/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o100.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:19:38,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:19:38,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:19:38,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:19:38,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:19:38,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:19:38,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:19:38,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:19:38,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:19:38,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:19:38,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:19:38,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:19:38,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:19:38,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:19:38,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:19:38,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:19:38,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:19:38,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:19:38,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:19:38,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:19:38,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:19:38,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:19:38,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:19:38,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:19:38,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:19:38,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:19:38,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:19:38,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:19:38,535 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 [2020-09-21 10:19:38,585 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:19:38,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:19:38,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:19:38,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:19:38,595 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:19:38,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:19:38,596 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:19:38,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:19:38,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:19:38,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:19:38,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:19:38,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:19:38,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:19:38,599 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:19:38,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:19:38,599 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:19:38,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:19:38,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:19:38,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:19:38,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:19:38,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:19:38,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:19:38,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:19:38,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:19:38,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:19:38,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:19:38,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:19:38,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:19:38,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:19:38,602 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 -> false [2020-09-21 10:19:39,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:19:39,069 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:19:39,073 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:19:39,075 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:19:39,076 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:19:39,077 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o100.c [2020-09-21 10:19:39,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70dd195c8/0df4a45ced1c4afc95b4088284eda6d3/FLAG56fe6a8a0 [2020-09-21 10:19:39,698 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:19:39,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o100.c [2020-09-21 10:19:39,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70dd195c8/0df4a45ced1c4afc95b4088284eda6d3/FLAG56fe6a8a0 [2020-09-21 10:19:40,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70dd195c8/0df4a45ced1c4afc95b4088284eda6d3 [2020-09-21 10:19:40,071 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:19:40,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:19:40,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:19:40,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:19:40,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:19:40,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:19:40" (1/1) ... [2020-09-21 10:19:40,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321fecde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40, skipping insertion in model container [2020-09-21 10:19:40,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:19:40" (1/1) ... [2020-09-21 10:19:40,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:19:40,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:19:40,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:19:40,321 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:19:40,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:19:40,350 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:19:40,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40 WrapperNode [2020-09-21 10:19:40,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:19:40,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:19:40,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:19:40,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:19:40,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40" (1/1) ... [2020-09-21 10:19:40,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40" (1/1) ... [2020-09-21 10:19:40,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40" (1/1) ... [2020-09-21 10:19:40,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40" (1/1) ... [2020-09-21 10:19:40,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40" (1/1) ... [2020-09-21 10:19:40,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40" (1/1) ... [2020-09-21 10:19:40,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40" (1/1) ... [2020-09-21 10:19:40,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:19:40,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:19:40,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:19:40,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:19:40,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40" (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 [2020-09-21 10:19:40,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:19:40,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:19:40,535 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-21 10:19:40,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:19:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 10:19:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:19:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-21 10:19:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:19:40,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:19:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:19:40,701 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:19:40,702 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:19:40,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:19:40 BoogieIcfgContainer [2020-09-21 10:19:40,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:19:40,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:19:40,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:19:40,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:19:40,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:19:40" (1/3) ... [2020-09-21 10:19:40,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672b8dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:19:40, skipping insertion in model container [2020-09-21 10:19:40,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:40" (2/3) ... [2020-09-21 10:19:40,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672b8dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:19:40, skipping insertion in model container [2020-09-21 10:19:40,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:19:40" (3/3) ... [2020-09-21 10:19:40,717 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o100.c [2020-09-21 10:19:40,725 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:19:40,733 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:19:40,755 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:19:40,785 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:19:40,785 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:19:40,786 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:19:40,786 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:19:40,786 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:19:40,786 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:19:40,786 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:19:40,787 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:19:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 10:19:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:19:40,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:40,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:40,814 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:40,820 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-09-21 10:19:40,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:40,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612404581] [2020-09-21 10:19:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,136 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-09-21 10:19:41,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:19:41,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612404581] [2020-09-21 10:19:41,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:19:41,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:19:41,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501119797] [2020-09-21 10:19:41,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:19:41,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:41,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:19:41,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:41,255 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-21 10:19:41,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:41,308 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-09-21 10:19:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:19:41,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 10:19:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:41,323 INFO L225 Difference]: With dead ends: 32 [2020-09-21 10:19:41,324 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 10:19:41,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 10:19:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 10:19:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 10:19:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 10:19:41,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-21 10:19:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:41,372 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 10:19:41,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:19:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 10:19:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:19:41,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:41,374 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:41,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:19:41,375 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:41,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:41,376 