertion in model container [2020-07-21 20:36:45,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:36:45" (1/1) ... [2020-07-21 20:36:45,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:36:45,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:36:45,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:36:46,001 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:36:46,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:36:46,104 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:36:46,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:46 WrapperNode [2020-07-21 20:36:46,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:36:46,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:36:46,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:36:46,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:36:46,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:46" (1/1) ... [2020-07-21 20:36:46,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:46" (1/1) ... [2020-07-21 20:36:46,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:46" (1/1) ... [2020-07-21 20:36:46,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:46" (1/1) ... [2020-07-21 20:36:46,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:46" (1/1) ... [2020-07-21 20:36:46,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:46" (1/1) ... [2020-07-21 20:36:46,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:46" (1/1) ... [2020-07-21 20:36:46,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:36:46,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:36:46,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:36:46,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:36:46,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:46" (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 20:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:36:46,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:36:46,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:36:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:36:46,291 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-21 20:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-21 20:36:46,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:36:46,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 20:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 20:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:36:46,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:36:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 20:36:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:36:49,237 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:36:49,237 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 20:36:49,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:36:49 BoogieIcfgContainer [2020-07-21 20:36:49,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:36:49,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:36:49,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:36:49,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:36:49,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:36:45" (1/3) ... [2020-07-21 20:36:49,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2171ab7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:36:49, skipping insertion in model container [2020-07-21 20:36:49,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:46" (2/3) ... [2020-07-21 20:36:49,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2171ab7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:36:49, skipping insertion in model container [2020-07-21 20:36:49,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:36:49" (3/3) ... [2020-07-21 20:36:49,260 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-07-21 20:36:49,273 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:36:49,283 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:36:49,298 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:36:49,320 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:36:49,320 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:36:49,320 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:36:49,321 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:36:49,321 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:36:49,321 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:36:49,321 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:36:49,322 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:36:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 20:36:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 20:36:49,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:49,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:49,350 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:49,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:49,356 INFO L82 PathProgramCache]: Analyzing trace with hash 316900320, now seen corresponding path program 1 times [2020-07-21 20:36:49,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:49,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070168719] [2020-07-21 20:36:49,364 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 20:36:49,629 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:36:49,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:49,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:36:49,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:49,692 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 20:36:49,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:36:49,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070168719] [2020-07-21 20:36:49,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:36:49,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:36:49,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508279124] [2020-07-21 20:36:49,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:36:49,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:49,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:36:49,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:36:49,722 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2020-07-21 20:36:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:49,803 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-07-21 20:36:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:36:49,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-21 20:36:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:49,818 INFO L225 Difference]: With dead ends: 46 [2020-07-21 20:36:49,818 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 20:36:49,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:36:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 20:36:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-07-21 20:36:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 20:36:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 20:36:49,871 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 20:36:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:49,871 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 20:36:49,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:36:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 20:36:49,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 20:36:49,873 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:49,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:50,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:50,089 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:50,090 INFO L82 PathProgramCache]: Analyzing trace with hash 316483246, now seen corresponding path program 1 times [2020-07-21 20:36:50,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:50,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308770916] [2020-07-21 20:36:50,091 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 20:36:52,827 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:36:52,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:52,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:36:52,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:52,869 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 20:36:52,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:36:52,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308770916] [2020-07-21 20:36:52,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:36:52,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:36:52,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072278322] [2020-07-21 20:36:52,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:36:52,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:52,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:36:52,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:36:52,879 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-07-21 20:36:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:52,928 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-07-21 20:36:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:36:52,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-21 20:36:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:52,930 INFO L225 Difference]: With dead ends: 28 [2020-07-21 20:36:52,931 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 20:36:52,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:36:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 20:36:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-07-21 20:36:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 20:36:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 20:36:52,951 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-07-21 20:36:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:52,952 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 20:36:52,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:36:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 20:36:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 20:36:52,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:52,955 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:53,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:53,156 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 625969832, now seen corresponding path program 1 times [2020-07-21 20:36:53,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:53,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704982750] [2020-07-21 20:36:53,159 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 20:37:02,370 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:37:02,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:37:02,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:37:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:37:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:37:02,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:37:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:37:02,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704982750] [2020-07-21 20:37:02,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:37:02,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 20:37:02,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168452649] [2020-07-21 20:37:02,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 20:37:02,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:37:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 20:37:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:37:02,500 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-07-21 20:37:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:37:04,863 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-07-21 20:37:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:37:04,868 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-21 20:37:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:37:04,871 INFO L225 Difference]: With dead ends: 53 [2020-07-21 20:37:04,872 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 20:37:04,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-21 20:37:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 20:37:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-07-21 20:37:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 20:37:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-07-21 