/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/cggmp2005_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:51:19,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:51:19,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:51:19,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:51:19,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:51:19,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:51:19,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:51:19,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:51:19,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:51:19,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:51:19,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:51:19,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:51:19,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:51:19,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:51:19,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:51:19,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:51:19,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:51:19,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:51:19,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:51:19,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:51:19,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:51:19,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:51:19,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:51:19,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:51:19,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:51:19,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:51:19,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:51:19,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:51:19,887 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 11:51:19,904 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:51:19,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:51:19,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:51:19,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:51:19,907 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:51:19,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:51:19,908 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:51:19,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:51:19,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:51:19,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:51:19,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:51:19,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:51:19,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:51:19,909 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:51:19,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:51:19,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:51:19,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:51:19,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:51:19,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:51:19,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:51:19,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:51:19,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:51:19,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:51:19,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:51:19,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:51:19,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:51:19,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:19,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:51:19,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:51:19,912 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 11:51:20,277 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:51:20,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:51:20,302 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:51:20,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:51:20,305 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:51:20,306 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-21 11:51:20,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c86f44d8/59b6bf188dde4c92b0a39bba322c3904/FLAGdd94359b6 [2020-07-21 11:51:21,089 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:51:21,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-21 11:51:21,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c86f44d8/59b6bf188dde4c92b0a39bba322c3904/FLAGdd94359b6 [2020-07-21 11:51:21,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c86f44d8/59b6bf188dde4c92b0a39bba322c3904 [2020-07-21 11:51:21,392 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:51:21,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:51:21,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:51:21,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:51:21,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:51:21,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:51:21" (1/1) ... [2020-07-21 11:51:21,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f0dfff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21, skipping insertion in model container [2020-07-21 11:51:21,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:51:21" (1/1) ... [2020-07-21 11:51:21,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:51:21,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:51:21,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:51:21,677 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:51:21,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:51:21,721 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:51:21,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21 WrapperNode [2020-07-21 11:51:21,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:51:21,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:51:21,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:51:21,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:51:21,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21" (1/1) ... [2020-07-21 11:51:21,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21" (1/1) ... [2020-07-21 11:51:21,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21" (1/1) ... [2020-07-21 11:51:21,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21" (1/1) ... [2020-07-21 11:51:21,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21" (1/1) ... [2020-07-21 11:51:21,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21" (1/1) ... [2020-07-21 11:51:21,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21" (1/1) ... [2020-07-21 11:51:21,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:51:21,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:51:21,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:51:21,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:51:21,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21" (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 11:51:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:51:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:51:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:51:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:51:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:51:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:51:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:51:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:51:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:51:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:51:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:51:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:51:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:51:22,231 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:51:22,232 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:51:22,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:51:22 BoogieIcfgContainer [2020-07-21 11:51:22,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:51:22,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:51:22,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:51:22,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:51:22,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:51:21" (1/3) ... [2020-07-21 11:51:22,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8530c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:51:22, skipping insertion in model container [2020-07-21 11:51:22,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:21" (2/3) ... [2020-07-21 11:51:22,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8530c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:51:22, skipping insertion in model container [2020-07-21 11:51:22,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:51:22" (3/3) ... [2020-07-21 11:51:22,253 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i [2020-07-21 11:51:22,274 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:51:22,287 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:51:22,310 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:51:22,377 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:51:22,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:51:22,377 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:51:22,378 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:51:22,378 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:51:22,378 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:51:22,382 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:51:22,383 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:51:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 11:51:22,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:51:22,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:22,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:22,449 