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-09-21 10:19:41,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:41,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872569966] [2020-09-21 10:19:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:19:41,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872569966] [2020-09-21 10:19:41,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:41,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:19:41,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351446692] [2020-09-21 10:19:41,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:19:41,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:41,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:19:41,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:19:41,573 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-09-21 10:19:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:41,602 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-21 10:19:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:19:41,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-21 10:19:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:41,604 INFO L225 Difference]: With dead ends: 25 [2020-09-21 10:19:41,604 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:19:41,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:19:41,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:19:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 10:19:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 10:19:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-21 10:19:41,613 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-21 10:19:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:41,613 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-21 10:19:41,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:19:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-21 10:19:41,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:19:41,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:41,615 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:41,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:19:41,616 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:41,616 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-09-21 10:19:41,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:41,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512222348] [2020-09-21 10:19:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 10:19:41,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512222348] [2020-09-21 10:19:41,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:41,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:19:41,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559385119] [2020-09-21 10:19:41,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:19:41,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:41,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:19:41,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:19:41,857 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-09-21 10:19:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:41,900 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-21 10:19:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:19:41,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-21 10:19:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:41,903 INFO L225 Difference]: With dead ends: 28 [2020-09-21 10:19:41,903 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 10:19:41,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:19:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 10:19:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 10:19:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 10:19:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-21 10:19:41,911 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-21 10:19:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:41,912 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-21 10:19:41,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:19:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-21 10:19:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:19:41,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:41,914 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:41,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:19:41,914 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-09-21 10:19:41,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:41,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316059246] [2020-09-21 10:19:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:41,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 10:19:42,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316059246] [2020-09-21 10:19:42,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:42,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:19:42,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132302472] [2020-09-21 10:19:42,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:19:42,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:19:42,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:19:42,192 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-09-21 10:19:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:42,249 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-21 10:19:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:19:42,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-09-21 10:19:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:42,251 INFO L225 Difference]: With dead ends: 31 [2020-09-21 10:19:42,251 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 10:19:42,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:19:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 10:19:42,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-21 10:19:42,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 10:19:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-21 10:19:42,259 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-21 10:19:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:42,259 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-21 10:19:42,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:19:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-21 10:19:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 10:19:42,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:42,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:42,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:19:42,262 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:42,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-09-21 10:19:42,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:42,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50919958] [2020-09-21 10:19:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-21 10:19:42,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50919958] [2020-09-21 10:19:42,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:42,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:19:42,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184076989] [2020-09-21 10:19:42,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:19:42,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:19:42,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:19:42,565 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-09-21 10:19:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:42,638 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-21 10:19:42,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:19:42,639 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-09-21 10:19:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:42,641 INFO L225 Difference]: With dead ends: 34 [2020-09-21 10:19:42,641 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 10:19:42,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:19:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 10:19:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-21 10:19:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:19:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-21 10:19:42,648 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-21 10:19:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:42,648 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-21 10:19:42,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:19:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-21 10:19:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 10:19:42,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:42,650 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:42,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:19:42,651 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-09-21 10:19:42,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:42,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771999045] [2020-09-21 10:19:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:42,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-21 10:19:43,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771999045] [2020-09-21 10:19:43,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:43,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:19:43,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765063499] [2020-09-21 10:19:43,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:19:43,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:43,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:19:43,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:19:43,021 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-09-21 10:19:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:43,132 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-09-21 10:19:43,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:19:43,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-09-21 10:19:43,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:43,134 INFO L225 Difference]: With dead ends: 37 [2020-09-21 10:19:43,135 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 10:19:43,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:19:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 10:19:43,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-21 10:19:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 10:19:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-21 10:19:43,146 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-09-21 10:19:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:43,147 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-21 10:19:43,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:19:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-21 10:19:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 10:19:43,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:43,151 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:43,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:19:43,155 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:43,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:43,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-09-21 10:19:43,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:43,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852087476] [2020-09-21 10:19:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-21 10:19:43,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852087476] [2020-09-21 10:19:43,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:43,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 10:19:43,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262674577] [2020-09-21 10:19:43,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 10:19:43,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:43,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 10:19:43,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:19:43,614 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-09-21 