/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:53:29,069 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 06:53:29,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:53:29,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:53:29,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:53:29,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:53:29,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:53:29,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:53:29,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:53:29,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:53:29,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:53:29,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:53:29,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:53:29,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:53:29,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:53:29,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:53:29,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:53:29,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:53:29,135 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:53:29,186 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:53:29,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:53:29,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:53:29,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:53:29,188 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:53:29,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:53:29,188 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:53:29,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:53:29,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:53:29,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:53:29,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:53:29,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:53:29,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:53:29,191 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:53:29,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:53:29,191 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:53:29,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:53:29,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:53:29,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:53:29,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:53:29,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:53:29,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:53:29,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:53:29,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:53:29,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:53:29,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:53:29,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:53:29,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:53:29,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:53:29,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:53:29,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:53:29,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:53:29,539 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:53:29,541 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:53:29,541 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:53:29,542 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-19 06:53:29,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/757f2aec8/e10ba6183ba2471ab2178523c5efe70c/FLAG97a377428 [2020-08-19 06:53:30,214 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:53:30,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-19 06:53:30,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/757f2aec8/e10ba6183ba2471ab2178523c5efe70c/FLAG97a377428 [2020-08-19 06:53:30,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/757f2aec8/e10ba6183ba2471ab2178523c5efe70c [2020-08-19 06:53:30,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:53:30,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:53:30,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:53:30,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:53:30,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:53:30,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:53:30" (1/1) ... [2020-08-19 06:53:30,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4957d7b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:30, skipping insertion in model container [2020-08-19 06:53:30,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:53:30" (1/1) ... [2020-08-19 06:53:30,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:53:30,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:53:31,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:53:31,144 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:53:31,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:53:31,323 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:53:31,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:31 WrapperNode [2020-08-19 06:53:31,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:53:31,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:53:31,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:53:31,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:53:31,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:31" (1/1) ... [2020-08-19 06:53:31,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:31" (1/1) ... [2020-08-19 06:53:31,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:31" (1/1) ... [2020-08-19 06:53:31,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:31" (1/1) ... [2020-08-19 06:53:31,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:31" (1/1) ... [2020-08-19 06:53:31,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:31" (1/1) ... [2020-08-19 06:53:31,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:31" (1/1) ... [2020-08-19 06:53:31,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:53:31,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:53:31,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:53:31,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:53:31,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:53:31,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:53:31,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:53:31,538 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-19 06:53:31,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:53:31,539 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-19 06:53:31,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:53:31,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:53:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-19 06:53:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:53:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:53:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:53:33,031 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:53:33,031 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:53:33,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:53:33 BoogieIcfgContainer [2020-08-19 06:53:33,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:53:33,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:53:33,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:53:33,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:53:33,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:53:30" (1/3) ... [2020-08-19 06:53:33,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4199ce67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:53:33, skipping insertion in model container [2020-08-19 06:53:33,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:53:31" (2/3) ... [2020-08-19 06:53:33,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4199ce67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:53:33, skipping insertion in model container [2020-08-19 06:53:33,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:53:33" (3/3) ... [2020-08-19 06:53:33,056 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2020-08-19 06:53:33,067 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:53:33,077 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:53:33,091 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:53:33,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:53:33,124 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:53:33,124 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:53:33,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:53:33,125 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:53:33,125 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:53:33,125 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:53:33,125 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:53:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-19 06:53:33,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-19 06:53:33,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:53:33,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:53:33,165 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:53:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:53:33,171 INFO L82 PathProgramCache]: Analyzing trace with hash -184228989, now seen corresponding path program 1 times [2020-08-19 06:53:33,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:53:33,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238919821] [2020-08-19 06:53:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:53:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:33,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:53:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:53:33,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238919821] [2020-08-19 06:53:33,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:53:33,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:53:33,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335566005] [2020-08-19 06:53:33,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:53:33,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:53:33,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:53:33,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:53:33,639 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-19 06:53:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:53:36,358 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-19 06:53:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:53:36,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-08-19 06:53:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:53:36,382 INFO L225 Difference]: With dead