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:22,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-07-21 11:51:22,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:22,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054031728] [2020-07-21 11:51:22,487 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 11:51:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:22,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 11:51:22,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:22,606 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 11:51:22,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:51:22,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054031728] [2020-07-21 11:51:22,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:51:22,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:51:22,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448435608] [2020-07-21 11:51:22,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:51:22,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:22,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:51:22,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:51:22,632 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-21 11:51:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:22,693 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-07-21 11:51:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:51:22,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-21 11:51:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:22,704 INFO L225 Difference]: With dead ends: 32 [2020-07-21 11:51:22,704 INFO L226 Difference]: Without dead ends: 13 [2020-07-21 11:51:22,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:51:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-21 11:51:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-21 11:51:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-21 11:51:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-21 11:51:22,753 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-21 11:51:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:22,754 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-21 11:51:22,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:51:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-21 11:51:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 11:51:22,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:22,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:22,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:22,972 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:22,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-07-21 11:51:22,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:22,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647335794] [2020-07-21 11:51:22,975 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 11:51:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:51:23,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:23,193 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:51:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:23,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:51:23,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:51:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:23,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647335794] [2020-07-21 11:51:23,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:51:23,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 11:51:23,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160295908] [2020-07-21 11:51:23,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 11:51:23,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:23,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 11:51:23,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:51:23,463 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2020-07-21 11:51:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:23,637 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-21 11:51:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:51:23,638 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-07-21 11:51:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:23,639 INFO L225 Difference]: With dead ends: 19 [2020-07-21 11:51:23,639 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 11:51:23,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:51:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 11:51:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 11:51:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 11:51:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 11:51:23,649 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-21 11:51:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:23,650 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 11:51:23,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 11:51:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 11:51:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:51:23,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:23,652 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:23,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:23,865 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:23,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:23,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1105094223, now seen corresponding path program 2 times [2020-07-21 11:51:23,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:23,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258853590] [2020-07-21 11:51:23,867 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 11:51:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:23,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 11:51:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:23,992 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:51:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:24,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:51:24,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:51:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:24,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258853590] [2020-07-21 11:51:24,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:51:24,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 11:51:24,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125621058] [2020-07-21 11:51:24,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 11:51:24,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:24,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 11:51:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:51:24,239 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2020-07-21 11:51:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:24,726 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-21 11:51:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:51:24,727 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-07-21 11:51:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:24,728 INFO L225 Difference]: With dead ends: 23 [2020-07-21 11:51:24,729 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 11:51:24,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:51:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 11:51:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 11:51:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 11:51:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 11:51:24,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-21 11:51:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:24,744 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 11:51:24,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 11:51:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 11:51:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:51:24,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:24,746 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:24,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:24,962 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1866925900, now seen corresponding path program 3 times [2020-07-21 11:51:24,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:24,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551365154] [2020-07-21 11:51:24,966 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 11:51:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:25,023 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-21 11:51:25,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:25,159 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:51:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:25,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:51:25,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:51:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:25,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551365154] [2020-07-21 11:51:25,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:51:25,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-07-21 11:51:25,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375205495] [2020-07-21 11:51:25,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:51:25,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:25,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:51:25,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:51:25,533 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2020-07-21 11:51:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:26,415 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 11:51:26,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 11:51:26,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 16 [2020-07-21 