/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/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:02:34,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:02:34,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:02:34,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:02:34,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:02:34,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:02:34,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:02:34,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:02:34,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:02:34,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:02:34,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:02:34,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:02:34,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:02:34,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:02:34,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:02:34,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:02:34,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:02:34,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:02:34,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:02:34,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:02:34,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:02:34,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:02:34,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:02:34,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:02:34,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:02:34,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:02:34,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:02:34,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:02:34,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 12:02:34,551 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:02:34,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:02:34,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:02:34,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:02:34,554 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:02:34,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:02:34,559 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:02:34,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:02:34,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:02:34,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:02:34,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:02:34,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:02:34,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:02:34,561 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:02:34,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:02:34,561 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:02:34,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:02:34,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:02:34,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:02:34,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:02:34,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:02:34,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:02:34,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:02:34,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:02:34,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:02:34,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:02:34,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:34,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:02:34,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:02:34,566 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 [2020-07-20 12:02:34,899 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:02:34,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:02:34,928 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:02:34,929 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:02:34,930 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:02:34,932 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-20 12:02:35,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6379dd079/3b372515e6ab4be2b852a1a54ef92745/FLAGb29a8cf7e [2020-07-20 12:02:35,598 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:02:35,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-20 12:02:35,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6379dd079/3b372515e6ab4be2b852a1a54ef92745/FLAGb29a8cf7e [2020-07-20 12:02:35,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6379dd079/3b372515e6ab4be2b852a1a54ef92745 [2020-07-20 12:02:35,914 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:02:35,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:02:35,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:02:35,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:02:35,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:02:35,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:02:35" (1/1) ... [2020-07-20 12:02:35,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43558964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:35, skipping insertion in model container [2020-07-20 12:02:35,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:02:35" (1/1) ... [2020-07-20 12:02:35,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:02:35,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:02:36,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:02:36,295 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:02:36,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:02:36,346 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:02:36,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:36 WrapperNode [2020-07-20 12:02:36,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:02:36,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:02:36,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:02:36,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:02:36,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:36" (1/1) ... [2020-07-20 12:02:36,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:36" (1/1) ... [2020-07-20 12:02:36,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:36" (1/1) ... [2020-07-20 12:02:36,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:36" (1/1) ... [2020-07-20 12:02:36,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:36" (1/1) ... [2020-07-20 12:02:36,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:36" (1/1) ... [2020-07-20 12:02:36,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:36" (1/1) ... [2020-07-20 12:02:36,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:02:36,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:02:36,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:02:36,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:02:36,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:02:36,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:02:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:02:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:02:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 12:02:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:02:36,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:02:36,634 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:02:36,636 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:02:36,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 12:02:36,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:02:36,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:02:36,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:02:36,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:02:37,060 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:02:37,060 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 12:02:37,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:02:37 BoogieIcfgContainer [2020-07-20 12:02:37,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:02:37,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:02:37,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:02:37,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:02:37,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:02:35" (1/3) ... [2020-07-20 12:02:37,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a1e5da6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:02:37, skipping insertion in model container [2020-07-20 12:02:37,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:36" (2/3) ... [2020-07-20 12:02:37,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a1e5da6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:02:37, skipping insertion in model container [2020-07-20 12:02:37,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:02:37" (3/3) ... [2020-07-20 12:02:37,078 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-07-20 12:02:37,091 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:02:37,101 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:02:37,119 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:02:37,149 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:02:37,150 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:02:37,150 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:02:37,150 