/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:24:13,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:24:13,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:24:13,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:24:13,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:24:13,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:24:13,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:24:13,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:24:13,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:24:13,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:24:13,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:24:13,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:24:13,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:24:13,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:24:13,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:24:13,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:24:13,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:24:13,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:24:13,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:24:13,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:24:13,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:24:13,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:24:13,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:24:13,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:24:13,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 04:24:13,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:24:13,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:24:13,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:24:13,842 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 [2020-08-19 04:24:13,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:24:13,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:24:13,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:24:13,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:24:13,866 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:24:13,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:24:13,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:24:13,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:24:13,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:24:13,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:24:13,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:24:13,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:24:13,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:24:13,868 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:24:13,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:24:13,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:24:13,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:24:13,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:24:13,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:24:13,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:24:13,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:24:13,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:24:13,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:24:13,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:24:13,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:24:13,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:24:13,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:24:13,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:24:13,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:24:13,872 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=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:24:14,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:24:14,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:24:14,199 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:24:14,202 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:24:14,203 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:24:14,204 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-19 04:24:14,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e29ffed63/f483679b706c474da253caab17655e83/FLAGee856255c [2020-08-19 04:24:14,758 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:24:14,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-19 04:24:14,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e29ffed63/f483679b706c474da253caab17655e83/FLAGee856255c [2020-08-19 04:24:15,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e29ffed63/f483679b706c474da253caab17655e83 [2020-08-19 04:24:15,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:24:15,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:24:15,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:24:15,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:24:15,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:24:15,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:24:15" (1/1) ... [2020-08-19 04:24:15,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acd657e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15, skipping insertion in model container [2020-08-19 04:24:15,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:24:15" (1/1) ... [2020-08-19 04:24:15,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:24:15,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:24:15,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:24:15,409 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:24:15,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:24:15,446 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:24:15,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15 WrapperNode [2020-08-19 04:24:15,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:24:15,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:24:15,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:24:15,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:24:15,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15" (1/1) ... [2020-08-19 04:24:15,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15" (1/1) ... [2020-08-19 04:24:15,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15" (1/1) ... [2020-08-19 04:24:15,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15" (1/1) ... [2020-08-19 04:24:15,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15" (1/1) ... [2020-08-19 04:24:15,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15" (1/1) ... [2020-08-19 04:24:15,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15" (1/1) ... [2020-08-19 04:24:15,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:24:15,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:24:15,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:24:15,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:24:15,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15" (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 [2020-08-19 04:24:15,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:24:15,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:24:15,620 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-19 04:24:15,620 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:24:15,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:24:15,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:24:15,621 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-19 04:24:15,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 04:24:15,621 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:24:15,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 04:24:15,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 04:24:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 04:24:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:24:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:24:15,869 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:24:15,870 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 04:24:15,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:24:15 BoogieIcfgContainer [2020-08-19 04:24:15,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:24:15,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:24:15,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:24:15,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:24:15,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:24:15" (1/3) ... [2020-08-19 04:24:15,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f9392e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:24:15, skipping insertion in model container [2020-08-19 04:24:15,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:24:15" (2/3) ... [2020-08-19 04:24:15,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f9392e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:24:15, skipping insertion in model container [2020-08-19 04:24:15,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:24:15" (3/3) ... [2020-08-19 04:24:15,885 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-08-19 04:24:15,898 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:24:15,905 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:24:15,921 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:24:15,951 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:24:15,951 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:24:15,951 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:24:15,952 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:24:15,952 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:24:15,952 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:24:15,952 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:24:15,952 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:24:15,972 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-19 04:24:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 04:24:15,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:15,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:15,981 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:15,995 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-08-19 04:24:16,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:16,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233500595] [2020-08-19 04:24:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 04:24:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:16,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233500595] [2020-08-19 