/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-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:40:37,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:40:37,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:40:37,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:40:37,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:40:37,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:40:37,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:40:37,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:40:37,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:40:37,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:40:37,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:40:37,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:40:37,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:40:37,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:40:37,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:40:37,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:40:37,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:40:37,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:40:37,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:40:37,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:40:37,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:40:37,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:40:37,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:40:37,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:40:37,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:40:37,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:40:37,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:40:37,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:40:37,429 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 11:40:37,446 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:40:37,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:40:37,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:40:37,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:40:37,448 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:40:37,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:40:37,449 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:40:37,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:40:37,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:40:37,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:40:37,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:40:37,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:40:37,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:40:37,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:40:37,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:40:37,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:40:37,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:40:37,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:40:37,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:40:37,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:40:37,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:40:37,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:40:37,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:40:37,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:40:37,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:40:37,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:40:37,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:37,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:40:37,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:40:37,454 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 11:40:37,845 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:40:37,866 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:40:37,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:40:37,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:40:37,873 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:40:37,874 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-07-21 11:40:37,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ec3d1962/74869328e73b4d72a6d5d0cae9d68b17/FLAGbfccb4a81 [2020-07-21 11:40:38,612 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:40:38,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-07-21 11:40:38,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ec3d1962/74869328e73b4d72a6d5d0cae9d68b17/FLAGbfccb4a81 [2020-07-21 11:40:38,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ec3d1962/74869328e73b4d72a6d5d0cae9d68b17 [2020-07-21 11:40:38,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:40:38,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:40:38,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:38,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:40:38,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:40:38,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:38" (1/1) ... [2020-07-21 11:40:38,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2dfea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:38, skipping insertion in model container [2020-07-21 11:40:38,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:38" (1/1) ... [2020-07-21 11:40:38,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:40:39,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:40:39,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:40:39,270 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:40:39,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:40:39,310 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:40:39,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:39 WrapperNode [2020-07-21 11:40:39,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:39,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:40:39,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:40:39,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:40:39,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:39" (1/1) ... [2020-07-21 11:40:39,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:39" (1/1) ... [2020-07-21 11:40:39,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:39" (1/1) ... [2020-07-21 11:40:39,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:39" (1/1) ... [2020-07-21 11:40:39,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:39" (1/1) ... [2020-07-21 11:40:39,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:39" (1/1) ... [2020-07-21 11:40:39,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:39" (1/1) ... [2020-07-21 11:40:39,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:40:39,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:40:39,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:40:39,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:40:39,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:39" (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 11:40:39,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:40:39,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:40:39,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:40:39,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:40:39,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:40:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:40:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:40:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:40:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:40:39,759 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:40:39,759 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:40:39,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:39 