10:19:43,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:43,764 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-09-21 10:19:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 10:19:43,765 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-09-21 10:19:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:43,766 INFO L225 Difference]: With dead ends: 40 [2020-09-21 10:19:43,769 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 10:19:43,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:19:43,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 10:19:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-21 10:19:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 10:19:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-21 10:19:43,784 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-09-21 10:19:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:43,786 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-21 10:19:43,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 10:19:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-21 10:19:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 10:19:43,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:43,790 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:43,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:19:43,791 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:43,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-09-21 10:19:43,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:43,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300567354] [2020-09-21 10:19:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:43,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-21 10:19:44,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300567354] [2020-09-21 10:19:44,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:44,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 10:19:44,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153703760] [2020-09-21 10:19:44,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 10:19:44,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:44,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 10:19:44,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:19:44,336 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-09-21 10:19:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:44,485 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-21 10:19:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:19:44,485 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-09-21 10:19:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:44,487 INFO L225 Difference]: With dead ends: 43 [2020-09-21 10:19:44,487 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 10:19:44,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:19:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 10:19:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-21 10:19:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 10:19:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-21 10:19:44,494 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-09-21 10:19:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:44,494 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-21 10:19:44,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 10:19:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-21 10:19:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 10:19:44,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:44,496 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:44,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:19:44,496 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-09-21 10:19:44,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:44,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107427792] [2020-09-21 10:19:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:44,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-21 10:19:45,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107427792] [2020-09-21 10:19:45,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:45,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 10:19:45,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569142525] [2020-09-21 10:19:45,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 10:19:45,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:45,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 10:19:45,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:19:45,052 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-09-21 10:19:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:45,224 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-21 10:19:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 10:19:45,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-09-21 10:19:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:45,226 INFO L225 Difference]: With dead ends: 46 [2020-09-21 10:19:45,226 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 10:19:45,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:19:45,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 10:19:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-21 10:19:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:19:45,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-21 10:19:45,233 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-09-21 10:19:45,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:45,233 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-21 10:19:45,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 10:19:45,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-21 10:19:45,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-21 10:19:45,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:45,235 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:45,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:19:45,235 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:45,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-09-21 10:19:45,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:45,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205713284] [2020-09-21 10:19:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-21 10:19:45,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205713284] [2020-09-21 10:19:45,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:45,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 10:19:45,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226111454] [2020-09-21 10:19:45,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 10:19:45,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 10:19:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:19:45,927 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-09-21 10:19:46,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:46,189 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-21 10:19:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 10:19:46,190 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-09-21 10:19:46,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:46,191 INFO L225 Difference]: With dead ends: 49 [2020-09-21 10:19:46,191 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 10:19:46,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:19:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 10:19:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-21 10:19:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:19:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-21 10:19:46,198 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-09-21 10:19:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:46,199 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-21 10:19:46,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 10:19:46,199 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-21 10:19:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-21 10:19:46,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:46,200 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:46,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:19:46,200 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:46,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-09-21 10:19:46,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:46,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078150490] [2020-09-21 10:19:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-09-21 10:19:46,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078150490] [2020-09-21 10:19:46,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:46,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 10:19:46,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127992155] [2020-09-21 10:19:46,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 10:19:46,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:46,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 10:19:46,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:19:46,976 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-09-21 10:19:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:47,255 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-09-21 10:19:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 10:19:47,256 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-09-21 10:19:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:47,257 INFO L225 Difference]: With dead ends: 52 [2020-09-21 10:19:47,257 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 10:19:47,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:19:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 10:19:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-21 10:19:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 10:19:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-09-21 10:19:47,271 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-09-21 10:19:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:47,271 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-09-21 10:19:47,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 10:19:47,271 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-09-21 10:19:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 10:19:47,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:47,274 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:47,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:19:47,274 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:47,275 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-09-21 10:19:47,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:47,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70743744] [2020-09-21 10:19:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:47,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:47,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:47,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:47,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:47,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:47,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:47,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:47,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:47,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:47,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-09-21 10:19:48,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70743744] [2020-09-21 10:19:48,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:48,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 10:19:48,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170126414] [2020-09-21 10:19:48,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 10:19:48,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:48,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 10:19:48,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:19:48,225 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-09-21 10:19:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:48,532 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-21 