04:24:16,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:24:16,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:24:16,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754247397] [2020-08-19 04:24:16,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:24:16,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:16,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:24:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:24:16,228 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-19 04:24:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:16,355 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-19 04:24:16,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:24:16,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 04:24:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:16,369 INFO L225 Difference]: With dead ends: 42 [2020-08-19 04:24:16,370 INFO L226 Difference]: Without dead ends: 20 [2020-08-19 04:24:16,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:24:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-19 04:24:16,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-19 04:24:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-19 04:24:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-19 04:24:16,415 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-08-19 04:24:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:16,415 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-19 04:24:16,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:24:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-19 04:24:16,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 04:24:16,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:16,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:16,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:24:16,418 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-08-19 04:24:16,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:16,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490600703] [2020-08-19 04:24:16,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-19 04:24:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:16,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490600703] [2020-08-19 04:24:16,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:24:16,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 04:24:16,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548740312] [2020-08-19 04:24:16,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 04:24:16,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:16,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 04:24:16,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:24:16,526 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-08-19 04:24:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:16,585 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-08-19 04:24:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 04:24:16,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-19 04:24:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:16,587 INFO L225 Difference]: With dead ends: 34 [2020-08-19 04:24:16,588 INFO L226 Difference]: Without dead ends: 22 [2020-08-19 04:24:16,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:24:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-19 04:24:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-19 04:24:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 04:24:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 04:24:16,597 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-08-19 04:24:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:16,597 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 04:24:16,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 04:24:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 04:24:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:24:16,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:16,599 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] [2020-08-19 04:24:16,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:24:16,599 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:16,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-08-19 04:24:16,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:16,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267684631] [2020-08-19 04:24:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-19 04:24:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:16,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267684631] [2020-08-19 04:24:16,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:16,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 04:24:16,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132995647] [2020-08-19 04:24:16,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:24:16,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:16,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:24:16,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:24:16,698 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-08-19 04:24:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:16,792 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-08-19 04:24:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:24:16,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-19 04:24:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:16,793 INFO L225 Difference]: With dead ends: 36 [2020-08-19 04:24:16,794 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 04:24:16,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:24:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 04:24:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-19 04:24:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-19 04:24:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-19 04:24:16,801 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-08-19 04:24:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:16,801 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-19 04:24:16,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:24:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-19 04:24:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:24:16,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:16,803 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] [2020-08-19 04:24:16,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:24:16,803 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:16,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-08-19 04:24:16,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:16,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568119164] [2020-08-19 04:24:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 04:24:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:16,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568119164] [2020-08-19 04:24:16,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:16,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 04:24:16,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868628538] [2020-08-19 04:24:16,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:24:16,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:16,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:24:16,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:24:16,894 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-19 04:24:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:16,959 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-19 04:24:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:24:16,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-19 04:24:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:16,960 INFO L225 Difference]: With dead ends: 38 [2020-08-19 04:24:16,961 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 04:24:16,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:24:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 04:24:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-19 04:24:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-19 04:24:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-19 04:24:16,968 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-08-19 04:24:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:16,968 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-19 04:24:16,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:24:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-19 04:24:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 04:24:16,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:16,970 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:16,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:24:16,971 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:16,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-08-19 04:24:16,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:16,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351068275] [2020-08-19 04:24:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 04:24:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:17,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351068275] [2020-08-19 04:24:17,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:17,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:24:17,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375226526] [2020-08-19 04:24:17,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:24:17,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:24:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:24:17,117 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-08-19 04:24:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:17,182 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-08-19 04:24:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:24:17,183 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-19 04:24:17,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:17,184 INFO L225 Difference]: With dead ends: 40 [2020-08-19 04:24:17,184 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 04:24:17,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:24:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 04:24:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-19 04:24:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 04:24:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 04:24:17,191 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-08-19 