/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o200.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:08:54,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:08:54,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:08:54,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:08:54,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:08:54,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:08:54,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:08:54,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:08:54,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:08:54,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:08:54,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:08:54,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:08:54,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:08:54,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:08:54,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:08:54,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:08:54,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:08:54,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:08:54,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:08:54,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:08:54,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:08:54,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:08:54,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:08:54,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:08:54,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:08:54,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:08:54,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:08:54,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:08:54,426 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 11:08:54,477 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:08:54,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:08:54,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:08:54,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:08:54,482 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:08:54,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:08:54,483 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:08:54,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:08:54,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:08:54,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:08:54,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:08:54,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:08:54,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:08:54,486 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:08:54,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:08:54,487 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:08:54,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:08:54,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:08:54,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:08:54,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:08:54,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:08:54,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:08:54,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:08:54,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:08:54,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:08:54,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:08:54,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:08:54,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:08:54,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:08:54,494 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 -> NOT_INCREMENTALLY [2020-07-21 11:08:55,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:08:55,069 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:08:55,076 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:08:55,079 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:08:55,092 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:08:55,093 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o200.c [2020-07-21 11:08:55,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8242a76b1/0a79221e34844a18892cda3b9e6e3baf/FLAG8f3d137c5 [2020-07-21 11:08:56,005 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:08:56,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o200.c [2020-07-21 11:08:56,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8242a76b1/0a79221e34844a18892cda3b9e6e3baf/FLAG8f3d137c5 [2020-07-21 11:08:56,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8242a76b1/0a79221e34844a18892cda3b9e6e3baf [2020-07-21 11:08:56,067 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:08:56,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:08:56,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:08:56,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:08:56,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:08:56,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:56" (1/1) ... [2020-07-21 11:08:56,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd352b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56, skipping insertion in model container [2020-07-21 11:08:56,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:56" (1/1) ... [2020-07-21 11:08:56,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:08:56,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:08:56,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:08:56,528 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:08:56,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:08:56,579 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:08:56,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56 WrapperNode [2020-07-21 11:08:56,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:08:56,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:08:56,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:08:56,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:08:56,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56" (1/1) ... [2020-07-21 11:08:56,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56" (1/1) ... [2020-07-21 11:08:56,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56" (1/1) ... [2020-07-21 11:08:56,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56" (1/1) ... [2020-07-21 11:08:56,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56" (1/1) ... [2020-07-21 11:08:56,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56" (1/1) ... [2020-07-21 11:08:56,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56" (1/1) ... [2020-07-21 11:08:56,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:08:56,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:08:56,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:08:56,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:08:56,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56" (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 11:08:56,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:08:56,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:08:56,850 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 11:08:56,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:08:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 11:08:56,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:08:56,851 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 11:08:56,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:08:56,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:08:56,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:08:57,098 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:08:57,099 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 11:08:57,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:57 BoogieIcfgContainer [2020-07-21 11:08:57,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:08:57,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:08:57,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:08:57,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:08:57,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:08:56" (1/3) ... [2020-07-21 11:08:57,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575e01f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:57, skipping insertion in model container [2020-07-21 11:08:57,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:56" (2/3) ... [2020-07-21 11:08:57,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575e01f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:57, skipping insertion in model container [2020-07-21 11:08:57,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:57" (3/3) ... [2020-07-21 11:08:57,120 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o200.c [2020-07-21 11:08:57,138 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:08:57,151 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:08:57,175 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:08:57,208 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:08:57,209 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:08:57,209 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:08:57,209 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:08:57,209 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:08:57,210 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:08:57,210 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:08:57,210 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:08:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 11:08:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:08:57,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:08:57,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:08:57,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:08:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:08:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-21 