ends: 886 [2020-08-19 06:53:36,382 INFO L226 Difference]: Without dead ends: 564 [2020-08-19 06:53:36,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:53:36,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-19 06:53:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-19 06:53:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-19 06:53:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-19 06:53:36,504 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 60 [2020-08-19 06:53:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:53:36,505 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-19 06:53:36,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:53:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-19 06:53:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-19 06:53:36,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:53:36,514 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:53:36,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:53:36,515 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:53:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:53:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2117260534, now seen corresponding path program 1 times [2020-08-19 06:53:36,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:53:36,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274353056] [2020-08-19 06:53:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:53:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:36,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:53:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:36,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:53:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:53:36,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274353056] [2020-08-19 06:53:36,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:53:36,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:53:36,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113234021] [2020-08-19 06:53:36,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:53:36,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:53:36,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:53:36,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:53:36,824 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-19 06:53:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:53:38,845 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-19 06:53:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:53:38,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-08-19 06:53:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:53:38,857 INFO L225 Difference]: With dead ends: 1518 [2020-08-19 06:53:38,857 INFO L226 Difference]: Without dead ends: 964 [2020-08-19 06:53:38,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:53:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-19 06:53:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-19 06:53:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-19 06:53:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-19 06:53:38,933 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 154 [2020-08-19 06:53:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:53:38,934 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-19 06:53:38,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:53:38,934 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-19 06:53:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-19 06:53:38,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:53:38,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:53:38,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:53:38,951 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:53:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:53:38,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1698067270, now seen corresponding path program 1 times [2020-08-19 06:53:38,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:53:38,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446519969] [2020-08-19 06:53:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:53:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:39,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:53:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:39,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:53:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:53:39,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446519969] [2020-08-19 06:53:39,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:53:39,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 06:53:39,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941356572] [2020-08-19 06:53:39,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:53:39,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:53:39,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:53:39,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:53:39,466 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-19 06:53:41,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:53:41,464 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-19 06:53:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:53:41,466 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-08-19 06:53:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:53:41,479 INFO L225 Difference]: With dead ends: 2490 [2020-08-19 06:53:41,479 INFO L226 Difference]: Without dead ends: 1552 [2020-08-19 06:53:41,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:53:41,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-19 06:53:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-19 06:53:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-19 06:53:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-19 06:53:41,566 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 200 [2020-08-19 06:53:41,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:53:41,567 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-19 06:53:41,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:53:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-19 06:53:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-19 06:53:41,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:53:41,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-08-19 06:53:41,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:53:41,575 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:53:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:53:41,576 INFO L82 PathProgramCache]: Analyzing trace with hash 328652488, now seen corresponding path program 1 times [2020-08-19 06:53:41,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:53:41,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038366578] [2020-08-19 06:53:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:53:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:41,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:53:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:41,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:53:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:41,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:53:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 106 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 06:53:41,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038366578] [2020-08-19 06:53:41,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:53:41,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:53:41,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587109939] [2020-08-19 06:53:41,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:53:41,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:53:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:53:41,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:53:41,956 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-19 06:53:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:53:43,752 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-19 06:53:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:53:43,753 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2020-08-19 06:53:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:53:43,764 INFO L225 Difference]: With dead ends: 3412 [2020-08-19 06:53:43,764 INFO L226 Difference]: Without dead ends: 1900 [2020-08-19 06:53:43,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:53:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-19 06:53:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-19 06:53:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-19 06:53:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-19 06:53:43,832 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 219 [2020-08-19 06:53:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:53:43,832 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-19 06:53:43,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:53:43,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-19 06:53:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-08-19 06:53:43,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:53:43,839 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:53:43,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:53:43,840 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:53:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:53:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash -56962879, now seen corresponding path program 1 times [2020-08-19 06:53:43,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:53:43,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273112229] [2020-08-19 06:53:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:53:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:44,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:53:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:44,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:53:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:44,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 06:53:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:44,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-19 06:53:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 193 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 06:53:44,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273112229] [2020-08-19 06:53:44,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:53:44,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:53:44,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866179746] [2020-08-19 