/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:35:00,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:35:00,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:35:00,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 00:35:00,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 00:35:00,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 00:35:00,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 00:35:00,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 00:35:00,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 00:35:00,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 00:35:00,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 00:35:00,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 00:35:00,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:35:00,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:35:00,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:35:00,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:35:00,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:35:00,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:35:00,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:35:00,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:35:00,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:35:00,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:35:00,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:35:00,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:35:00,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 00:35:00,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 00:35:00,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 00:35:00,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 00:35:00,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 00:35:00,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 00:35:00,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:35:00,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:35:00,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:35:00,960 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 [2020-08-22 00:35:00,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:35:00,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:35:01,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:35:01,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:35:01,002 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:35:01,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:35:01,003 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:35:01,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:35:01,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:35:01,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:35:01,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:35:01,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:35:01,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:35:01,005 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:35:01,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:35:01,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:35:01,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:35:01,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:35:01,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:35:01,007 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:35:01,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:35:01,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:35:01,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:35:01,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:35:01,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:35:01,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:35:01,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:35:01,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:35:01,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:35:01,009 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 00:35:01,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:35:01,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:35:01,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:35:01,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:35:01,354 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:35:01,355 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-08-22 00:35:01,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9325b143/d7ae72a84ff44882bdc4c6cd4e54616f/FLAG6e6be9c50 [2020-08-22 00:35:01,876 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:35:01,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-08-22 00:35:01,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9325b143/d7ae72a84ff44882bdc4c6cd4e54616f/FLAG6e6be9c50 [2020-08-22 00:35:02,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9325b143/d7ae72a84ff44882bdc4c6cd4e54616f [2020-08-22 00:35:02,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:35:02,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:35:02,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:35:02,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:35:02,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:35:02,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:35:02" (1/1) ... [2020-08-22 00:35:02,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e62aa9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02, skipping insertion in model container [2020-08-22 00:35:02,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:35:02" (1/1) ... [2020-08-22 00:35:02,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:35:02,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:35:02,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:35:02,567 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:35:02,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:35:02,608 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:35:02,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02 WrapperNode [2020-08-22 00:35:02,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:35:02,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:35:02,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:35:02,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:35:02,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02" (1/1) ... [2020-08-22 00:35:02,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02" (1/1) ... [2020-08-22 00:35:02,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02" (1/1) ... [2020-08-22 00:35:02,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02" (1/1) ... [2020-08-22 00:35:02,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02" (1/1) ... [2020-08-22 00:35:02,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02" (1/1) ... [2020-08-22 00:35:02,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02" (1/1) ... [2020-08-22 00:35:02,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:35:02,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:35:02,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:35:02,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:35:02,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02" (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 [2020-08-22 00:35:02,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:35:02,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:35:02,805 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-22 00:35:02,805 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-22 00:35:02,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:35:02,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 00:35:02,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:35:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-22 00:35:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-22 00:35:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:35:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:35:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:35:03,076 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:35:03,077 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 00:35:03,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:35:03 BoogieIcfgContainer [2020-08-22 00:35:03,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:35:03,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:35:03,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:35:03,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:35:03,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:35:02" (1/3) ... [2020-08-22 00:35:03,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afcd10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:35:03, skipping insertion in model container [2020-08-22 00:35:03,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:35:02" (2/3) ... [2020-08-22 00:35:03,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afcd10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:35:03, skipping insertion in model container [2020-08-22 00:35:03,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:35:03" (3/3) ... [2020-08-22 00:35:03,116 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-08-22 00:35:03,125 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:35:03,132 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:35:03,146 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:35:03,171 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:35:03,171 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:35:03,171 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:35:03,172 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:35:03,172 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:35:03,172 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:35:03,172 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:35:03,173 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:35:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 00:35:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 00:35:03,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:03,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:03,199 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:03,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-22 00:35:03,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:03,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228242036] [2020-08-22 00:35:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:35:03,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228242036] [2020-08-22 00:35:03,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:35:03,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 00:35:03,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621000738] [2020-08-22 00:35:03,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:35:03,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:03,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:35:03,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:35:03,486 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-22 00:35:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:03,591 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-22 00:35:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:35:03,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 00:35:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:03,602 INFO L225 Difference]: With dead ends: 44 [2020-08-22 00:35:03,603 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 00:35:03,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:35:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 00:35:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 00:35:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 00:35:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-22 00:35:03,648 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-22 00:35:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:03,648 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-22 00:35:03,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:35:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-22 00:35:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 