BoogieIcfgContainer [2020-07-21 11:40:39,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:40:39,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:40:39,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:40:39,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:40:39,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:40:38" (1/3) ... [2020-07-21 11:40:39,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e391ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:39, skipping insertion in model container [2020-07-21 11:40:39,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:39" (2/3) ... [2020-07-21 11:40:39,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e391ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:39, skipping insertion in model container [2020-07-21 11:40:39,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:39" (3/3) ... [2020-07-21 11:40:39,779 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-07-21 11:40:39,793 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:40:39,801 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:40:39,815 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:40:39,839 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:40:39,839 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:40:39,840 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:40:39,840 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:40:39,840 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:40:39,840 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:40:39,840 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:40:39,841 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:40:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 11:40:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 11:40:39,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:39,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:39,869 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:39,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-21 11:40:39,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:39,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887598397] [2020-07-21 11:40:39,888 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 11:40:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:39,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:40:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:40,031 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 11:40:40,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:40,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887598397] [2020-07-21 11:40:40,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:40,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:40:40,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016473246] [2020-07-21 11:40:40,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:40:40,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:40,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:40:40,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:40:40,118 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-21 11:40:40,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:40,171 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 11:40:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:40:40,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 11:40:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:40,182 INFO L225 Difference]: With dead ends: 29 [2020-07-21 11:40:40,183 INFO L226 Difference]: Without dead ends: 12 [2020-07-21 11:40:40,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:40:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-21 11:40:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-21 11:40:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-21 11:40:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-21 11:40:40,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-21 11:40:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:40,234 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-21 11:40:40,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:40:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-21 11:40:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:40:40,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:40,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:40,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:40,450 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:40,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-21 11:40:40,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:40,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233190802] [2020-07-21 11:40:40,453 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 11:40:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:40,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:40:40,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:40,520 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 11:40:40,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:40,579 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 11:40:40,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233190802] [2020-07-21 11:40:40,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:40,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 11:40:40,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859180008] [2020-07-21 11:40:40,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:40:40,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:40,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:40:40,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:40:40,585 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-07-21 11:40:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:40,687 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 11:40:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:40:40,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 11:40:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:40,690 INFO L225 Difference]: With dead ends: 20 [2020-07-21 11:40:40,690 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 11:40:40,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:40:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 11:40:40,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 11:40:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 11:40:40,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 11:40:40,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-21 11:40:40,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:40,698 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 11:40:40,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:40:40,698 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 11:40:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:40:40,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:40,699 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:40,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:40,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2020-07-21 11:40:40,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:40,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342568702] [2020-07-21 11:40:40,908 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 11:40:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 11:40:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:41,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:43,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342568702] [2020-07-21 