11:51:26,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:26,419 INFO L225 Difference]: With dead ends: 29 [2020-07-21 11:51:26,419 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 11:51:26,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 11:51:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 11:51:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 11:51:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 11:51:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-21 11:51:26,443 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-21 11:51:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:26,444 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-21 11:51:26,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:51:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-21 11:51:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:51:26,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:26,450 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:26,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:26,666 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1577490540, now seen corresponding path program 4 times [2020-07-21 11:51:26,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:26,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405062385] [2020-07-21 11:51:26,668 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 11:51:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:26,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 74 conjunts are in the unsatisfiable core [2020-07-21 11:51:26,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:26,994 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:51:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:27,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:51:27,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:51:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:27,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405062385] [2020-07-21 11:51:27,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:51:27,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-07-21 11:51:27,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370383081] [2020-07-21 11:51:27,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 11:51:27,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:27,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 11:51:27,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2020-07-21 11:51:27,810 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 32 states. [2020-07-21 11:51:28,565 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 11:51:28,782 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-07-21 11:51:29,131 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-07-21 11:51:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:30,347 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 11:51:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 11:51:30,348 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 22 [2020-07-21 11:51:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:30,350 INFO L225 Difference]: With dead ends: 41 [2020-07-21 11:51:30,350 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 11:51:30,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=719, Invalid=2587, Unknown=0, NotChecked=0, Total=3306 [2020-07-21 11:51:30,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 11:51:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 11:51:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 11:51:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-21 11:51:30,364 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-21 11:51:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:30,364 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-21 11:51:30,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 11:51:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-21 11:51:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 11:51:30,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:30,366 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:30,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:30,569 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:30,570 INFO L82 PathProgramCache]: Analyzing trace with hash -718556500, now seen corresponding path program 5 times [2020-07-21 11:51:30,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:30,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457875834] [2020-07-21 11:51:30,572 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 11:51:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:30,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 146 conjunts are in the unsatisfiable core [2020-07-21 11:51:30,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:31,385 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:51:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:31,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:51:31,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:51:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:33,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457875834] [2020-07-21 11:51:33,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:51:33,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 55 [2020-07-21 11:51:33,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917674337] [2020-07-21 11:51:33,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-21 11:51:33,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-21 11:51:33,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=2329, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 11:51:33,520 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 55 states. [2020-07-21 11:51:35,311 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-21 11:51:35,837 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 108 [2020-07-21 11:51:36,277 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-21 11:51:36,668 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 98 [2020-07-21 11:51:37,121 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-21 11:51:37,583 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-21 11:51:37,980 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 11:51:38,350 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-21 11:51:38,714 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 11:51:39,045 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 11:51:39,389 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 11:51:39,716 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 11:51:40,042 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 11:51:40,327 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 11:51:40,634 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 11:51:41,191 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 11:51:43,679 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-07-21 11:51:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:43,695 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-21 11:51:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-21 11:51:43,698 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 34 [2020-07-21 11:51:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:43,700 INFO L225 Difference]: With dead ends: 65 [2020-07-21 11:51:43,700 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 11:51:43,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2548, Invalid=8372, Unknown=0, NotChecked=0, Total=10920 [2020-07-21 11:51:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 11:51:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 11:51:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 11:51:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-21 11:51:43,745 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-21 11:51:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:43,746 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-21 11:51:43,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-21 11:51:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-21 11:51:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 11:51:43,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:43,753 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:43,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:43,967 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:43,968 INFO L82 PathProgramCache]: Analyzing trace with hash 944097068, now seen corresponding path program 6 times [2020-07-21 11:51:43,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:43,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557096803] [2020-07-21 11:51:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 11:51:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:44,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 290 conjunts are in the unsatisfiable core [2020-07-21 11:51:44,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:46,869 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:51:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:47,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:51:47,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:51:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:55,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557096803] [2020-07-21 11:51:55,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:51:55,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 103 [2020-07-21 11:51:55,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536227398] [2020-07-21 11:51:55,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-21 11:51:55,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:55,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-21 