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:02:37,150 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:02:37,150 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:02:37,151 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:02:37,151 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:02:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 12:02:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 12:02:37,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:37,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:37,186 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:37,193 INFO L82 PathProgramCache]: Analyzing trace with hash -917653371, now seen corresponding path program 1 times [2020-07-20 12:02:37,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:37,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380385201] [2020-07-20 12:02:37,205 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 [2020-07-20 12:02:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:37,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 12:02:37,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:37,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:02:37,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380385201] [2020-07-20 12:02:37,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:02:37,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 12:02:37,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886938266] [2020-07-20 12:02:37,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 12:02:37,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:37,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 12:02:37,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 12:02:37,344 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-20 12:02:37,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:37,377 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-20 12:02:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 12:02:37,379 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-20 12:02:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:37,389 INFO L225 Difference]: With dead ends: 35 [2020-07-20 12:02:37,390 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 12:02:37,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 12:02:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 12:02:37,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 12:02:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 12:02:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-20 12:02:37,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-07-20 12:02:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:37,435 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-20 12:02:37,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 12:02:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-20 12:02:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 12:02:37,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:37,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:37,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:37,653 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1750778295, now seen corresponding path program 1 times [2020-07-20 12:02:37,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:37,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688273446] [2020-07-20 12:02:37,655 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 [2020-07-20 12:02:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:37,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:02:37,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:37,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:02:37,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688273446] [2020-07-20 12:02:37,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:02:37,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:02:37,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483887090] [2020-07-20 12:02:37,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:02:37,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:37,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:02:37,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:02:37,728 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-20 12:02:37,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:37,745 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-07-20 12:02:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:02:37,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 12:02:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:37,748 INFO L225 Difference]: With dead ends: 24 [2020-07-20 12:02:37,748 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 12:02:37,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:02:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 12:02:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 12:02:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 12:02:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 12:02:37,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-07-20 12:02:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:37,756 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 12:02:37,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:02:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 12:02:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 12:02:37,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:37,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:37,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:37,967 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash -941431669, now seen corresponding path program 1 times [2020-07-20 12:02:37,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:37,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475568928] [2020-07-20 12:02:37,970 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 [2020-07-20 12:02:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:38,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 12:02:38,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:38,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:02:38,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475568928] [2020-07-20 12:02:38,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:02:38,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:02:38,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592778091] [2020-07-20 12:02:38,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:02:38,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:38,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:02:38,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:02:38,103 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 12:02:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:38,165 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-20 12:02:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:02:38,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 12:02:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:38,167 INFO L225 Difference]: With dead ends: 23 [2020-07-20 12:02:38,168 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 12:02:38,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 12:02:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 12:02:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 12:02:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 12:02:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-07-20 12:02:38,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-07-20 12:02:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:38,176 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-07-20 12:02:38,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:02:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-07-20 12:02:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 12:02:38,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:38,177 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:38,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:38,379 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:38,380 INFO L82 PathProgramCache]: Analyzing trace with hash 447870728, now seen corresponding path program 1 times [2020-07-20 12:02:38,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:38,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403591169] [2020-07-20 12:02:38,382 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 [2020-07-20 12:02:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:38,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:02:38,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:38,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:02:38,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403591169] [2020-07-20 12:02:38,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:02:38,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:02:38,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256919542] [2020-07-20 12:02:38,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:02:38,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:38,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:02:38,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:02:38,471 