04:24:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:17,192 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 04:24:17,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:24:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 04:24:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 04:24:17,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:17,193 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:17,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:24:17,194 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:17,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-08-19 04:24:17,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:17,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236073925] [2020-08-19 04:24:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 04:24:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:17,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236073925] [2020-08-19 04:24:17,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:17,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 04:24:17,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113434565] [2020-08-19 04:24:17,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:24:17,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:17,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:24:17,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:24:17,308 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-08-19 04:24:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:17,377 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-19 04:24:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:24:17,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-19 04:24:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:17,378 INFO L225 Difference]: With dead ends: 42 [2020-08-19 04:24:17,379 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 04:24:17,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:24:17,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 04:24:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-19 04:24:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-19 04:24:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-08-19 04:24:17,385 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-08-19 04:24:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:17,386 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-08-19 04:24:17,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:24:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-08-19 04:24:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 04:24:17,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:17,387 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:17,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:24:17,387 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:17,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:17,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-08-19 04:24:17,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:17,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070580278] [2020-08-19 04:24:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 04:24:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:17,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070580278] [2020-08-19 04:24:17,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:17,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:24:17,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413625818] [2020-08-19 04:24:17,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:24:17,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:17,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:24:17,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:24:17,507 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-08-19 04:24:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:17,599 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-08-19 04:24:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:24:17,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-19 04:24:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:17,601 INFO L225 Difference]: With dead ends: 44 [2020-08-19 04:24:17,601 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 04:24:17,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:24:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 04:24:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-19 04:24:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-19 04:24:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-19 04:24:17,611 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-08-19 04:24:17,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:17,613 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-19 04:24:17,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:24:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-19 04:24:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 04:24:17,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:17,617 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:17,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:24:17,617 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-08-19 04:24:17,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:17,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633637747] [2020-08-19 04:24:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 04:24:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:17,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633637747] [2020-08-19 04:24:17,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:17,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:24:17,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779988838] [2020-08-19 04:24:17,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:24:17,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:17,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:24:17,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:24:17,755 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-08-19 04:24:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:17,823 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-08-19 04:24:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:24:17,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-19 04:24:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:17,825 INFO L225 Difference]: With dead ends: 46 [2020-08-19 04:24:17,825 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 04:24:17,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:24:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 04:24:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-19 04:24:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 04:24:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 04:24:17,831 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-08-19 04:24:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:17,831 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 04:24:17,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:24:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 04:24:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 04:24:17,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:17,833 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:17,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:24:17,833 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-08-19 04:24:17,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:17,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122033456] [2020-08-19 04:24:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 04:24:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:17,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122033456] [2020-08-19 04:24:17,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:17,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:24:18,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182557182] [2020-08-19 04:24:18,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:24:18,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:18,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:24:18,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:24:18,007 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 04:24:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:18,136 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-19 04:24:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:24:18,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-19 04:24:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:18,138 INFO L225 Difference]: With dead ends: 48 [2020-08-19 04:24:18,138 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 04:24:18,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:24:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 04:24:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-19 04:24:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-19 04:24:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-08-19 04:24:18,149 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-08-19 04:24:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:18,149 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-08-19 04:24:18,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:24:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-08-19 04:24:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 04:24:18,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:18,153 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:18,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:24:18,154 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-08-19 04:24:18,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:18,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953082399] [2020-08-19 04:24:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:18,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:18,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 04:24:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:18,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953082399] [2020-08-19 04:24:18,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:18,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 04:24:18,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796893016] [2020-08-19 04:24:18,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 