10:19:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 10:19:48,532 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-09-21 10:19:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:48,533 INFO L225 Difference]: With dead ends: 55 [2020-09-21 10:19:48,534 INFO L226 Difference]: Without dead ends: 51 [2020-09-21 10:19:48,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:19:48,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-21 10:19:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-21 10:19:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-21 10:19:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-21 10:19:48,540 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-09-21 10:19:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:48,541 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-21 10:19:48,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 10:19:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-21 10:19:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-21 10:19:48,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:48,542 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:48,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:19:48,543 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-09-21 10:19:48,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:48,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280752862] [2020-09-21 10:19:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:48,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:49,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:49,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:49,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:49,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:49,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:49,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-09-21 10:19:49,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280752862] [2020-09-21 10:19:49,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:49,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 10:19:49,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869672203] [2020-09-21 10:19:49,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 10:19:49,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:49,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 10:19:49,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-09-21 10:19:49,587 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-09-21 10:19:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:49,928 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-09-21 10:19:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-21 10:19:49,929 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-09-21 10:19:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:49,930 INFO L225 Difference]: With dead ends: 58 [2020-09-21 10:19:49,930 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 10:19:49,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-09-21 10:19:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 10:19:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-09-21 10:19:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 10:19:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-21 10:19:49,944 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-09-21 10:19:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:49,946 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-21 10:19:49,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 10:19:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-21 10:19:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 10:19:49,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:49,947 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:49,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:19:49,948 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:49,948 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-09-21 10:19:49,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:49,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638741425] [2020-09-21 10:19:49,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:50,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:51,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-09-21 10:19:51,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638741425] [2020-09-21 10:19:51,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:51,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-21 10:19:51,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162002892] [2020-09-21 10:19:51,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-21 10:19:51,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:51,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-21 10:19:51,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-09-21 10:19:51,126 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-09-21 10:19:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:51,509 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-09-21 10:19:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-21 10:19:51,510 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-09-21 10:19:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:51,511 INFO L225 Difference]: With dead ends: 61 [2020-09-21 10:19:51,511 INFO L226 Difference]: Without dead ends: 57 [2020-09-21 10:19:51,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-09-21 10:19:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-21 10:19:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-21 10:19:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 10:19:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-09-21 10:19:51,518 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-09-21 10:19:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:51,518 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-09-21 10:19:51,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-21 10:19:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-09-21 10:19:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-21 10:19:51,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:51,520 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:51,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:19:51,520 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-09-21 10:19:51,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:51,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472819028] [2020-09-21 10:19:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:51,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:51,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:51,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:51,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:51,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:51,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:51,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:52,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:52,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:52,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:52,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:52,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:52,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:52,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:52,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:52,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-09-21 10:19:52,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472819028] [2020-09-21 10:19:52,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:52,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-21 10:19:52,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874329150] [2020-09-21 10:19:52,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-21 10:19:52,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:52,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-21 10:19:52,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 10:19:52,857 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-09-21 10:19:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:53,352 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-21 10:19:53,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-21 10:19:53,353 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-09-21 10:19:53,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:53,354 INFO L225 Difference]: With dead ends: 64 [2020-09-21 10:19:53,354 INFO L226 Difference]: Without dead ends: 60 [2020-09-21 10:19:53,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 10:19:53,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-21 10:19:53,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-21 10:19:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-21 10:19:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-21 10:19:53,360 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-09-21 10:19:53,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:53,360 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-21 10:19:53,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-21 10:19:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-21 10:19:53,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-21 10:19:53,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:53,362 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:53,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:19:53,362 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:53,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-09-21 10:19:53,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:53,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965110790] [2020-09-21 10:19:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:53,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:53,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:53,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:53,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:53,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:53,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:53,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:53,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:53,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:54,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:54,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:54,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:54,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:54,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:54,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:54,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:54,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-09-21 10:19:54,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965110790] [2020-09-21 10:19:54,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:54,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-21 10:19:54,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535185685] [2020-09-21 10:19:54,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-21 10:19:54,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:54,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-21 10:19:54,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 10:19:54,775 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-09-21 10:19:55,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:55,317 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-09-21 10:19:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-21 10:19:55,317 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-09-21 10:19:55,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:55,319 INFO L225 Difference]: With dead ends: 67 [2020-09-21 10:19:55,319 INFO L226 Difference]: Without dead ends: 63 [2020-09-21 10:19:55,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 10:19:55,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-21 10:19:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-09-21 