00:35:03,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:03,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:03,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:35:03,651 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:03,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-22 00:35:03,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:03,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024577240] [2020-08-22 00:35:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:35:03,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024577240] [2020-08-22 00:35:03,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:35:03,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 00:35:03,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444721710] [2020-08-22 00:35:03,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:35:03,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:03,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:35:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:35:03,723 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-22 00:35:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:03,785 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-22 00:35:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:35:03,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 00:35:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:03,788 INFO L225 Difference]: With dead ends: 36 [2020-08-22 00:35:03,788 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 00:35:03,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:35:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 00:35:03,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 00:35:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 00:35:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-22 00:35:03,799 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-22 00:35:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:03,799 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-22 00:35:03,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:35:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-22 00:35:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 00:35:03,801 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:03,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:03,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:35:03,802 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:03,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-22 00:35:03,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:03,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408548631] [2020-08-22 00:35:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 00:35:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 00:35:03,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408548631] [2020-08-22 00:35:03,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:03,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 00:35:03,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335158209] [2020-08-22 00:35:03,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:35:03,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:03,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:35:03,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:35:03,942 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-22 00:35:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:04,029 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-22 00:35:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 00:35:04,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-22 00:35:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:04,031 INFO L225 Difference]: With dead ends: 58 [2020-08-22 00:35:04,032 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 00:35:04,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:35:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 00:35:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-22 00:35:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 00:35:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-22 00:35:04,045 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-22 00:35:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:04,046 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-22 00:35:04,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:35:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-22 00:35:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 00:35:04,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:04,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:04,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:35:04,052 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:04,054 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-22 00:35:04,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:04,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028797222] [2020-08-22 00:35:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 00:35:04,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028797222] [2020-08-22 00:35:04,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:04,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 00:35:04,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924100073] [2020-08-22 00:35:04,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:35:04,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:04,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:35:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:35:04,184 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-22 00:35:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:04,399 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-22 00:35:04,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:35:04,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-22 00:35:04,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:04,404 INFO L225 Difference]: With dead ends: 54 [2020-08-22 00:35:04,404 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 00:35:04,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:35:04,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 00:35:04,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-22 00:35:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 00:35:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-22 00:35:04,419 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-22 00:35:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:04,420 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-22 00:35:04,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:35:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-22 00:35:04,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 00:35:04,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:04,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:04,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:35:04,423 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-22 00:35:04,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:04,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351428624] [2020-08-22 00:35:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 00:35:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:35:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 00:35:04,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351428624] [2020-08-22 00:35:04,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:04,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 00:35:04,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429235379] [2020-08-22 00:35:04,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 00:35:04,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:04,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 00:35:04,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:35:04,545 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-22 00:35:04,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:04,633 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-22 00:35:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 00:35:04,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-22 00:35:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:04,636 INFO L225 Difference]: With dead ends: 94 [2020-08-22 00:35:04,636 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 00:35:04,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:35:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 00:35:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 00:35:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 00:35:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-22 00:35:04,650 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-22 00:35:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:04,650 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-22 00:35:04,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 00:35:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-22 00:35:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 00:35:04,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:04,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:04,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:35:04,654 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:04,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-22 00:35:04,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:04,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390843753] [2020-08-22 00:35:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 00:35:04,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390843753] [2020-08-22 00:35:04,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:04,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 00:35:04,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571021937] [2020-08-22 00:35:04,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:35:04,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:04,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:35:04,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:35:04,873 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-22 00:35:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:05,000 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-22 00:35:05,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 00:35:05,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-22 00:35:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:05,003 INFO L225 Difference]: With dead ends: 103 [2020-08-22 00:35:05,003 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 00:35:05,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:35:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 00:35:05,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-22 00:35:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 00:35:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-22 00:35:05,016 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-22 00:35:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:05,017 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-22 00:35:05,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:35:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-22 00:35:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 00:35:05,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:05,019 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:05,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:35:05,020 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:05,020 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-22 00:35:05,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:05,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353497281] [2020-08-22 00:35:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 00:35:05,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353497281] [2020-08-22 00:35:05,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:05,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 00:35:05,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130389420] [2020-08-22 