06:53:44,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:53:44,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:53:44,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:53:44,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:53:44,719 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-19 06:53:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:53:47,304 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-19 06:53:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 06:53:47,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 303 [2020-08-19 06:53:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:53:47,316 INFO L225 Difference]: With dead ends: 3677 [2020-08-19 06:53:47,317 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 06:53:47,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:53:47,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 06:53:47,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-19 06:53:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-19 06:53:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-19 06:53:47,389 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 303 [2020-08-19 06:53:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:53:47,390 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-19 06:53:47,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:53:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-19 06:53:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-08-19 06:53:47,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:53:47,404 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2020-08-19 06:53:47,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:53:47,404 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:53:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:53:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash -48667167, now seen corresponding path program 1 times [2020-08-19 06:53:47,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:53:47,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610675061] [2020-08-19 06:53:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:53:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:47,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:53:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:47,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:53:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:47,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:53:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:47,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:53:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:47,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-19 06:53:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 438 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-19 06:53:48,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610675061] [2020-08-19 06:53:48,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:53:48,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:53:48,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232904402] [2020-08-19 06:53:48,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:53:48,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:53:48,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:53:48,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:53:48,046 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-19 06:53:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:53:52,612 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-19 06:53:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 06:53:52,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 438 [2020-08-19 06:53:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:53:52,629 INFO L225 Difference]: With dead ends: 5238 [2020-08-19 06:53:52,629 INFO L226 Difference]: Without dead ends: 3356 [2020-08-19 06:53:52,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:53:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-19 06:53:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-19 06:53:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-19 06:53:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-19 06:53:52,707 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 438 [2020-08-19 06:53:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:53:52,708 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-19 06:53:52,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:53:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-19 06:53:52,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-08-19 06:53:52,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:53:52,723 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:53:52,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:53:52,724 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:53:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:53:52,724 INFO L82 PathProgramCache]: Analyzing trace with hash -347726080, now seen corresponding path program 1 times [2020-08-19 06:53:52,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:53:52,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020035385] [2020-08-19 06:53:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:53:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:52,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:53:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:52,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:53:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:53,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:53:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:53,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:53:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:53,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-19 06:53:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:53,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-19 06:53:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 668 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-19 06:53:54,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020035385] [2020-08-19 06:53:54,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:53:54,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:53:54,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305372164] [2020-08-19 06:53:54,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:53:54,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:53:54,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:53:54,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:53:54,555 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-19 06:53:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:53:57,747 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-19 06:53:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:53:57,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 558 [2020-08-19 06:53:57,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:53:57,761 INFO L225 Difference]: With dead ends: 5701 [2020-08-19 06:53:57,761 INFO L226 Difference]: Without dead ends: 3400 [2020-08-19 06:53:57,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:53:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-19 06:53:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-19 06:53:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-19 06:53:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3495 transitions. [2020-08-19 06:53:57,837 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3495 transitions. Word has length 558 [2020-08-19 06:53:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:53:57,838 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3495 transitions. [2020-08-19 06:53:57,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:53:57,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3495 transitions. [2020-08-19 06:53:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-08-19 06:53:57,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:53:57,855 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:53:57,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:53:57,856 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:53:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:53:57,856 INFO L82 PathProgramCache]: Analyzing trace with hash -229639858, now seen corresponding path program 1 times [2020-08-19 06:53:57,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:53:57,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13855655] [2020-08-19 06:53:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:53:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:58,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:53:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:58,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:53:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:58,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:53:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:58,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:53:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:58,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-19 06:53:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:53:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 439 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-19 06:53:59,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13855655] [2020-08-19 06:53:59,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:53:59,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:53:59,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170823575] [2020-08-19 06:53:59,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:53:59,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:53:59,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:53:59,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:53:59,229 INFO L87 Difference]: Start difference. First operand 3174 states and 3495 transitions. Second operand 10 states. [2020-08-19 06:53:59,872 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-08-19 06:54:01,284 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-08-19 06:54:01,941 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-08-19 06:54:02,121 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-08-19 06:54:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:54:02,805 INFO L93 Difference]: Finished difference Result 5994 states and 6643 transitions. [2020-08-19 