10:19:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 10:19:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-21 10:19:55,324 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-09-21 10:19:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:55,325 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-21 10:19:55,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-21 10:19:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-21 10:19:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-21 10:19:55,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:55,327 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:55,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:19:55,327 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:55,327 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-09-21 10:19:55,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:55,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125944509] [2020-09-21 10:19:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:55,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:55,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:55,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:55,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:55,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:55,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:55,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:55,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:55,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:56,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:56,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:56,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:56,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:56,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:56,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:56,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:56,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:56,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-09-21 10:19:56,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125944509] [2020-09-21 10:19:56,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:56,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-21 10:19:56,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910265167] [2020-09-21 10:19:56,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-21 10:19:56,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:56,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-21 10:19:56,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:19:56,928 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-09-21 10:19:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:57,613 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-09-21 10:19:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-21 10:19:57,617 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-09-21 10:19:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:57,618 INFO L225 Difference]: With dead ends: 70 [2020-09-21 10:19:57,618 INFO L226 Difference]: Without dead ends: 66 [2020-09-21 10:19:57,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:19:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-21 10:19:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-21 10:19:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-21 10:19:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-09-21 10:19:57,625 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-09-21 10:19:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:57,626 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-09-21 10:19:57,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-21 10:19:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-09-21 10:19:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-21 10:19:57,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:57,627 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:57,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:19:57,628 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-09-21 10:19:57,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:57,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42182162] [2020-09-21 10:19:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:57,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:57,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:57,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:57,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:57,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:57,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:58,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:58,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:58,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:58,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:58,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:58,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:58,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:58,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:58,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:59,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:59,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:59,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:59,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-09-21 10:19:59,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42182162] [2020-09-21 10:19:59,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:59,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-21 10:19:59,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738013520] [2020-09-21 10:19:59,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-21 10:19:59,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:59,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-21 10:19:59,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-09-21 10:19:59,447 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-09-21 10:20:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:00,223 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-09-21 10:20:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-21 10:20:00,223 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-09-21 10:20:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:00,224 INFO L225 Difference]: With dead ends: 73 [2020-09-21 10:20:00,225 INFO L226 Difference]: Without dead ends: 69 [2020-09-21 10:20:00,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-09-21 10:20:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-21 10:20:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-09-21 10:20:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-21 10:20:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-09-21 10:20:00,239 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-09-21 10:20:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:00,239 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-09-21 10:20:00,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-21 10:20:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-09-21 10:20:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-21 10:20:00,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:00,241 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:00,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:20:00,241 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:00,242 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-09-21 10:20:00,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:00,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182775045] [2020-09-21 10:20:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:00,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:00,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:00,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:00,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:00,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:00,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:00,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:00,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:00,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:00,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:01,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:01,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:01,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:01,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:01,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:01,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:01,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:01,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:01,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:02,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-09-21 10:20:02,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182775045] [2020-09-21 10:20:02,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:20:02,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-21 10:20:02,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416953445] [2020-09-21 10:20:02,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-21 10:20:02,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:02,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-21 10:20:02,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-09-21 10:20:02,174 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-09-21 10:20:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:03,084 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-09-21 10:20:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-21 10:20:03,085 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-09-21 10:20:03,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:03,087 INFO L225 Difference]: With dead ends: 76 [2020-09-21 10:20:03,087 INFO L226 Difference]: Without dead ends: 72 [2020-09-21 10:20:03,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-09-21 10:20:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-21 10:20:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-09-21 10:20:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-21 10:20:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-09-21 10:20:03,092 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-09-21 10:20:03,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:03,093 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-09-21 10:20:03,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-21 10:20:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-09-21 10:20:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-21 10:20:03,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:03,094 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:03,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:20:03,094 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:03,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:03,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-09-21 10:20:03,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:03,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141201811] [2020-09-21 10:20:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:03,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:03,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:03,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:03,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:03,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:03,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:03,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:03,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:03,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:03,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:04,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:04,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:04,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:04,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:04,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:04,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:04,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:04,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:04,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:05,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:05,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-09-21 