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-07-20 12:02:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:38,509 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-20 12:02:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:02:38,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-20 12:02:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:38,512 INFO L225 Difference]: With dead ends: 31 [2020-07-20 12:02:38,512 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 12:02:38,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:02:38,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 12:02:38,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-07-20 12:02:38,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 12:02:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 12:02:38,520 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-07-20 12:02:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:38,520 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 12:02:38,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:02:38,521 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 12:02:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 12:02:38,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:38,522 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:38,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:38,737 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1257217354, now seen corresponding path program 1 times [2020-07-20 12:02:38,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:38,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124195916] [2020-07-20 12:02:38,738 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 [2020-07-20 12:02:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:38,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 12:02:38,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:38,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:38,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:02:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:39,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124195916] [2020-07-20 12:02:39,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:02:39,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 12:02:39,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112856513] [2020-07-20 12:02:39,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 12:02:39,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:39,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 12:02:39,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-20 12:02:39,032 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-07-20 12:02:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:39,173 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-20 12:02:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 12:02:39,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-07-20 12:02:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:39,176 INFO L225 Difference]: With dead ends: 26 [2020-07-20 12:02:39,176 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 12:02:39,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-20 12:02:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 12:02:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 12:02:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 12:02:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-20 12:02:39,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-07-20 12:02:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:39,186 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-20 12:02:39,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 12:02:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-20 12:02:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 12:02:39,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:39,191 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:39,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:39,406 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2145316375, now seen corresponding path program 1 times [2020-07-20 12:02:39,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:39,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199184434] [2020-07-20 12:02:39,409 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 [2020-07-20 12:02:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:39,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 12:02:39,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:39,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:39,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:02:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:39,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199184434] [2020-07-20 12:02:39,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:02:39,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 12:02:39,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214324830] [2020-07-20 12:02:39,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 12:02:39,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:39,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 12:02:39,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-07-20 12:02:39,805 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2020-07-20 12:02:44,108 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-20 12:02:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:58,769 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-07-20 12:02:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 12:02:58,772 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-07-20 12:02:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:58,773 INFO L225 Difference]: With dead ends: 43 [2020-07-20 12:02:58,773 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 12:02:58,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=67, Invalid=273, Unknown=2, NotChecked=0, Total=342 [2020-07-20 12:02:58,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 12:02:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 12:02:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 12:02:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-20 12:02:58,780 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2020-07-20 12:02:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:58,780 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-20 12:02:58,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 12:02:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-20 12:02:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 12:02:58,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:58,782 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:58,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:58,983 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1504484118, now seen corresponding path program 2 times [2020-07-20 12:02:58,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:58,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399230329] [2020-07-20 12:02:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:02:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:02:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 12:02:59,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 12:02:59,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399230329] [2020-07-20 12:02:59,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 12:02:59,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-07-20 12:02:59,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360499222] [2020-07-20 12:02:59,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:02:59,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:59,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:02:59,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 12:02:59,103 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2020-07-20 12:02:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:59,116 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-07-20 12:02:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:02:59,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 12:02:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:59,118 INFO L225 Difference]: With dead ends: 40 [2020-07-20 12:02:59,118 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 12:02:59,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 12:02:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 12:02:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 12:02:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 12:02:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-07-20 12:02:59,125 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 22 [2020-07-20 12:02:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:59,125 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-07-20 12:02:59,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:02:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-07-20 12:02:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 12:02:59,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:59,127 