04:24:18,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:18,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 04:24:18,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:24:18,335 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-08-19 04:24:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:18,413 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-08-19 04:24:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 04:24:18,414 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-19 04:24:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:18,414 INFO L225 Difference]: With dead ends: 50 [2020-08-19 04:24:18,415 INFO L226 Difference]: Without dead ends: 38 [2020-08-19 04:24:18,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:24:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-19 04:24:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-19 04:24:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 04:24:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-19 04:24:18,421 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-08-19 04:24:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:18,421 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-19 04:24:18,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 04:24:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-19 04:24:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-19 04:24:18,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:18,422 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:18,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:24:18,423 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:18,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:18,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-08-19 04:24:18,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:18,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021627313] [2020-08-19 04:24:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:18,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:18,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 04:24:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:18,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021627313] [2020-08-19 04:24:18,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:18,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 04:24:18,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077159594] [2020-08-19 04:24:18,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 04:24:18,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:18,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 04:24:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:24:18,559 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2020-08-19 04:24:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:18,647 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-08-19 04:24:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 04:24:18,648 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-19 04:24:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:18,649 INFO L225 Difference]: With dead ends: 52 [2020-08-19 04:24:18,649 INFO L226 Difference]: Without dead ends: 40 [2020-08-19 04:24:18,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:24:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-19 04:24:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-19 04:24:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 04:24:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 04:24:18,655 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-08-19 04:24:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:18,655 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 04:24:18,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 04:24:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 04:24:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 04:24:18,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:18,656 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:18,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:24:18,657 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-08-19 04:24:18,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:18,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039315557] [2020-08-19 04:24:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:18,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:18,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 04:24:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:18,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039315557] [2020-08-19 04:24:18,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:18,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 04:24:18,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436469835] [2020-08-19 04:24:18,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 04:24:18,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:18,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 04:24:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:24:18,806 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-08-19 04:24:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:18,898 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-19 04:24:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 04:24:18,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-19 04:24:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:18,900 INFO L225 Difference]: With dead ends: 54 [2020-08-19 04:24:18,900 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 04:24:18,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:24:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 04:24:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-19 04:24:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-19 04:24:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-08-19 04:24:18,906 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-08-19 04:24:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:18,907 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-08-19 04:24:18,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 04:24:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-08-19 04:24:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 04:24:18,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:18,908 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:18,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 04:24:18,908 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:18,909 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-08-19 04:24:18,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:18,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191182262] [2020-08-19 04:24:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 04:24:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:19,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191182262] [2020-08-19 04:24:19,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:19,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 04:24:19,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672035585] [2020-08-19 04:24:19,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 04:24:19,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:19,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 04:24:19,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:24:19,063 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-08-19 04:24:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:19,183 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-08-19 04:24:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 04:24:19,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-19 04:24:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:19,184 INFO L225 Difference]: With dead ends: 56 [2020-08-19 04:24:19,185 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 04:24:19,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:24:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 04:24:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-19 04:24:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 04:24:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-19 04:24:19,190 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-08-19 04:24:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:19,190 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-19 04:24:19,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 04:24:19,191 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-19 04:24:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 04:24:19,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:19,192 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:19,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 04:24:19,192 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:19,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:19,192 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-08-19 04:24:19,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:19,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265286024] [2020-08-19 04:24:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 04:24:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:19,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265286024] [2020-08-19 04:24:19,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:19,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 04:24:19,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692908056] [2020-08-19 04:24:19,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 04:24:19,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:19,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 04:24:19,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-19 04:24:19,361 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 16 states. [2020-08-19 04:24:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:19,447 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-08-19 04:24:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 04:24:19,448 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-08-19 04:24:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:19,448 INFO L225 Difference]: With dead ends: 58 [2020-08-19 04:24:19,449 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 04:24:19,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-19 04:24:19,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 