11:08:57,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:08:57,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527564249] [2020-07-21 11:08:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:08:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:08:57,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 11:08:57,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:08:57,637 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 11:08:57,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:08:57,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527564249] [2020-07-21 11:08:57,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:08:57,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:08:57,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017217906] [2020-07-21 11:08:57,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:08:57,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:08:57,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:08:57,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:08:57,680 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 11:08:57,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:08:57,771 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-21 11:08:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:08:57,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 11:08:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:08:57,793 INFO L225 Difference]: With dead ends: 32 [2020-07-21 11:08:57,793 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 11:08:57,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:08:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 11:08:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 11:08:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 11:08:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 11:08:57,866 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 11:08:57,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:08:57,867 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 11:08:57,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:08:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 11:08:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:08:57,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:08:57,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:08:58,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:08:58,087 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:08:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:08:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-21 11:08:58,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:08:58,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290368846] [2020-07-21 11:08:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:08:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:08:58,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 11:08:58,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:08:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:08:58,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:08:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:08:58,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290368846] [2020-07-21 11:08:58,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:08:58,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 11:08:58,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142023584] [2020-07-21 11:08:58,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 11:08:58,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:08:58,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 11:08:58,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:08:58,561 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-07-21 11:08:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:08:58,669 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-21 11:08:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:08:58,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-07-21 11:08:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:08:58,671 INFO L225 Difference]: With dead ends: 30 [2020-07-21 11:08:58,671 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 11:08:58,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:08:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 11:08:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 11:08:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 11:08:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 11:08:58,685 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-07-21 11:08:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:08:58,685 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 11:08:58,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 11:08:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 11:08:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 11:08:58,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:08:58,688 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:08:58,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:08:58,896 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:08:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:08:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 2 times [2020-07-21 11:08:58,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:08:58,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922572201] [2020-07-21 11:08:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:08:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:08:58,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 11:08:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:08:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 11:08:59,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:08:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 11:08:59,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922572201] [2020-07-21 11:08:59,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:08:59,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 11:08:59,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914232999] [2020-07-21 11:08:59,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 11:08:59,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:08:59,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 11:08:59,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:08:59,956 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 20 states. [2020-07-21 11:09:02,428 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 11:09:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:09:02,634 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-21 11:09:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 11:09:02,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-21 11:09:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:09:02,637 INFO L225 Difference]: With dead ends: 42 [2020-07-21 11:09:02,637 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 11:09:02,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:09:02,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 11:09:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 11:09:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 11:09:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 11:09:02,650 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-07-21 11:09:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:09:02,650 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 11:09:02,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 11:09:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 11:09:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 11:09:02,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:09:02,654 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:09:02,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:09:02,855 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:09:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:09:02,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 3 times [2020-07-21 11:09:02,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:09:02,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475073065] [2020-07-21 11:09:02,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:09:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:09:02,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 11:09:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:09:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 11:09:03,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:09:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 75 refuted. 