00:35:05,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:35:05,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:05,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:35:05,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:35:05,139 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-22 00:35:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:05,352 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-22 00:35:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:35:05,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-22 00:35:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:05,357 INFO L225 Difference]: With dead ends: 86 [2020-08-22 00:35:05,358 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 00:35:05,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:35:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 00:35:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-22 00:35:05,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 00:35:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-22 00:35:05,398 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-22 00:35:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:05,399 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-22 00:35:05,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:35:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-22 00:35:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 00:35:05,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:05,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:05,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 00:35:05,409 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-22 00:35:05,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:05,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342308809] [2020-08-22 00:35:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 00:35:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-22 00:35:05,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342308809] [2020-08-22 00:35:05,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:05,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 00:35:05,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812251032] [2020-08-22 00:35:05,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 00:35:05,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:05,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 00:35:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:35:05,631 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-22 00:35:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:05,747 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-22 00:35:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:35:05,748 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-22 00:35:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:05,750 INFO L225 Difference]: With dead ends: 167 [2020-08-22 00:35:05,750 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 00:35:05,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:35:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 00:35:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-22 00:35:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 00:35:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-22 00:35:05,770 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-22 00:35:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:05,770 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-22 00:35:05,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 00:35:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-22 00:35:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 00:35:05,773 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:05,773 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:05,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 00:35:05,774 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:05,774 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-22 00:35:05,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:05,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260179011] [2020-08-22 00:35:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:35:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 00:35:05,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260179011] [2020-08-22 00:35:05,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:05,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 00:35:05,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624503684] [2020-08-22 00:35:05,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:35:05,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:05,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:35:05,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:35:05,918 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-22 00:35:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:06,167 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-22 00:35:06,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:35:06,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-22 00:35:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:06,170 INFO L225 Difference]: With dead ends: 188 [2020-08-22 00:35:06,173 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 00:35:06,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:35:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 00:35:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-22 00:35:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 00:35:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-22 00:35:06,217 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-22 00:35:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:06,220 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-22 00:35:06,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:35:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-22 00:35:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 00:35:06,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:06,225 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:06,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 00:35:06,228 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:06,228 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-22 00:35:06,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:06,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246227985] [2020-08-22 00:35:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:35:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-22 00:35:06,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246227985] [2020-08-22 00:35:06,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:06,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 00:35:06,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965275547] [2020-08-22 00:35:06,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 00:35:06,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 00:35:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 00:35:06,478 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-22 00:35:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:06,881 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-22 00:35:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 00:35:06,882 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-22 00:35:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:06,884 INFO L225 Difference]: With dead ends: 199 [2020-08-22 00:35:06,884 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 00:35:06,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-22 00:35:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 00:35:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-22 00:35:06,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 00:35:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2020-08-22 00:35:06,896 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 82 [2020-08-22 00:35:06,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:06,897 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2020-08-22 00:35:06,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 00:35:06,897 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2020-08-22 00:35:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 00:35:06,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:06,899 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:06,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 00:35:06,899 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-08-22 00:35:06,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:06,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597111364] [2020-08-22 00:35:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:06,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:35:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-22 00:35:07,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597111364] [2020-08-22 00:35:07,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:07,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 00:35:07,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966109176] [2020-08-22 00:35:07,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 00:35:07,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 00:35:07,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 00:35:07,344 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand 17 states. [2020-08-22 00:35:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:07,566 INFO L93 Difference]: Finished difference Result 96 states and 126 transitions. [2020-08-22 00:35:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 00:35:07,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-08-22 00:35:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:07,569 INFO L225 Difference]: With dead ends: 96 [2020-08-22 00:35:07,569 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 00:35:07,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-22 00:35:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 00:35:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-08-22 00:35:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 00:35:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-08-22 00:35:07,591 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 68 [2020-08-22 00:35:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:07,592 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-08-22 00:35:07,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 00:35:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-08-22 00:35:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 00:35:07,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:07,594 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:07,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 00:35:07,594 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:07,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 2 times [2020-08-22 00:35:07,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:07,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92001765] [2020-08-22 00:35:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 00:35:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 00:35:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-08-22 00:35:07,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92001765] [2020-08-22 00:35:07,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:07,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 00:35:07,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130576224] [2020-08-22 00:35:07,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:35:07,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:07,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:35:07,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:35:07,739 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 7 states. [2020-08-22 00:35:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:07,843 INFO L93 Difference]: Finished difference Result 143 states and 199 transitions. [2020-08-22 00:35:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:35:07,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-22 00:35:07,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:07,845 