04:24:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-19 04:24:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 04:24:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 04:24:19,454 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-08-19 04:24:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:19,454 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 04:24:19,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 04:24:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 04:24:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 04:24:19,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:19,455 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:19,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 04:24:19,456 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:19,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-08-19 04:24:19,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:19,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670568212] [2020-08-19 04:24:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:24:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:19,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670568212] [2020-08-19 04:24:19,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:19,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 04:24:19,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736409471] [2020-08-19 04:24:19,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 04:24:19,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:19,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 04:24:19,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:24:19,651 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-08-19 04:24:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:19,748 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-19 04:24:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 04:24:19,749 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-19 04:24:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:19,749 INFO L225 Difference]: With dead ends: 60 [2020-08-19 04:24:19,750 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 04:24:19,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:24:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 04:24:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-19 04:24:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-19 04:24:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-08-19 04:24:19,755 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-08-19 04:24:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:19,756 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-08-19 04:24:19,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 04:24:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-08-19 04:24:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 04:24:19,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:19,757 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:19,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 04:24:19,757 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:19,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:19,758 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-08-19 04:24:19,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:19,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542058449] [2020-08-19 04:24:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 04:24:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:19,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542058449] [2020-08-19 04:24:19,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:19,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 04:24:19,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513324954] [2020-08-19 04:24:19,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 04:24:19,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:19,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 04:24:19,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-19 04:24:19,965 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-08-19 04:24:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:20,067 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-08-19 04:24:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 04:24:20,068 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-08-19 04:24:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:20,069 INFO L225 Difference]: With dead ends: 62 [2020-08-19 04:24:20,069 INFO L226 Difference]: Without dead ends: 50 [2020-08-19 04:24:20,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-19 04:24:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-19 04:24:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-08-19 04:24:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-19 04:24:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-19 04:24:20,085 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-08-19 04:24:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:20,086 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-19 04:24:20,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 04:24:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-19 04:24:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 04:24:20,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:20,087 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:20,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 04:24:20,087 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-08-19 04:24:20,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:20,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039964141] [2020-08-19 04:24:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:20,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:20,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 04:24:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:20,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039964141] [2020-08-19 04:24:20,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:20,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 04:24:20,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670381349] [2020-08-19 04:24:20,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 04:24:20,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:20,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 04:24:20,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:24:20,314 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2020-08-19 04:24:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:20,416 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-08-19 04:24:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 04:24:20,417 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-08-19 04:24:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:20,418 INFO L225 Difference]: With dead ends: 64 [2020-08-19 04:24:20,418 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 04:24:20,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:24:20,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 04:24:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-19 04:24:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 04:24:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-19 04:24:20,426 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-08-19 04:24:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:20,427 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-19 04:24:20,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 04:24:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-19 04:24:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 04:24:20,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:20,428 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:20,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 04:24:20,428 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-08-19 04:24:20,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:20,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311220276] [2020-08-19 04:24:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:20,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:20,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 04:24:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:20,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311220276] [2020-08-19 04:24:20,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:20,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 04:24:20,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152187157] [2020-08-19 04:24:20,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 04:24:20,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:20,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 04:24:20,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-19 04:24:20,726 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-08-19 04:24:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:20,841 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-19 04:24:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 04:24:20,842 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-08-19 04:24:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:20,843 INFO L225 Difference]: With dead ends: 66 [2020-08-19 04:24:20,843 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 04:24:20,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-19 04:24:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 04:24:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-19 04:24:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-19 04:24:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-19 04:24:20,848 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-08-19 04:24:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:20,849 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-19 04:24:20,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 04:24:20,849 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-19 04:24:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 04:24:20,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:20,850 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:20,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 04:24:20,850 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:20,851 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-08-19 