11:51:55,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=8089, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 11:51:55,248 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 103 states. [2020-07-21 11:52:02,442 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2020-07-21 11:52:03,748 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 204 [2020-07-21 11:52:05,382 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-07-21 11:52:06,488 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 194 [2020-07-21 11:52:08,020 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-07-21 11:52:09,575 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-07-21 11:52:11,055 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2020-07-21 11:52:12,600 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-07-21 11:52:14,025 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2020-07-21 11:52:15,435 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2020-07-21 11:52:16,850 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-07-21 11:52:18,199 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-07-21 11:52:19,504 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-07-21 11:52:20,894 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-21 11:52:22,278 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-07-21 11:52:23,635 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-21 11:52:24,981 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-07-21 11:52:26,273 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-07-21 11:52:27,577 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-07-21 11:52:28,852 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-21 11:52:30,109 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-21 11:52:31,339 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-21 11:52:32,532 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 11:52:33,728 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 11:52:34,914 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-07-21 11:52:36,058 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-21 11:52:37,195 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-07-21 11:52:38,273 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-21 11:52:39,352 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-21 11:52:40,426 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-21 11:52:41,461 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 11:52:42,435 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-21 11:52:43,398 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 11:52:44,347 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 11:52:45,259 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 11:52:46,150 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 11:52:46,984 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 11:52:47,796 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 11:52:48,546 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 11:52:49,275 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 11:52:49,991 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 11:52:50,661 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 11:52:51,312 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:52:56,881 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-07-21 11:52:56,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:52:56,900 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2020-07-21 11:52:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 11:52:56,901 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 58 [2020-07-21 11:52:56,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:52:56,904 INFO L225 Difference]: With dead ends: 113 [2020-07-21 11:52:56,905 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 11:52:56,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5183 ImplicationChecksByTransitivity, 67.7s TimeCoverageRelationStatistics Valid=9676, Invalid=30524, Unknown=0, NotChecked=0, Total=40200 [2020-07-21 11:52:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 11:52:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-21 11:52:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 11:52:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-21 11:52:56,949 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-21 11:52:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:52:56,949 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-21 11:52:56,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-21 11:52:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-21 11:52:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 11:52:56,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:52:56,952 INFO L422 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:52:57,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:52:57,154 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:52:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:52:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash -679907284, now seen corresponding path program 7 times [2020-07-21 11:52:57,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:52:57,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084440159] [2020-07-21 11:52:57,156 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 [2020-07-21 11:52:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:52:57,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 578 conjunts are in the unsatisfiable core [2020-07-21 11:52:57,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:53:12,471 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:53:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:53:13,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:53:13,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:10,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084440159] [2020-07-21 11:54:10,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:10,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 199 [2020-07-21 11:54:10,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767219534] [2020-07-21 11:54:10,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 199 states [2020-07-21 11:54:10,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2020-07-21 11:54:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9425, Invalid=29977, Unknown=0, NotChecked=0, Total=39402 [2020-07-21 11:54:10,929 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 199 states. [2020-07-21 11:55:09,842 WARN L193 SmtUtils]: Spent 3.62 s on a formula simplification that was a NOOP. DAG size: 635 [2020-07-21 11:55:14,182 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 636 DAG size of output: 398 [2020-07-21 11:55:23,511 WARN L193 SmtUtils]: Spent 2.75 s on a formula simplification that was a NOOP. DAG size: 619 [2020-07-21 11:55:27,222 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 624 DAG size of output: 386 [2020-07-21 11:55:36,852 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification that was a NOOP. DAG size: 613 [2020-07-21 11:55:48,530 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification that was a NOOP. DAG size: 606 [2020-07-21 11:56:01,274 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification that was a NOOP. DAG size: 600 [2020-07-21 11:56:15,059 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification that was a NOOP. DAG size: 593 [2020-07-21 11:56:29,822 WARN L193 SmtUtils]: Spent 3.41 s on a formula simplification that was a NOOP. DAG size: 587 [2020-07-21 11:56:46,827 WARN L193 SmtUtils]: Spent 3.90 s on a formula simplification that was a NOOP. DAG size: 580 [2020-07-21 11:57:05,888 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 574 [2020-07-21 11:57:26,089 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 567 [2020-07-21 11:57:48,327 WARN L193 SmtUtils]: Spent 4.43 s on a formula simplification that was a NOOP. DAG size: 561 [2020-07-21 11:58:12,312 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification that was a NOOP. DAG size: 554 [2020-07-21 11:58:36,622 WARN L193 SmtUtils]: Spent 4.49 s on a formula simplification that was a NOOP. DAG size: 548 [2020-07-21 11:59:01,511 WARN L193 SmtUtils]: Spent 4.68 s on a formula simplification that was a NOOP. DAG size: 541 [2020-07-21 11:59:28,147 WARN L193 SmtUtils]: Spent 5.06 s on a formula simplification that was a NOOP. DAG size: 535 [2020-07-21 11:59:56,747 WARN L193 SmtUtils]: Spent 5.37 s on a formula simplification that was a NOOP. DAG size: 528 [2020-07-21 12:00:25,877 WARN L193 SmtUtils]: Spent 5.27 s on a formula simplification that was a NOOP. DAG size: 522 [2020-07-21 12:00:56,046 WARN L193 SmtUtils]: Spent 5.42 s on a formula simplification that was a NOOP. DAG size: 515 [2020-07-21 12:01:27,926 WARN L193 SmtUtils]: Spent 5.67 s on a formula simplification that was a NOOP. DAG size: 509 [2020-07-21 12:01:59,870 WARN L193 SmtUtils]: Spent 5.48 s on a formula simplification that was a NOOP. DAG size: 502 [2020-07-21 12:02:32,798 WARN L193 SmtUtils]: Spent 5.89 s on a formula simplification that was a NOOP. DAG size: 496 [2020-07-21 12:03:07,258 WARN L193 SmtUtils]: Spent 5.96 s on a formula simplification that was a NOOP. DAG size: 489 [2020-07-21 12:03:43,161 WARN L193 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 483 [2020-07-21 12:04:18,319 WARN L193 SmtUtils]: Spent 5.63 s on a formula simplification that was a NOOP. DAG size: 476 [2020-07-21 12:04:54,209 WARN L193 SmtUtils]: Spent 6.17 s on a formula simplification that was a NOOP. DAG size: 470 [2020-07-21 12:05:29,438 WARN L193 SmtUtils]: Spent 5.67 s on a formula simplification that was a NOOP. DAG size: 463