06:54:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 06:54:02,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 591 [2020-08-19 06:54:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:54:02,824 INFO L225 Difference]: With dead ends: 5994 [2020-08-19 06:54:02,824 INFO L226 Difference]: Without dead ends: 3192 [2020-08-19 06:54:02,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:54:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-19 06:54:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-19 06:54:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-19 06:54:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3486 transitions. [2020-08-19 06:54:02,904 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3486 transitions. Word has length 591 [2020-08-19 06:54:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:54:02,905 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3486 transitions. [2020-08-19 06:54:02,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:54:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3486 transitions. [2020-08-19 06:54:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2020-08-19 06:54:02,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:54:02,915 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:54:02,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:54:02,916 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:54:02,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:54:02,916 INFO L82 PathProgramCache]: Analyzing trace with hash -278736799, now seen corresponding path program 2 times [2020-08-19 06:54:02,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:54:02,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895227146] [2020-08-19 06:54:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:54:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:03,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:54:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:03,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:54:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:03,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:54:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:03,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:54:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:03,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-19 06:54:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:03,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-19 06:54:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1384 backedges. 609 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-19 06:54:04,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895227146] [2020-08-19 06:54:04,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:54:04,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:54:04,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411919719] [2020-08-19 06:54:04,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:54:04,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:54:04,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:54:04,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:54:04,450 INFO L87 Difference]: Start difference. First operand 3178 states and 3486 transitions. Second operand 9 states. [2020-08-19 06:54:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:54:06,951 INFO L93 Difference]: Finished difference Result 6354 states and 6982 transitions. [2020-08-19 06:54:06,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:54:06,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 701 [2020-08-19 06:54:06,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:54:06,967 INFO L225 Difference]: With dead ends: 6354 [2020-08-19 06:54:06,967 INFO L226 Difference]: Without dead ends: 3364 [2020-08-19 06:54:06,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:54:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-19 06:54:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-19 06:54:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-19 06:54:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3484 transitions. [2020-08-19 06:54:07,047 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3484 transitions. Word has length 701 [2020-08-19 06:54:07,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:54:07,048 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3484 transitions. [2020-08-19 06:54:07,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:54:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3484 transitions. [2020-08-19 06:54:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-08-19 06:54:07,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:54:07,057 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:54:07,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:54:07,057 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:54:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:54:07,058 INFO L82 PathProgramCache]: Analyzing trace with hash -638310518, now seen corresponding path program 1 times [2020-08-19 06:54:07,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:54:07,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439307812] [2020-08-19 06:54:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:54:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:07,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:54:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:07,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:54:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:07,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:54:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:07,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:54:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:07,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 06:54:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:07,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-19 06:54:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 616 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-19 06:54:08,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439307812] [2020-08-19 06:54:08,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:54:08,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:54:08,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899106424] [2020-08-19 06:54:08,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:54:08,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:54:08,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:54:08,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:54:08,756 INFO L87 Difference]: Start difference. First operand 3178 states and 3484 transitions. Second operand 10 states. [2020-08-19 06:54:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:54:12,307 INFO L93 Difference]: Finished difference Result 6540 states and 7200 transitions. [2020-08-19 06:54:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 06:54:12,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 708 [2020-08-19 06:54:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:54:12,331 INFO L225 Difference]: With dead ends: 6540 [2020-08-19 06:54:12,331 INFO L226 Difference]: Without dead ends: 3552 [2020-08-19 06:54:12,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:54:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-19 06:54:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-19 06:54:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-19 06:54:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3869 transitions. [2020-08-19 06:54:12,414 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3869 transitions. Word has length 708 [2020-08-19 06:54:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:54:12,415 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3869 transitions. [2020-08-19 06:54:12,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:54:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3869 transitions. [2020-08-19 06:54:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2020-08-19 06:54:12,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:54:12,429 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:54:12,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:54:12,430 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:54:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:54:12,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1537329314, now seen corresponding path program 1 times [2020-08-19 06:54:12,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:54:12,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926848703] [2020-08-19 06:54:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:54:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:12,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:54:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:12,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:54:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:12,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:54:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:12,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:54:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:12,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 06:54:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:12,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-19 06:54:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 763 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-19 06:54:13,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926848703] [2020-08-19 06:54:13,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:54:13,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:54:13,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68365611] [2020-08-19 06:54:13,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:54:13,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:54:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:54:13,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:54:13,478 INFO L87 Difference]: Start difference. First operand 3548 states and 3869 transitions. Second operand 7 states. [2020-08-19 06:54:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:54:14,983 INFO L93 Difference]: Finished difference Result 8032 states and 8890 transitions. [2020-08-19 06:54:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:54:14,984 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 734 [2020-08-19 