04:24:20,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:20,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662151363] [2020-08-19 04:24:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:21,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:21,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 04:24:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:21,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662151363] [2020-08-19 04:24:21,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:21,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 04:24:21,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264885150] [2020-08-19 04:24:21,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 04:24:21,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:21,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 04:24:21,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-19 04:24:21,143 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-08-19 04:24:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:21,264 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-08-19 04:24:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 04:24:21,265 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-08-19 04:24:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:21,266 INFO L225 Difference]: With dead ends: 68 [2020-08-19 04:24:21,266 INFO L226 Difference]: Without dead ends: 56 [2020-08-19 04:24:21,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-19 04:24:21,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-19 04:24:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-19 04:24:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 04:24:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-19 04:24:21,274 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-08-19 04:24:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:21,274 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-19 04:24:21,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 04:24:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-19 04:24:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 04:24:21,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:21,275 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:21,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 04:24:21,276 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:21,276 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-08-19 04:24:21,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:21,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683391807] [2020-08-19 04:24:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:21,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:21,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 04:24:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:21,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683391807] [2020-08-19 04:24:21,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:21,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 04:24:21,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062820289] [2020-08-19 04:24:21,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 04:24:21,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:21,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 04:24:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-19 04:24:21,561 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2020-08-19 04:24:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:21,654 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-08-19 04:24:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 04:24:21,655 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-08-19 04:24:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:21,656 INFO L225 Difference]: With dead ends: 70 [2020-08-19 04:24:21,656 INFO L226 Difference]: Without dead ends: 58 [2020-08-19 04:24:21,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-19 04:24:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-19 04:24:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-19 04:24:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 04:24:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-19 04:24:21,662 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-08-19 04:24:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:21,664 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-19 04:24:21,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 04:24:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-19 04:24:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 04:24:21,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:21,665 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:21,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 04:24:21,665 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:21,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-08-19 04:24:21,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:21,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573382957] [2020-08-19 04:24:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:21,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:24:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:21,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:24:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:24:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:24:22,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573382957] [2020-08-19 04:24:22,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:24:22,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 04:24:22,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652311087] [2020-08-19 04:24:22,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 04:24:22,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:24:22,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 04:24:22,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:24:22,006 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2020-08-19 04:24:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:24:22,157 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-08-19 04:24:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 04:24:22,157 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-08-19 04:24:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:24:22,158 INFO L225 Difference]: With dead ends: 71 [2020-08-19 04:24:22,158 INFO L226 Difference]: Without dead ends: 59 [2020-08-19 04:24:22,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:24:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-19 04:24:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-19 04:24:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-19 04:24:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-08-19 04:24:22,165 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-08-19 04:24:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:24:22,165 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-08-19 04:24:22,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 04:24:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-08-19 04:24:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 04:24:22,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:24:22,166 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:24:22,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 04:24:22,166 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:24:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:24:22,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-08-19 04:24:22,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:24:22,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747385672] [2020-08-19 04:24:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:24:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 04:24:22,265 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 04:24:22,265 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 04:24:22,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 04:24:22,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:24:22 BoogieIcfgContainer [2020-08-19 04:24:22,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:24:22,297 INFO L168 Benchmark]: Toolchain (without parser) took 7164.98 ms. Allocated memory was 138.9 MB in the beginning and 317.2 MB in the end (delta: 178.3 MB). Free memory was 102.4 MB in the beginning and 227.4 MB in the end (delta: -124.9 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. [2020-08-19 04:24:22,298 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:24:22,299 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.50 ms. Allocated memory is still 138.9 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:24:22,299 INFO L168 Benchmark]: Boogie Preprocessor took 116.04 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 91.8 MB in the beginning and 178.1 MB in the end (delta: -86.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-19 04:24:22,300 INFO L168 Benchmark]: RCFGBuilder took 311.34 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 162.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-08-19 04:24:22,300 INFO L168 Benchmark]: TraceAbstraction took 6418.44 ms. Allocated memory was 200.8 MB in the beginning and 317.2 MB in the end (delta: 116.4 MB). Free memory was 161.9 MB in the beginning and 227.4 MB in the end (delta: -65.4 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. [2020-08-19 04:24:22,303 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.50 ms. Allocated memory is still 138.9 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.04 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 91.8 MB in the beginning and 178.1 MB in the end (delta: -86.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.34 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 162.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6418.44 ms. Allocated memory was 200.8 MB in the beginning and 317.2 MB in the end (delta: 116.4 MB). Free memory was 161.9 MB in the beginning and 227.4 MB in the end (delta: -65.4 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.3s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 1934 SDs, 0 SdLazy, 1339 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 336 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 69580 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2470 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...