INFO L225 Difference]: With dead ends: 143 [2020-08-22 00:35:07,845 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 00:35:07,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:35:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 00:35:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-22 00:35:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 00:35:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-08-22 00:35:07,854 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 69 [2020-08-22 00:35:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:07,854 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-08-22 00:35:07,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:35:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-08-22 00:35:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 00:35:07,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:07,857 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:07,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 00:35:07,857 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:07,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 3 times [2020-08-22 00:35:07,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:07,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552230828] [2020-08-22 00:35:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:07,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:35:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 00:35:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:35:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-22 00:35:08,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552230828] [2020-08-22 00:35:08,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:08,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 00:35:08,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552672205] [2020-08-22 00:35:08,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:35:08,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:08,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:35:08,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:35:08,076 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 10 states. [2020-08-22 00:35:08,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:08,259 INFO L93 Difference]: Finished difference Result 131 states and 175 transitions. [2020-08-22 00:35:08,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 00:35:08,259 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-22 00:35:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:08,260 INFO L225 Difference]: With dead ends: 131 [2020-08-22 00:35:08,261 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 00:35:08,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:35:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 00:35:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-22 00:35:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 00:35:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-08-22 00:35:08,268 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 110 [2020-08-22 00:35:08,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:08,269 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-08-22 00:35:08,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:35:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-08-22 00:35:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 00:35:08,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:35:08,271 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:35:08,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 00:35:08,271 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:35:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:35:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 2 times [2020-08-22 00:35:08,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:35:08,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608488373] [2020-08-22 00:35:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:35:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:35:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 00:35:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:35:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 00:35:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:35:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:35:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 00:35:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 00:35:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:35:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 40 proven. 124 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-08-22 00:35:08,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608488373] [2020-08-22 00:35:08,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:35:08,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 00:35:08,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611761268] [2020-08-22 00:35:08,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:35:08,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:35:08,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:35:08,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:35:08,629 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 10 states. [2020-08-22 00:35:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:35:08,807 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-08-22 00:35:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:35:08,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2020-08-22 00:35:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:35:08,808 INFO L225 Difference]: With dead ends: 77 [2020-08-22 00:35:08,808 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 00:35:08,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:35:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 00:35:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 00:35:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 00:35:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 00:35:08,813 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-08-22 00:35:08,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:35:08,813 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 00:35:08,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:35:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 00:35:08,814 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 00:35:08,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 00:35:08,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 00:35:09,279 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2020-08-22 00:35:09,511 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-08-22 00:35:09,515 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 00:35:09,515 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:35:09,515 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:35:09,515 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 00:35:09,515 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 00:35:09,515 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 00:35:09,516 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-22 00:35:09,516 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-22 00:35:09,516 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-22 00:35:09,516 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-22 00:35:09,516 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-22 00:35:09,516 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-22 00:35:09,517 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-08-22 00:35:09,517 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-22 00:35:09,517 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-22 00:35:09,517 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-22 00:35:09,518 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-22 00:35:09,518 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-22 00:35:09,518 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|) (<= |fibo2_#in~n| 2)) (and (<= 4 fibo2_~n) .cse0))) [2020-08-22 00:35:09,519 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-22 00:35:09,519 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-22 00:35:09,519 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-22 00:35:09,519 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-22 00:35:09,519 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-22 00:35:09,519 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-22 00:35:09,520 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2020-08-22 00:35:09,520 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-22 00:35:09,520 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= |fibo1_#in~n| 3) .cse0) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (not (<= |fibo1_#in~n| 2)) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (<= 4 fibo1_~n))) [2020-08-22 00:35:09,520 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-22 00:35:09,521 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-22 00:35:09,521 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-22 00:35:09,521 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-22 00:35:09,521 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-22 00:35:09,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 12:35:09 BoogieIcfgContainer [2020-08-22 00:35:09,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 00:35:09,533 INFO L168 Benchmark]: Toolchain (without parser) took 7268.74 ms. Allocated memory was 140.5 MB in the beginning and 310.4 MB in the end (delta: 169.9 MB). Free memory was 104.2 MB in the beginning and 118.1 MB in the end (delta: -13.9 MB). Peak memory consumption was 156.0 MB. Max. memory is 7.1 GB. [2020-08-22 00:35:09,533 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 00:35:09,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.48 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 94.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 00:35:09,540 INFO L168 Benchmark]: Boogie Preprocessor took 126.60 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 182.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-22 00:35:09,545 INFO L168 Benchmark]: RCFGBuilder took 352.80 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 169.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-22 00:35:09,546 INFO L168 Benchmark]: TraceAbstraction took 6432.98 ms. Allocated memory was 203.9 MB in the beginning and 310.4 MB in the end (delta: 106.4 MB). Free memory was 168.9 MB in the beginning and 118.1 MB in the end (delta: 50.8 MB). Peak memory consumption was 157.2 MB. Max. memory is 7.1 GB. [2020-08-22 00:35:09,554 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 347.48 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 94.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.60 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 182.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 352.80 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 169.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6432.98 ms. Allocated memory was 203.9 MB in the beginning and 310.4 MB in the end (delta: 106.4 MB). Free memory was 168.9 MB in the beginning and 118.1 MB in the end (delta: 50.8 MB). Peak memory consumption was 157.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.6s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 436 SDtfs, 293 SDslu, 2109 SDs, 0 SdLazy, 1556 SolverSat, 153 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 48 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 344 PreInvPairs, 398 NumberOfFragments, 94 HoareAnnotationTreeSize, 344 FomulaSimplifications, 448 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 770 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 774 NumberOfCodeBlocks, 774 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 760 ConstructedInterpolants, 0 QuantifiedInterpolants, 103564 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 816/1159 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 correct! Received shutdown request...