20:37:04,899 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 19 [2020-07-21 20:37:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:37:04,900 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-07-21 20:37:04,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 20:37:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-07-21 20:37:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 20:37:04,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:37:04,903 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:37:05,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:37:05,105 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:37:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:37:05,105 INFO L82 PathProgramCache]: Analyzing trace with hash 599808768, now seen corresponding path program 2 times [2020-07-21 20:37:05,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:37:05,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135850549] [2020-07-21 20:37:05,107 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 20:37:21,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:37:21,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:37:21,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 20:37:21,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:37:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:37:21,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:37:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:37:21,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135850549] [2020-07-21 20:37:21,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:37:21,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 20:37:21,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581564850] [2020-07-21 20:37:21,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 20:37:21,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:37:21,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 20:37:21,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-07-21 20:37:21,361 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-07-21 20:37:28,524 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 20:37:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:37:28,715 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-07-21 20:37:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 20:37:28,715 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-07-21 20:37:28,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:37:28,719 INFO L225 Difference]: With dead ends: 89 [2020-07-21 20:37:28,720 INFO L226 Difference]: Without dead ends: 79 [2020-07-21 20:37:28,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2020-07-21 20:37:28,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-21 20:37:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2020-07-21 20:37:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 20:37:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-07-21 20:37:28,743 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 37 [2020-07-21 20:37:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:37:28,744 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-07-21 20:37:28,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 20:37:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-07-21 20:37:28,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 20:37:28,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:37:28,749 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:37:28,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:37:28,957 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:37:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:37:28,958 INFO L82 PathProgramCache]: Analyzing trace with hash 740837808, now seen corresponding path program 3 times [2020-07-21 20:37:28,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:37:28,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777721799] [2020-07-21 20:37:28,960 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 20:37:57,159 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:37:57,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:37:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 20:37:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:37:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:37:58,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:38:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 293 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:38:05,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777721799] [2020-07-21 20:38:05,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:38:05,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 20:38:05,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150743582] [2020-07-21 20:38:05,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 20:38:05,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:38:05,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 20:38:05,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=476, Unknown=3, NotChecked=0, Total=650 [2020-07-21 20:38:05,554 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 26 states. [2020-07-21 20:38:26,981 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-21 20:38:27,706 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-21 20:38:30,339 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-21 20:38:33,001 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-21 20:38:39,969 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-21 20:38:41,132 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-21 20:38:53,986 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-07-21 20:39:00,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:39:00,470 INFO L93 Difference]: Finished difference Result 161 states and 175 transitions. [2020-07-21 20:39:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 20:39:00,471 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-07-21 20:39:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:39:00,473 INFO L225 Difference]: With dead ends: 161 [2020-07-21 20:39:00,473 INFO L226 Difference]: Without dead ends: 151 [2020-07-21 20:39:00,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=664, Invalid=1780, Unknown=6, NotChecked=0, Total=2450 [2020-07-21 20:39:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-21 20:39:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2020-07-21 20:39:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-21 20:39:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2020-07-21 20:39:00,495 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 73 [2020-07-21 20:39:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:39:00,495 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2020-07-21 20:39:00,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 20:39:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2020-07-21 20:39:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-21 20:39:00,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:39:00,502 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:39:00,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:39:00,716 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:39:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:39:00,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1184145648, now seen corresponding path program 4 times [2020-07-21 20:39:00,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:39:00,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358520020] [2020-07-21 20:39:00,719 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 20:42:20,100 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:42:20,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:42:33,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-21 20:42:34,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:42:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 44 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:42:34,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:42:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 44 proven. 1428 refuted. 24 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:42:58,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358520020] [2020-07-21 20:42:58,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:42:58,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 20:42:58,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463276005] [2020-07-21 20:42:58,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 20:42:58,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:42:58,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 20:42:58,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1818, Unknown=11, NotChecked=0, Total=2450 [2020-07-21 20:42:58,992 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 50 states. [2020-07-21 20:43:32,823 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 99 DAG size of output: 14 [2020-07-21 20:43:36,539 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 15 [2020-07-21 20:43:40,768 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 15 [2020-07-21 20:43:49,763 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 90 DAG size of output: 15 [2020-07-21 20:43:59,984 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 15 [2020-07-21 20:44:13,791 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 80 DAG size of output: 15 [2020-07-21 20:44:21,379 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2020-07-21 20:44:31,504 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 15 [2020-07-21 20:44:38,803 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 15 [2020-07-21 20:44:46,124 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-21 20:44:58,363 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-21 20:45:04,317 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-21 20:45:10,624 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-21 20:45:24,442 WARN L193 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2020-07-21 20:45:29,683 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2020-07-21 20:45:39,448 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-07-21 20:45:46,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:45:46,275 INFO L93 Difference]: Finished difference Result 281 states and 303 transitions. [2020-07-21 20:45:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-21 20:45:46,276 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2020-07-21 20:45:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:45:46,279 INFO L225 Difference]: With dead ends: 281 [2020-07-21 20:45:46,280 INFO L226 Difference]: Without dead ends: 271 [2020-07-21 20:45:46,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 159.0s TimeCoverageRelationStatistics Valid=2175, Invalid=6544, Unknown=23, NotChecked=0, Total=8742 [2020-07-21 20:45:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-21 20:45:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 266. [2020-07-21 20:45:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-07-21 20:45:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2020-07-21 20:45:46,319 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 145 [2020-07-21 20:45:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:45:46,320 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2020-07-21 20:45:46,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 20:45:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2020-07-21 20:45:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-07-21 20:45:46,334 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:45:46,334 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:45:46,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:45:46,551 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:45:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:45:46,552 INFO L82 PathProgramCache]: Analyzing trace with hash 713884336, now seen corresponding path program 5 times [2020-07-21 20:45:46,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:45:46,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786722007] [2020-07-21 20:45:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in