11:40:43,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:43,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 11:40:43,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396345667] [2020-07-21 11:40:43,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 11:40:43,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:43,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 11:40:43,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=85, Unknown=1, NotChecked=0, Total=132 [2020-07-21 11:40:43,297 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-21 11:40:45,573 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 11:40:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:45,896 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-07-21 11:40:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:40:45,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-21 11:40:45,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:45,899 INFO L225 Difference]: With dead ends: 26 [2020-07-21 11:40:45,900 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 11:40:45,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=94, Invalid=145, Unknown=1, NotChecked=0, Total=240 [2020-07-21 11:40:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 11:40:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 11:40:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 11:40:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-21 11:40:45,920 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2020-07-21 11:40:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:45,920 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-21 11:40:45,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 11:40:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-21 11:40:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:40:45,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:45,924 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:46,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:46,135 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:46,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:46,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1348629730, now seen corresponding path program 3 times [2020-07-21 11:40:46,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:46,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072386937] [2020-07-21 11:40:46,138 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 11:40:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:46,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 11:40:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:46,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 54 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:51,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072386937] [2020-07-21 11:40:51,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:51,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 11:40:51,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078142415] [2020-07-21 11:40:51,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 11:40:51,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:51,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 11:40:51,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=384, Unknown=2, NotChecked=0, Total=552 [2020-07-21 11:40:51,132 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 24 states. [2020-07-21 11:40:51,777 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 11:40:52,360 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 11:40:52,890 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 11:40:53,395 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 11:40:58,059 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 11:41:00,796 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 11:41:05,961 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2020-07-21 11:41:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:41:10,399 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-21 11:41:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 11:41:10,399 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2020-07-21 11:41:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:41:10,401 INFO L225 Difference]: With dead ends: 38 [2020-07-21 11:41:10,401 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 11:41:10,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=404, Invalid=714, Unknown=4, NotChecked=0, Total=1122 [2020-07-21 11:41:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 11:41:10,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 11:41:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 11:41:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-07-21 11:41:10,410 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2020-07-21 11:41:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:41:10,410 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-07-21 11:41:10,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 11:41:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-07-21 11:41:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 11:41:10,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:10,412 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:10,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:10,614 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:10,615 INFO L82 PathProgramCache]: Analyzing trace with hash 144400734, now seen corresponding path program 4 times [2020-07-21 11:41:10,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:10,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35640588] [2020-07-21 11:41:10,617 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 11:41:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:10,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 11:41:10,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:41:11,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:41:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 245 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:41:33,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35640588] [2020-07-21 11:41:33,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:41:33,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 11:41:33,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709002890] [2020-07-21 11:41:33,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 11:41:33,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:33,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 11:41:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1624, Unknown=10, NotChecked=0, Total=2256 [2020-07-21 11:41:33,577 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 48 states. [2020-07-21 11:41:37,134 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2020-07-21 11:41:42,987 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 111 DAG size of output: 11 [2020-07-21 11:41:47,177 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 106 DAG size of output: 11 [2020-07-21 11:41:59,789 WARN L193 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 101 DAG size of output: 11 [2020-07-21 11:42:06,408 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 11 [2020-07-21 11:42:16,219 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2020-07-21 11:42:23,642 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 86 DAG size of output: 11 [2020-07-21 11:42:33,229 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 