/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:38:13,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:38:13,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:38:13,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:38:13,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:38:13,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:38:13,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:38:13,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:38:13,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:38:13,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:38:13,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:38:13,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:38:13,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:38:13,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:38:13,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:38:13,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:38:13,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:38:13,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:38:13,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:38:13,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:38:13,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:38:13,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:38:13,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:38:13,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:38:13,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 19:38:13,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:38:13,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:38:13,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:38:13,700 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 19:38:13,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:38:13,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:38:13,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:38:13,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:38:13,745 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:38:13,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:38:13,745 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:38:13,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:38:13,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:38:13,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:38:13,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:38:13,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:38:13,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:38:13,748 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:38:13,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:38:13,748 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:38:13,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:38:13,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:38:13,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:38:13,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:38:13,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:38:13,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:38:13,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:38:13,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:38:13,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:38:13,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:38:13,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:38:13,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:38:13,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:38:13,751 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:38:14,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:38:14,053 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:38:14,056 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:38:14,058 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:38:14,058 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:38:14,059 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-18 19:38:14,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06d79797f/9b55b8d5120e49e2ba3556baeb0589f3/FLAGca23f8bbf [2020-08-18 19:38:14,569 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:38:14,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-18 19:38:14,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06d79797f/9b55b8d5120e49e2ba3556baeb0589f3/FLAGca23f8bbf [2020-08-18 19:38:14,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06d79797f/9b55b8d5120e49e2ba3556baeb0589f3 [2020-08-18 19:38:14,925 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:38:14,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:38:14,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:38:14,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:38:14,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:38:14,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:38:14" (1/1) ... [2020-08-18 19:38:14,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a37f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:14, skipping insertion in model container [2020-08-18 19:38:14,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:38:14" (1/1) ... [2020-08-18 19:38:14,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:38:15,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:38:15,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:38:15,424 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:38:15,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:38:15,541 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:38:15,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:15 WrapperNode [2020-08-18 19:38:15,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:38:15,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:38:15,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:38:15,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:38:15,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:15" (1/1) ... [2020-08-18 19:38:15,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:15" (1/1) ... [2020-08-18 19:38:15,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:15" (1/1) ... [2020-08-18 19:38:15,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:15" (1/1) ... [2020-08-18 19:38:15,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:15" (1/1) ... [2020-08-18 19:38:15,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:15" (1/1) ... [2020-08-18 19:38:15,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:15" (1/1) ... [2020-08-18 19:38:15,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:38:15,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:38:15,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:38:15,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:38:15,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 19:38:15,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:38:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:38:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:38:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:38:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-18 19:38:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-18 19:38:15,748 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:38:15,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 19:38:15,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 19:38:15,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 19:38:15,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 19:38:15,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 19:38:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 19:38:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:38:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:38:15,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 19:38:15,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 19:38:18,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:38:18,831 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 19:38:18,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:38:18 BoogieIcfgContainer [2020-08-18 19:38:18,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:38:18,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:38:18,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:38:18,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:38:18,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:38:14" (1/3) ... [2020-08-18 19:38:18,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81e0f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:38:18, skipping insertion in model container [2020-08-18 19:38:18,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:38:15" (2/3) ... [2020-08-18 19:38:18,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81e0f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:38:18, skipping insertion in model container [2020-08-18 19:38:18,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:38:18" (3/3) ... [2020-08-18 19:38:18,844 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-08-18 19:38:18,854 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:38:18,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:38:18,877 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:38:18,898 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:38:18,898 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:38:18,899 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:38:18,899 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:38:18,899 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:38:18,899 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:38:18,899 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:38:18,900 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:38:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-18 19:38:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 19:38:18,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:38:18,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:38:18,926 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:38:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:38:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-08-18 19:38:18,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:38:18,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084595194] [2020-08-18 19:38:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:38:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:20,057 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-18 19:38:20,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:38:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:38:20,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084595194] [2020-08-18 19:38:20,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:38:20,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-18 19:38:20,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749540270] [2020-08-18 19:38:20,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 19:38:20,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:38:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 19:38:20,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 19:38:20,127 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-08-18 19:38:20,423 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-18 19:38:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:38:41,499 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-08-18 19:38:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 19:38:41,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-18 19:38:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:38:41,527 INFO L225 Difference]: With dead ends: 92 [2020-08-18 19:38:41,528 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 19:38:41,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-18 19:38:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 19:38:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-18 19:38:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 19:38:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-08-18 19:38:41,590 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-08-18 19:38:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:38:41,591 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-08-18 19:38:41,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 19:38:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-08-18 19:38:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 19:38:41,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:38:41,594 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:38:41,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:38:41,594 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:38:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:38:41,595 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-08-18 19:38:41,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:38:41,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832200211] [2020-08-18 19:38:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:38:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:42,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:38:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:38:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:38:42,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832200211] [2020-08-18 19:38:42,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:38:42,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 19:38:42,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065931303] [2020-08-18 19:38:42,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 19:38:42,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:38:42,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 19:38:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-18 19:38:42,127 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 15 states. [2020-08-18 19:38:42,370 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-18 19:39:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:39:05,145 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-18 19:39:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 19:39:05,153 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-18 19:39:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:39:05,155 INFO L225 Difference]: With dead ends: 65 [2020-08-18 19:39:05,155 INFO L226 Difference]: Without dead ends: 62 [2020-08-18 19:39:05,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-18 19:39:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-18 19:39:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-08-18 19:39:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 19:39:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-18 19:39:05,165 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-08-18 19:39:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:39:05,166 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-18 19:39:05,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 19:39:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-18 19:39:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 19:39:05,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:39:05,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:39:05,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:39:05,168 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:39:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:39:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-08-18 19:39:05,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:39:05,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56831816] [2020-08-18 19:39:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:39:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:05,657 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-18 19:39:05,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:39:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:39:05,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56831816] [2020-08-18 19:39:05,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:39:05,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 19:39:05,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945985145] [2020-08-18 19:39:05,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 19:39:05,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:39:05,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 19:39:05,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-18 19:39:05,700 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2020-08-18 19:39:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:39:30,838 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-18 19:39:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 19:39:30,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-08-18 19:39:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:39:30,842 INFO L225 Difference]: With dead ends: 70 [2020-08-18 19:39:30,842 INFO L226 Difference]: Without dead ends: 67 [2020-08-18 19:39:30,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-08-18 19:39:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-18 19:39:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-08-18 19:39:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 19:39:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-08-18 19:39:30,852 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2020-08-18 19:39:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:39:30,852 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-08-18 19:39:30,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 19:39:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-08-18 19:39:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 19:39:30,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:39:30,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:39:30,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:39:30,855 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:39:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:39:30,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1809942103, now seen corresponding path program 3 times [2020-08-18 19:39:30,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:39:30,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237498937] [2020-08-18 19:39:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:39:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:31,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:39:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:39:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:39:31,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237498937] [2020-08-18 19:39:31,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:39:31,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 19:39:31,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759553933] [2020-08-18 19:39:31,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 19:39:31,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:39:31,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 19:39:31,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 19:39:31,363 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states.