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:59,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:59,339 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1422910986, now seen corresponding path program 2 times [2020-07-20 12:02:59,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:59,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911760536] [2020-07-20 12:02:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:59,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 12:02:59,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:59,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:59,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:03:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:03:02,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911760536] [2020-07-20 12:03:02,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:03:02,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2020-07-20 12:03:02,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213893172] [2020-07-20 12:03:02,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 12:03:02,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:03:02,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 12:03:02,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=544, Unknown=1, NotChecked=0, Total=650 [2020-07-20 12:03:02,876 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-07-20 12:03:11,531 WARN L193 SmtUtils]: Spent 8.28 s on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-07-20 12:03:28,734 WARN L193 SmtUtils]: Spent 12.29 s on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 12:03:43,301 WARN L193 SmtUtils]: Spent 10.17 s on a formula simplification that was a NOOP. DAG size: 53 [2020-07-20 12:04:04,143 WARN L193 SmtUtils]: Spent 8.17 s on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 12:04:28,839 WARN L193 SmtUtils]: Spent 8.16 s on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 12:04:57,913 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 12:05:24,936 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 12:06:52,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:06:52,024 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-07-20 12:06:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 12:06:52,027 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-07-20 12:06:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:06:52,034 INFO L225 Difference]: With dead ends: 63 [2020-07-20 12:06:52,036 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 12:06:52,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 139.2s TimeCoverageRelationStatistics Valid=226, Invalid=1069, Unknown=37, NotChecked=0, Total=1332 [2020-07-20 12:06:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 12:06:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-20 12:06:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 12:06:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-07-20 12:06:52,059 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 28 [2020-07-20 12:06:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:06:52,063 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-07-20 12:06:52,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 12:06:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-07-20 12:06:52,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 12:06:52,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:06:52,067 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:06:52,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:06:52,269 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:06:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:06:52,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1188694230, now seen corresponding path program 3 times [2020-07-20 12:06:52,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:06:52,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818940366] [2020-07-20 12:06:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:06:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:06:52,347 WARN L261 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-20 12:06:52,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:06:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:06:53,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:06:53,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:07:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 186 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:07:38,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818940366] [2020-07-20 12:07:38,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:07:38,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 50 [2020-07-20 12:07:38,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667454874] [2020-07-20 12:07:38,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 12:07:38,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:07:38,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 12:07:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2088, Unknown=17, NotChecked=0, Total=2450 [2020-07-20 12:07:38,049 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 50 states. [2020-07-20 12:07:40,524 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 122 DAG size of output: 19 [2020-07-20 12:07:43,370 WARN L193 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 127 DAG size of output: 18 [2020-07-20 12:07:45,457 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289) 14) 4294967296) (mod (+ c_main_~a~0 7) 4294967296)) (= (mod (+ c_main_~a~0 4) 4294967296) (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292) 8) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ (* c_main_~j~0 9) c_main_~b~0 (* c_main_~i~0 4294967287) 18) 4294967296) (mod (+ c_main_~a~0 9) 4294967296)) (= (mod (+ (* c_main_~j~0 8) c_main_~b~0 (* c_main_~i~0 4294967288) 16) 4294967296) (mod (+ c_main_~a~0 8) 4294967296)) (= (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290) 12) 4294967296) (mod (+ c_main_~a~0 6) 4294967296)) (= (mod (+ c_main_~a~0 3) 4294967296) (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293) 6) 4294967296)) (= (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294) 4) 4294967296) (mod (+ c_main_~a~0 2) 4294967296)) (= (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291) 10) 4294967296) (mod (+ c_main_~a~0 5) 4294967296)) (= (mod (+ c_main_~a~0 10) 4294967296) (mod (+ (* c_main_~j~0 10) c_main_~b~0 (* c_main_~i~0 4294967286) 20) 4294967296)) (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295) 2) 4294967296))) is different from false [2020-07-20 12:07:47,472 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289)) 4294967296) (mod (+ c_main_~a~0 7) 4294967296)) (= (mod (+ c_main_~a~0 4) 4294967296) (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296)) (= (mod (+ (* c_main_~j~0 10) c_main_~b~0 (* c_main_~i~0 4294967286)) 4294967296) (mod (+ c_main_~a~0 10) 4294967296)) (= (mod (+ (* c_main_~j~0 9) c_main_~b~0 (* c_main_~i~0 4294967287)) 4294967296) (mod (+ c_main_~a~0 9) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290)) 4294967296) (mod (+ c_main_~a~0 6) 4294967296)) (= (mod (+ c_main_~a~0 3) 4294967296) (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296)) (= (mod (+ (* c_main_~j~0 8) c_main_~b~0 (* c_main_~i~0 4294967288)) 4294967296) (mod (+ c_main_~a~0 8) 4294967296)) (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291)) 4294967296)) (= (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296) (mod (+ c_main_~a~0 2) 4294967296))) is different from false [2020-07-20 12:08:47,230 WARN L193 SmtUtils]: Spent 30.47 s on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 12:08:53,322 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289)) 4294967296) (mod (+ c_main_~a~0 7) 4294967296)) (= (mod (+ c_main_~a~0 4) 4294967296) (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296)) (= (mod (+ (* c_main_~j~0 9) c_main_~b~0 (* c_main_~i~0 4294967287)) 4294967296) (mod (+ c_main_~a~0 9) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290)) 4294967296) (mod (+ c_main_~a~0 6) 4294967296)) (= (mod (+ c_main_~a~0 3) 4294967296) (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296)) (= (mod (+ (* c_main_~j~0 8) c_main_~b~0 (* c_main_~i~0 4294967288)) 4294967296) (mod (+ c_main_~a~0 8) 4294967296)) (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291)) 4294967296)) (= (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296) (mod (+ c_main_~a~0 2) 4294967296))) is different from false [2020-07-20 12:09:53,160 WARN L193 SmtUtils]: Spent 25.36 s on a formula simplification that was a NOOP. DAG size: 101 [2020-07-20 12:11:15,980 WARN L193 SmtUtils]: Spent 32.24 s on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 12:12:33,603 WARN L193 SmtUtils]: Spent 19.25 s on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 12:13:41,924 WARN L193 SmtUtils]: Spent 21.42 s on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 12:15:04,347 WARN L193 SmtUtils]: Spent 23.13 s on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 12:16:18,259 WARN L193 SmtUtils]: Spent 21.12 s on a formula simplification that was a NOOP. DAG size: 75