11 [2020-07-21 11:42:41,018 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2020-07-21 11:42:55,849 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-21 11:43:06,731 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-21 11:43:14,740 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-21 11:43:22,682 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 11:43:31,164 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 11:43:40,835 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 11:43:48,539 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 11:44:03,507 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 11:44:21,344 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-21 11:44:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:44:28,536 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-21 11:44:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-21 11:44:28,538 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 32 [2020-07-21 11:44:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:44:28,539 INFO L225 Difference]: With dead ends: 62 [2020-07-21 11:44:28,540 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 11:44:28,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 197.1s TimeCoverageRelationStatistics Valid=1673, Invalid=3134, Unknown=23, NotChecked=0, Total=4830 [2020-07-21 11:44:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 11:44:28,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 11:44:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 11:44:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-07-21 11:44:28,553 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2020-07-21 11:44:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:44:28,554 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-07-21 11:44:28,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 11:44:28,554 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-07-21 11:44:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 11:44:28,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:44:28,556 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:44:28,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:44:28,767 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:44:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:44:28,768 INFO L82 PathProgramCache]: Analyzing trace with hash -726077986, now seen corresponding path program 5 times [2020-07-21 11:44:28,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:44:28,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910120932] [2020-07-21 11:44:28,769 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 11:44:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:44:28,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-21 11:44:28,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:44:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:44:30,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:46:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1044 refuted. 37 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:46:31,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910120932] [2020-07-21 11:46:31,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:46:31,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-21 11:46:31,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741814700] [2020-07-21 11:46:31,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-21 11:46:31,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:46:31,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-21 11:46:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6667, Unknown=55, NotChecked=0, Total=9120 [2020-07-21 11:46:31,348 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 96 states. [2020-07-21 11:46:53,465 WARN L193 SmtUtils]: Spent 12.42 s on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2020-07-21 11:46:55,531 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~y~0 8) 4294967296) 1024) (< (mod (+ c_main_~y~0 11) 4294967296) 1024) (< (mod (+ c_main_~y~0 25) 4294967296) 1024) (< (mod (+ c_main_~y~0 33) 4294967296) 1024) (< (mod (+ c_main_~y~0 36) 4294967296) 1024) (< (mod (+ c_main_~y~0 41) 4294967296) 1024) (< (mod (+ c_main_~y~0 35) 4294967296) 1024) (< (mod (+ c_main_~y~0 15) 4294967296) 1024) (< (mod (+ c_main_~y~0 7) 4294967296) 1024) (< (mod (+ c_main_~y~0 16) 4294967296) 1024) (< (mod (+ c_main_~y~0 5) 4294967296) 1024) (< (mod c_main_~y~0 4294967296) 1024) (< (mod (+ c_main_~y~0 24) 4294967296) 1024) (< (mod (+ c_main_~y~0 18) 4294967296) 1024) (< (mod (+ c_main_~y~0 40) 4294967296) 1024) (< (mod (+ c_main_~y~0 39) 4294967296) 1024) (< (mod (+ c_main_~y~0 23) 4294967296) 1024) (< (mod (+ c_main_~y~0 45) 4294967296) 1024) (< (mod (+ c_main_~y~0 13) 4294967296) 1024) (< (mod (+ c_main_~y~0 3) 4294967296) 1024) (< (mod (+ c_main_~y~0 22) 4294967296) 1024) (< (mod (+ c_main_~y~0 28) 4294967296) 1024) (< (mod (+ c_main_~y~0 19) 4294967296) 1024) (< (mod (+ c_main_~y~0 32) 4294967296) 1024) (< (mod (+ c_main_~y~0 14) 4294967296) 1024) (< (mod (+ c_main_~y~0 34) 4294967296) 1024) (< (mod (+ c_main_~y~0 37) 4294967296) 1024) (< (mod (+ c_main_~y~0 30) 4294967296) 1024) (< (mod (+ c_main_~y~0 38) 4294967296) 1024) (< (mod (+ c_main_~y~0 29) 4294967296) 1024) (< (mod (+ c_main_~y~0 6) 4294967296) 1024) (< (mod (+ c_main_~y~0 10) 4294967296) 1024) (< (mod (+ c_main_~y~0 42) 4294967296) 1024) (< (mod (+ c_main_~y~0 26) 4294967296) 1024) (< (mod (+ c_main_~y~0 44) 4294967296) 1024) (< (mod (+ c_main_~y~0 2) 4294967296) 1024) (< (mod (+ c_main_~y~0 27) 4294967296) 1024) (< (mod (+ c_main_~y~0 21) 4294967296) 1024) (< (mod (+ c_main_~y~0 31) 4294967296) 1024) (< (mod (+ c_main_~y~0 20) 4294967296) 1024) (< (mod (+ c_main_~y~0 12) 4294967296) 1024) (< (mod (+ c_main_~y~0 1) 4294967296) 1024) (< (mod (+ c_main_~y~0 4) 4294967296) 1024) (< (mod (+ c_main_~y~0 9) 4294967296) 1024) (< (mod (+ c_main_~y~0 17) 4294967296) 1024) (< (mod (+ c_main_~y~0 43) 4294967296) 1024)) is different from false [2020-07-21 11:47:22,024 WARN L193 SmtUtils]: Spent 13.08 s on a formula simplification. DAG size of input: 226 DAG size of output: 11 [2020-07-21 11:47:52,895 WARN L193 SmtUtils]: Spent 11.71 s on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2020-07-21 11:48:29,357 WARN L193 SmtUtils]: Spent 12.89 s on a formula simplification. DAG size of input: 216 DAG size of output: 11 [2020-07-21 11:49:03,487 WARN L193 SmtUtils]: Spent 3.93 s on a formula simplification. DAG size of input: 211 DAG size of output: 11 [2020-07-21 11:49:26,783 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2020-07-21 11:50:04,119 WARN L193 SmtUtils]: Spent 9.79 s on a formula simplification. DAG size of input: 201 DAG size of output: 11 [2020-07-21 11:50:41,020 WARN L193 SmtUtils]: Spent 6.86 s on a formula simplification. DAG size of input: 196 DAG size of output: 11 [2020-07-21 11:51:25,316 WARN L193 SmtUtils]: Spent 8.67 s on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2020-07-21 11:52:11,729 WARN L193 SmtUtils]: Spent 14.11 s on a formula simplification. DAG size of input: 186 DAG size of output: 11 [2020-07-21 11:52:55,915 WARN L193 SmtUtils]: Spent 12.10 s on a formula simplification. DAG size of input: 181 DAG size of output: 11 [2020-07-21 11:53:48,390 WARN L193 SmtUtils]: Spent 8.04 s on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2020-07-21 11:54:35,546 WARN L193 SmtUtils]: Spent 7.61 s on a formula simplification. DAG size of input: 171 DAG size of output: 11