10:20:05,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141201811] [2020-09-21 10:20:05,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:20:05,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-21 10:20:05,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000060754] [2020-09-21 10:20:05,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-21 10:20:05,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:05,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-21 10:20:05,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-09-21 10:20:05,366 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-09-21 10:20:06,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:06,233 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-09-21 10:20:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-21 10:20:06,233 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-09-21 10:20:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:06,234 INFO L225 Difference]: With dead ends: 79 [2020-09-21 10:20:06,234 INFO L226 Difference]: Without dead ends: 75 [2020-09-21 10:20:06,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-09-21 10:20:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-21 10:20:06,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-09-21 10:20:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-21 10:20:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-09-21 10:20:06,244 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-09-21 10:20:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:06,248 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-09-21 10:20:06,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-21 10:20:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-09-21 10:20:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-21 10:20:06,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:06,250 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:06,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:20:06,250 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:06,250 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-09-21 10:20:06,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:06,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655143156] [2020-09-21 10:20:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:06,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:06,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:06,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:06,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:06,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:06,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:06,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:06,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:06,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:07,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:07,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:07,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:07,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:07,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:07,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:07,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:07,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:07,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:08,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:08,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:08,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:08,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-09-21 10:20:08,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655143156] [2020-09-21 10:20:08,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:20:08,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-21 10:20:08,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596391209] [2020-09-21 10:20:08,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-21 10:20:08,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:08,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-21 10:20:08,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-09-21 10:20:08,581 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-09-21 10:20:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:09,630 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-09-21 10:20:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-21 10:20:09,630 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-09-21 10:20:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:09,632 INFO L225 Difference]: With dead ends: 82 [2020-09-21 10:20:09,632 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 10:20:09,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-09-21 10:20:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 10:20:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-09-21 10:20:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-21 10:20:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-09-21 10:20:09,638 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-09-21 10:20:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:09,638 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-09-21 10:20:09,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-21 10:20:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-09-21 10:20:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-21 10:20:09,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:09,640 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:09,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:20:09,640 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:09,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-09-21 10:20:09,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:09,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646176741] [2020-09-21 10:20:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:09,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:09,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:09,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:09,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:10,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:10,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:10,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:10,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:10,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:10,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:10,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:10,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:10,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:10,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:11,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:11,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:11,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:11,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:11,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:11,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:11,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:11,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:12,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-09-21 10:20:12,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646176741] [2020-09-21 10:20:12,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:20:12,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-09-21 10:20:12,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645830819] [2020-09-21 10:20:12,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-21 10:20:12,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:12,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-21 10:20:12,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-09-21 10:20:12,320 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 47 states. [2020-09-21 10:20:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:13,434 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-09-21 10:20:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-21 10:20:13,437 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-09-21 10:20:13,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:13,438 INFO L225 Difference]: With dead ends: 85 [2020-09-21 10:20:13,438 INFO L226 Difference]: Without dead ends: 81 [2020-09-21 10:20:13,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-09-21 10:20:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-21 10:20:13,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-09-21 10:20:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 10:20:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-21 10:20:13,444 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-09-21 10:20:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:13,444 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-21 10:20:13,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-21 10:20:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-21 10:20:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-21 10:20:13,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:13,446 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:13,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 10:20:13,446 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:13,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:13,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-09-21 10:20:13,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:13,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294440762] [2020-09-21 10:20:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:13,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:13,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:13,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:13,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:13,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:13,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:14,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:14,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:14,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:14,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:14,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:14,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:14,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:14,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:14,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:14,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:15,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:15,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:15,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:15,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:15,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:15,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:15,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:16,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-09-21 10:20:16,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294440762] [2020-09-21 10:20:16,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:20:16,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-09-21 10:20:16,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946882860] [2020-09-21 10:20:16,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-21 10:20:16,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:16,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-21 10:20:16,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-09-21 10:20:16,234 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 