2 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 11:09:09,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475073065] [2020-07-21 11:09:09,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:09:09,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-21 11:09:09,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822151242] [2020-07-21 11:09:09,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 11:09:09,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:09:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 11:09:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1074, Unknown=2, NotChecked=0, Total=1260 [2020-07-21 11:09:09,400 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 36 states. [2020-07-21 11:09:14,339 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-21 11:09:14,787 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 11:09:25,153 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 11:09:27,392 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-21 11:09:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:09:31,709 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-21 11:09:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 11:09:31,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2020-07-21 11:09:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:09:31,712 INFO L225 Difference]: With dead ends: 66 [2020-07-21 11:09:31,712 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 11:09:31,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=381, Invalid=1870, Unknown=5, NotChecked=0, Total=2256 [2020-07-21 11:09:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 11:09:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 11:09:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 11:09:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-21 11:09:31,728 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-07-21 11:09:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:09:31,729 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-21 11:09:31,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 11:09:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-21 11:09:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-21 11:09:31,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:09:31,733 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:09:31,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:09:31,935 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:09:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:09:31,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 4 times [2020-07-21 11:09:31,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:09:31,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876722053] [2020-07-21 11:09:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:09:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:09:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 11:09:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:09:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 11:09:32,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:10:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 333 refuted. 12 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 11:10:08,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876722053] [2020-07-21 11:10:08,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:10:08,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-21 11:10:08,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931018902] [2020-07-21 11:10:08,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-21 11:10:08,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:10:08,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-21 11:10:08,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3925, Unknown=15, NotChecked=0, Total=4556 [2020-07-21 11:10:08,864 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 68 states. [2020-07-21 11:10:15,463 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 13 [2020-07-21 11:10:22,099 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2020-07-21 11:10:30,574 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 73 DAG size of output: 13 [2020-07-21 11:10:37,337 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-21 11:10:41,392 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 68 DAG size of output: 13 [2020-07-21 11:10:47,737 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-21 11:10:51,728 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 13 [2020-07-21 11:11:00,850 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-21 11:11:06,676 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-21 11:11:14,965 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 11:11:17,306 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 13 [2020-07-21 11:11:21,254 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 11:11:25,172 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 13 [2020-07-21 11:11:29,348 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 11:11:31,997 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 13 [2020-07-21 11:11:38,857 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 11:11:51,007 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-21 11:11:55,019 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 11:12:09,198 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-07-21 11:12:31,467 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-21 11:12:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:12:33,942 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-07-21 11:12:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-21 11:12:33,944 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 103 [2020-07-21 11:12:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:12:33,948 INFO L225 Difference]: With dead ends: 114 [2020-07-21 11:12:33,948 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 11:12:33,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 178.8s TimeCoverageRelationStatistics Valid=1521, Invalid=7572, Unknown=27, NotChecked=0, Total=9120 [2020-07-21 11:12:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 11:12:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-21 11:12:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 11:12:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-21 11:12:33,967 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-07-21 11:12:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:12:33,968 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-21 11:12:33,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-21 11:12:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-21 11:12:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 11:12:33,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:12:33,972 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:12:34,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:12:34,185 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:12:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:12:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash -935230737, now seen corresponding path program 5 times [2020-07-21 11:12:34,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:12:34,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729820063] [2020-07-21 11:12:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:12:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:12:34,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-21 11:12:34,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:12:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-21 11:12:37,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:15:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1390 refuted. 67 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-21 11:15:04,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729820063] [2020-07-21 11:15:04,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:15:04,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-21 11:15:04,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263891142] [2020-07-21 11:15:04,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-21 11:15:04,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:15:04,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-21 11:15:04,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=14985, Unknown=59, NotChecked=0, Total=17292 [2020-07-21 11:15:04,318 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 132 states. [2020-07-21 11:15:48,798 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 158 DAG size of output: 13 [2020-07-21 11:16:47,564 WARN L193 SmtUtils]: Spent 7.44 s on a formula simplification. DAG size of input: 156 DAG size of output: 11 [2020-07-21 11:17:37,972 WARN L193 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 153 DAG size of output: 13 [2020-07-21 11:18:29,806 WARN L193 SmtUtils]: Spent 6.70 s on a formula simplification. DAG size of input: 151 DAG size of output: 11 [2020-07-21 11:19:22,810 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-21 11:20:12,345 WARN L193 SmtUtils]: Spent 3.64 s on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2020-07-21 11:20:54,756 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 143 DAG size of output: 13 [2020-07-21 11:20:56,786 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod |c_id_#res| 4294967296) 200) (< (mod (+ |c_id_#res| 11) 4294967296) 200) (< (mod (+ |c_id_#res| 6) 4294967296) 200) (< (mod (+ |c_id_#res| 24) 4294967296) 200) (< (mod (+ |c_id_#res| 16) 4294967296) 200) (< (mod (+ |c_id_#res| 4) 4294967296) 200) (< (mod (+ |c_id_#res| 12) 4294967296) 200) (< (mod (+ |c_id_#res| 13) 4294967296) 200) (< (mod (+ |c_id_#res| 9) 4294967296) 200) (< (mod (+ |c_id_#res| 5) 4294967296) 200) (< (mod (+ |c_id_#res| 8) 4294967296) 200) (< (mod (+ |c_id_#res| 17) 4294967296) 200) (< (mod (+ |c_id_#res| 20) 4294967296) 200) (< (mod (+ |c_id_#res| 10) 4294967296) 200) (< (mod (+ |c_id_#res| 25) 4294967296) 200) (< (mod (+ |c_id_#res| 21) 4294967296) 200) (< (mod (+ |c_id_#res| 3) 4294967296) 200) (< (mod (+ |c_id_#res| 1) 4294967296) 200) (< (mod (+ |c_id_#res| 26) 4294967296) 200) (< (mod (+ |c_id_#res| 27) 4294967296) 200) (< (mod (+ |c_id_#res| 14) 4294967296) 200) (< (mod (+ |c_id_#res| 15) 4294967296) 200) (< (mod (+ |c_id_#res| 19) 4294967296) 200) (< (mod (+ |c_id_#res| 23) 4294967296) 200) (< (mod (+ |c_id_#res| 22) 4294967296) 200) (< (mod (+ |c_id_#res| 2) 4294967296) 200) (< (mod (+ |c_id_#res| 7) 4294967296) 200) (< (mod (+ |c_id_#res| 18) 4294967296) 200)) is different from false [2020-07-21 11:21:41,705 WARN L193 SmtUtils]: Spent 5.48 s on a formula simplification. DAG size of input: 138 DAG size of output: 13 [2020-07-21 11:22:25,833 WARN L193 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 136 DAG size of output: 11 [2020-07-21 11:23:18,030 WARN L193 SmtUtils]: Spent 7.51 s on a formula simplification. DAG size of input: 133 DAG size of output: 13