06:54:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:54:15,013 INFO L225 Difference]: With dead ends: 8032 [2020-08-19 06:54:15,014 INFO L226 Difference]: Without dead ends: 4674 [2020-08-19 06:54:15,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:54:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-19 06:54:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-19 06:54:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-19 06:54:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4750 transitions. [2020-08-19 06:54:15,128 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4750 transitions. Word has length 734 [2020-08-19 06:54:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:54:15,129 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4750 transitions. [2020-08-19 06:54:15,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:54:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4750 transitions. [2020-08-19 06:54:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2020-08-19 06:54:15,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:54:15,142 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:54:15,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:54:15,143 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:54:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:54:15,143 INFO L82 PathProgramCache]: Analyzing trace with hash -583849898, now seen corresponding path program 1 times [2020-08-19 06:54:15,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:54:15,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381355099] [2020-08-19 06:54:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:54:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:15,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:54:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:15,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:54:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:15,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:54:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:15,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:54:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:15,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 06:54:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:15,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-19 06:54:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:15,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-19 06:54:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 327 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-19 06:54:16,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381355099] [2020-08-19 06:54:16,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:54:16,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:54:16,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112473513] [2020-08-19 06:54:16,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:54:16,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:54:16,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:54:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:54:16,041 INFO L87 Difference]: Start difference. First operand 4292 states and 4750 transitions. Second operand 5 states. [2020-08-19 06:54:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:54:17,265 INFO L93 Difference]: Finished difference Result 4296 states and 4753 transitions. [2020-08-19 06:54:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:54:17,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 789 [2020-08-19 06:54:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:54:17,279 INFO L225 Difference]: With dead ends: 4296 [2020-08-19 06:54:17,279 INFO L226 Difference]: Without dead ends: 4294 [2020-08-19 06:54:17,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:54:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-19 06:54:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-19 06:54:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-19 06:54:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-19 06:54:17,390 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 789 [2020-08-19 06:54:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:54:17,391 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-19 06:54:17,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:54:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-19 06:54:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-08-19 06:54:17,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:54:17,406 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:54:17,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:54:17,407 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:54:17,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:54:17,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1874704500, now seen corresponding path program 1 times [2020-08-19 06:54:17,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:54:17,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608888631] [2020-08-19 06:54:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:54:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:17,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:54:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:17,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:54:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:17,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:54:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:17,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:54:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:17,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 06:54:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:17,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-19 06:54:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:17,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-19 06:54:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:17,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-19 06:54:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 382 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-19 06:54:18,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608888631] [2020-08-19 06:54:18,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:54:18,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:54:18,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987923929] [2020-08-19 06:54:18,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:54:18,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:54:18,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:54:18,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:54:18,345 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-19 06:54:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:54:19,633 INFO L93 Difference]: Finished difference Result 9128 states and 10168 transitions. [2020-08-19 06:54:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:54:19,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 834 [2020-08-19 06:54:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:54:19,648 INFO L225 Difference]: With dead ends: 9128 [2020-08-19 06:54:19,648 INFO L226 Difference]: Without dead ends: 5026 [2020-08-19 06:54:19,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:54:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2020-08-19 06:54:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3918. [2020-08-19 06:54:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3918 states. [2020-08-19 06:54:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 4287 transitions. [2020-08-19 06:54:19,733 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 4287 transitions. Word has length 834 [2020-08-19 06:54:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:54:19,734 INFO L479 AbstractCegarLoop]: Abstraction has 3918 states and 4287 transitions. [2020-08-19 06:54:19,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:54:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 4287 transitions. [2020-08-19 06:54:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-08-19 06:54:19,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:54:19,748 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:54:19,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:54:19,748 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:54:19,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:54:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash -177347705, now seen corresponding path program 1 times [2020-08-19 06:54:19,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:54:19,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098934277] [2020-08-19 06:54:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:54:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:20,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:54:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:20,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 06:54:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:20,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:54:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:20,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 06:54:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:20,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 06:54:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:20,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-19 06:54:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:20,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-19 06:54:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:20,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-19 06:54:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:54:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 379 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-19 06:54:20,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098934277] [2020-08-19 06:54:20,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:54:20,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:54:20,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818177057] [2020-08-19 06:54:20,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:54:20,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:54:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:54:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:54:20,654 INFO L87 Difference]: Start difference. First operand 3918 states and 4287 transitions. Second operand 8 states.