49 states. [2020-09-21 10:20:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:17,397 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-09-21 10:20:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-21 10:20:17,398 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-09-21 10:20:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:17,399 INFO L225 Difference]: With dead ends: 88 [2020-09-21 10:20:17,399 INFO L226 Difference]: Without dead ends: 84 [2020-09-21 10:20:17,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-09-21 10:20:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-21 10:20:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-09-21 10:20:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-21 10:20:17,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-21 10:20:17,413 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-09-21 10:20:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:17,413 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-21 10:20:17,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-21 10:20:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-21 10:20:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-21 10:20:17,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:17,416 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:17,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 10:20:17,416 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-09-21 10:20:17,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:17,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831870755] [2020-09-21 10:20:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:17,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:17,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:17,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:17,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:17,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:17,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:17,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:18,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:18,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:18,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:18,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:18,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:18,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:18,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:18,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:18,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:19,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:19,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:19,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:19,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:19,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:19,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:19,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:19,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:20,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-09-21 10:20:20,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831870755] [2020-09-21 10:20:20,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:20:20,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-09-21 10:20:20,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303757503] [2020-09-21 10:20:20,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-09-21 10:20:20,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-09-21 10:20:20,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-09-21 10:20:20,353 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 51 states. [2020-09-21 10:20:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:21,687 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-09-21 10:20:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-21 10:20:21,688 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-09-21 10:20:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:21,690 INFO L225 Difference]: With dead ends: 91 [2020-09-21 10:20:21,690 INFO L226 Difference]: Without dead ends: 87 [2020-09-21 10:20:21,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-09-21 10:20:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-21 10:20:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-09-21 10:20:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-21 10:20:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-09-21 10:20:21,696 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-09-21 10:20:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:21,696 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-09-21 10:20:21,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-09-21 10:20:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-09-21 10:20:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-21 10:20:21,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:21,701 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:21,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 10:20:21,702 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:21,702 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-09-21 10:20:21,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:21,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966548797] [2020-09-21 10:20:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:21,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:21,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:21,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:21,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:22,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:23,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:23,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:23,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:23,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:23,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:23,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:23,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:23,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:24,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:24,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:24,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:24,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-09-21 10:20:24,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966548797] [2020-09-21 10:20:24,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:20:24,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-09-21 10:20:24,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886742803] [2020-09-21 10:20:24,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-21 10:20:24,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:24,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-21 10:20:24,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-09-21 10:20:24,858 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 53 states. [2020-09-21 10:20:26,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:26,306 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-09-21 10:20:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-21 10:20:26,307 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2020-09-21 10:20:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:26,309 INFO L225 Difference]: With dead ends: 94 [2020-09-21 10:20:26,309 INFO L226 Difference]: Without dead ends: 90 [2020-09-21 10:20:26,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-09-21 10:20:26,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-21 10:20:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-09-21 10:20:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-21 10:20:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-09-21 10:20:26,315 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-09-21 10:20:26,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:26,316 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-09-21 10:20:26,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-21 10:20:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-09-21 10:20:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-21 10:20:26,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:26,317 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:26,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 10:20:26,317 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-09-21 10:20:26,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:26,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227286200] [2020-09-21 10:20:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:26,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:27,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:27,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:27,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:27,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:27,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:27,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:27,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:27,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:27,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:28,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:29,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:29,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:29,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-09-21 10:20:29,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227286200] [2020-09-21 10:20:29,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:20:29,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-09-21 10:20:29,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090763733] [2020-09-21 10:20:29,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-09-21 10:20:29,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:29,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-09-21 10:20:29,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-09-21 10:20:29,702 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-09-21 10:20:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:31,378 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-09-21 10:20:31,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-21 10:20:31,379 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-09-21 10:20:31,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:31,381 INFO L225 Difference]: With dead ends: 97 [2020-09-21 10:20:31,381 INFO L226 Difference]: Without dead ends: 93 [2020-09-21 10:20:31,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-09-21 10:20:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-21 10:20:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-09-21 10:20:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-21 10:20:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-09-21 10:20:31,395 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-09-21 10:20:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:31,397 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-09-21 10:20:31,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-09-21 10:20:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-09-21 10:20:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-21 10:20:31,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:31,401 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:31,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 10:20:31,401 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-09-21 10:20:31,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:31,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79004527] [2020-09-21 10:20:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:20:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:31,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:32,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:33,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:20:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat