/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/eca-rers2012/Problem14_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:25:49,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:25:49,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:25:49,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:25:49,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:25:49,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:25:49,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:25:49,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:25:49,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:25:49,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:25:49,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:25:49,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:25:49,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:25:49,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:25:49,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:25:49,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:25:49,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:25:49,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:25:49,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:25:49,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:25:49,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:25:49,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:25:49,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:25:49,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:25:49,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:25:49,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:25:49,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:25:49,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:25:49,226 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 10:25:49,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:25:49,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:25:49,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:25:49,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:25:49,255 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:25:49,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:25:49,256 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:25:49,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:25:49,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:25:49,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:25:49,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:25:49,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:25:49,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:25:49,257 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:25:49,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:25:49,258 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:25:49,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:25:49,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:25:49,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:25:49,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:25:49,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:25:49,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:25:49,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:25:49,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:25:49,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:25:49,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:25:49,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:25:49,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:25:49,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:25:49,261 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 10:25:49,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:25:49,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:25:49,800 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:25:49,802 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:25:49,802 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:25:49,804 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-09-21 10:25:49,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53758d8e7/2d728e8acaa646a3b800616f073b7ec7/FLAG74c13cbfe [2020-09-21 10:25:50,538 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:25:50,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-09-21 10:25:50,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53758d8e7/2d728e8acaa646a3b800616f073b7ec7/FLAG74c13cbfe [2020-09-21 10:25:50,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53758d8e7/2d728e8acaa646a3b800616f073b7ec7 [2020-09-21 10:25:50,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:25:50,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:25:50,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:25:50,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:25:50,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:25:50,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:25:50" (1/1) ... [2020-09-21 10:25:50,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3705ef2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:50, skipping insertion in model container [2020-09-21 10:25:50,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:25:50" (1/1) ... [2020-09-21 10:25:50,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:25:50,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:25:51,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:25:51,524 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:25:51,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:25:51,767 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:25:51,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:51 WrapperNode [2020-09-21 10:25:51,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:25:51,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:25:51,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:25:51,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:25:51,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:51" (1/1) ... [2020-09-21 10:25:51,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:51" (1/1) ... [2020-09-21 10:25:51,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:51" (1/1) ... [2020-09-21 10:25:51,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:51" (1/1) ... [2020-09-21 10:25:51,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:51" (1/1) ... [2020-09-21 10:25:51,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:51" (1/1) ... [2020-09-21 10:25:51,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:51" (1/1) ... [2020-09-21 10:25:51,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:25:51,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:25:51,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:25:51,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:25:51,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:51" (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 10:25:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:25:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:25:52,041 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-21 10:25:52,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:25:52,041 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-21 10:25:52,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:25:52,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:25:52,043 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 10:25:52,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:25:52,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:25:52,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:25:53,801 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:25:53,801 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:25:53,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:25:53 BoogieIcfgContainer [2020-09-21 10:25:53,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:25:53,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:25:53,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:25:53,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:25:53,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:25:50" (1/3) ... [2020-09-21 10:25:53,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5031ded6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:25:53, skipping insertion in model container [2020-09-21 10:25:53,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:51" (2/3) ... [2020-09-21 10:25:53,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5031ded6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:25:53, skipping insertion in model container [2020-09-21 10:25:53,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:25:53" (3/3) ... [2020-09-21 10:25:53,821 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2020-09-21 10:25:53,833 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:25:53,845 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:25:53,872 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:25:53,911 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:25:53,911 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:25:53,911 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:25:53,911 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:25:53,911 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:25:53,912 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:25:53,912 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:25:53,912 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:25:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-09-21 10:25:53,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 10:25:53,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:53,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:53,961 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:53,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:53,970 INFO L82 PathProgramCache]: Analyzing trace with hash -184228989, now seen corresponding path program 1 times [2020-09-21 10:25:53,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:53,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816925195] [2020-09-21 10:25:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:54,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:54,438 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 10:25:54,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816925195] [2020-09-21 10:25:54,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:25:54,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:25:54,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842673359] [2020-09-21 10:25:54,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:25:54,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:54,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:25:54,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:25:54,474 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-09-21 10:25:57,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:57,662 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-09-21 10:25:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:25:57,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-09-21 10:25:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:57,692 INFO L225 Difference]: With dead ends: 886 [2020-09-21 10:25:57,692 INFO L226 Difference]: Without dead ends: 564 [2020-09-21 10:25:57,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:25:57,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-09-21 10:25:57,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-09-21 10:25:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-09-21 10:25:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-09-21 10:25:57,821 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 60 [2020-09-21 10:25:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:57,822 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-09-21 10:25:57,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:25:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-09-21 10:25:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-21 10:25:57,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:57,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:57,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:25:57,832 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2117260534, now seen corresponding path program 1 times [2020-09-21 10:25:57,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:57,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116066292] [2020-09-21 10:25:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:58,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:58,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:25:58,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116066292] [2020-09-21 10:25:58,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:25:58,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:25:58,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105184184] [2020-09-21 10:25:58,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:25:58,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:25:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:25:58,221 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-09-21 10:26:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:00,629 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-09-21 10:26:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:26:00,630 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-09-21 10:26:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:00,644 INFO L225 Difference]: With dead ends: 1518 [2020-09-21 10:26:00,644 INFO L226 Difference]: Without dead ends: 964 [2020-09-21 10:26:00,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:26:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-09-21 10:26:00,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-09-21 10:26:00,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-09-21 10:26:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-09-21 10:26:00,720 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 154 [2020-09-21 10:26:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:00,721 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-09-21 10:26:00,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:26:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-09-21 10:26:00,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-21 10:26:00,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:00,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:00,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:26:00,729 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1698067270, now seen corresponding path program 1 times [2020-09-21 10:26:00,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:00,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241149101] [2020-09-21 10:26:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:00,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:00,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:26:01,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241149101] [2020-09-21 10:26:01,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:26:01,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:26:01,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221856692] [2020-09-21 10:26:01,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:26:01,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:01,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:26:01,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:26:01,183 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-09-21 10:26:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:03,338 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-09-21 10:26:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:26:03,340 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-09-21 10:26:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:03,355 INFO L225 Difference]: With dead ends: 2490 [2020-09-21 10:26:03,355 INFO L226 Difference]: Without dead ends: 1552 [2020-09-21 10:26:03,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:26:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-09-21 10:26:03,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-09-21 10:26:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-09-21 10:26:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-09-21 10:26:03,449 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 200 [2020-09-21 10:26:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:03,450 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-09-21 10:26:03,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:26:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-09-21 10:26:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-21 10:26:03,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:03,465 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:03,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:26:03,465 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash 328652488, now seen corresponding path program 1 times [2020-09-21 10:26:03,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:03,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762968555] [2020-09-21 10:26:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:03,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:03,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:03,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-21 10:26:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 106 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 10:26:03,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762968555] [2020-09-21 10:26:03,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:03,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:26:03,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476447369] [2020-09-21 10:26:03,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:26:03,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:03,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:26:03,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:26:03,902 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-09-21 10:26:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:05,828 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-09-21 10:26:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:26:05,829 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2020-09-21 10:26:05,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:05,840 INFO L225 Difference]: With dead ends: 3412 [2020-09-21 10:26:05,840 INFO L226 Difference]: Without dead ends: 1900 [2020-09-21 10:26:05,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:26:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-09-21 10:26:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-09-21 10:26:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-09-21 10:26:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-09-21 10:26:05,900 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 219 [2020-09-21 10:26:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:05,901 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-09-21 10:26:05,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:26:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-09-21 10:26:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-09-21 10:26:05,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:05,908 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:05,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:26:05,909 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash -56962879, now seen corresponding path program 1 times [2020-09-21 10:26:05,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:05,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912359256] [2020-09-21 10:26:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 10:26:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-09-21 10:26:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 193 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 10:26:06,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912359256] [2020-09-21 10:26:06,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:06,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:26:06,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894379367] [2020-09-21 10:26:06,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:26:06,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:26:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:26:06,813 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-09-21 10:26:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:09,863 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-09-21 10:26:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:26:09,864 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 303 [2020-09-21 10:26:09,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:09,874 INFO L225 Difference]: With dead ends: 3677 [2020-09-21 10:26:09,875 INFO L226 Difference]: Without dead ends: 1930 [2020-09-21 10:26:09,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:26:09,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-09-21 10:26:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-09-21 10:26:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-09-21 10:26:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-09-21 10:26:09,934 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 303 [2020-09-21 10:26:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:09,936 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-09-21 10:26:09,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:26:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-09-21 10:26:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-09-21 10:26:09,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:09,976 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:09,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:26:09,977 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash -48667167, now seen corresponding path program 1 times [2020-09-21 10:26:09,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:09,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890443994] [2020-09-21 10:26:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-09-21 10:26:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 438 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-09-21 10:26:10,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890443994] [2020-09-21 10:26:10,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:10,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:26:10,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254099323] [2020-09-21 10:26:10,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:26:10,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:10,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:26:10,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:26:10,689 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-09-21 10:26:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:16,208 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-09-21 10:26:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:26:16,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 438 [2020-09-21 10:26:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:16,225 INFO L225 Difference]: With dead ends: 5238 [2020-09-21 10:26:16,226 INFO L226 Difference]: Without dead ends: 3356 [2020-09-21 10:26:16,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:26:16,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-09-21 10:26:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-09-21 10:26:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-09-21 10:26:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-09-21 10:26:16,301 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 438 [2020-09-21 10:26:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:16,302 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-09-21 10:26:16,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:26:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-09-21 10:26:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-09-21 10:26:16,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:16,317 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:16,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:26:16,318 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:16,318 INFO L82 PathProgramCache]: Analyzing trace with hash -347726080, now seen corresponding path program 1 times [2020-09-21 10:26:16,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:16,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995612394] [2020-09-21 10:26:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:16,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:16,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:16,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:16,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:16,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-09-21 10:26:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:17,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-09-21 10:26:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 668 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-09-21 10:26:17,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995612394] [2020-09-21 10:26:17,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:17,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:26:17,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245887095] [2020-09-21 10:26:17,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:26:17,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:17,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:26:17,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:26:17,615 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-09-21 10:26:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:21,388 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-09-21 10:26:21,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:26:21,389 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 558 [2020-09-21 10:26:21,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:21,403 INFO L225 Difference]: With dead ends: 5701 [2020-09-21 10:26:21,403 INFO L226 Difference]: Without dead ends: 3400 [2020-09-21 10:26:21,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:26:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-09-21 10:26:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-09-21 10:26:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-09-21 10:26:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3495 transitions. [2020-09-21 10:26:21,479 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3495 transitions. Word has length 558 [2020-09-21 10:26:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:21,480 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3495 transitions. [2020-09-21 10:26:21,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:26:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3495 transitions. [2020-09-21 10:26:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-09-21 10:26:21,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:21,497 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:21,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:26:21,497 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:21,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash -229639858, now seen corresponding path program 1 times [2020-09-21 10:26:21,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:21,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814798782] [2020-09-21 10:26:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:22,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-09-21 10:26:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 439 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-09-21 10:26:22,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814798782] [2020-09-21 10:26:22,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:22,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:26:22,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600593613] [2020-09-21 10:26:22,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:26:22,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:22,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:26:22,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:26:22,632 INFO L87 Difference]: Start difference. First operand 3174 states and 3495 transitions. Second operand 10 states. [2020-09-21 10:26:23,246 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-09-21 10:26:23,962 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-09-21 10:26:24,705 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-09-21 10:26:25,263 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-09-21 10:26:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:26,104 INFO L93 Difference]: Finished difference Result 5994 states and 6643 transitions. [2020-09-21 10:26:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:26:26,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 591 [2020-09-21 10:26:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:26,119 INFO L225 Difference]: With dead ends: 5994 [2020-09-21 10:26:26,119 INFO L226 Difference]: Without dead ends: 3192 [2020-09-21 10:26:26,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:26:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-09-21 10:26:26,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-09-21 10:26:26,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-09-21 10:26:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3486 transitions. [2020-09-21 10:26:26,203 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3486 transitions. Word has length 591 [2020-09-21 10:26:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:26,204 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3486 transitions. [2020-09-21 10:26:26,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:26:26,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3486 transitions. [2020-09-21 10:26:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2020-09-21 10:26:26,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:26,218 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:26,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:26:26,218 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:26,219 INFO L82 PathProgramCache]: Analyzing trace with hash -278736799, now seen corresponding path program 2 times [2020-09-21 10:26:26,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:26,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493787751] [2020-09-21 10:26:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-09-21 10:26:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-09-21 10:26:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1384 backedges. 609 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-09-21 10:26:27,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493787751] [2020-09-21 10:26:27,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:27,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:26:27,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540274255] [2020-09-21 10:26:27,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:26:27,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:27,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:26:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:26:27,567 INFO L87 Difference]: Start difference. First operand 3178 states and 3486 transitions. Second operand 9 states. [2020-09-21 10:26:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:30,479 INFO L93 Difference]: Finished difference Result 6354 states and 6982 transitions. [2020-09-21 10:26:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:26:30,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 701 [2020-09-21 10:26:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:30,493 INFO L225 Difference]: With dead ends: 6354 [2020-09-21 10:26:30,494 INFO L226 Difference]: Without dead ends: 3364 [2020-09-21 10:26:30,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:26:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-09-21 10:26:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-09-21 10:26:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-09-21 10:26:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3484 transitions. [2020-09-21 10:26:30,576 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3484 transitions. Word has length 701 [2020-09-21 10:26:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:30,577 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3484 transitions. [2020-09-21 10:26:30,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:26:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3484 transitions. [2020-09-21 10:26:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-09-21 10:26:30,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:30,612 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:30,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:26:30,612 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:30,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:30,613 INFO L82 PathProgramCache]: Analyzing trace with hash -638310518, now seen corresponding path program 1 times [2020-09-21 10:26:30,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:30,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622214547] [2020-09-21 10:26:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:31,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-21 10:26:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:31,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-09-21 10:26:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 616 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-09-21 10:26:31,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622214547] [2020-09-21 10:26:31,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:31,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:26:31,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131379006] [2020-09-21 10:26:32,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:26:32,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:32,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:26:32,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:26:32,003 INFO L87 Difference]: Start difference. First operand 3178 states and 3484 transitions. Second operand 10 states. [2020-09-21 10:26:32,584 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-09-21 10:26:32,723 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-09-21 10:26:33,343 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-09-21 10:26:35,048 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-09-21 10:26:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:36,134 INFO L93 Difference]: Finished difference Result 6540 states and 7200 transitions. [2020-09-21 10:26:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:26:36,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 708 [2020-09-21 10:26:36,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:36,149 INFO L225 Difference]: With dead ends: 6540 [2020-09-21 10:26:36,150 INFO L226 Difference]: Without dead ends: 3552 [2020-09-21 10:26:36,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:26:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-09-21 10:26:36,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-09-21 10:26:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-09-21 10:26:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3869 transitions. [2020-09-21 10:26:36,229 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3869 transitions. Word has length 708 [2020-09-21 10:26:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:36,231 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3869 transitions. [2020-09-21 10:26:36,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:26:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3869 transitions. [2020-09-21 10:26:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2020-09-21 10:26:36,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:36,242 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:36,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:26:36,243 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:36,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1537329314, now seen corresponding path program 1 times [2020-09-21 10:26:36,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:36,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591618862] [2020-09-21 10:26:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:36,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:36,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:36,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:36,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:36,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-21 10:26:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:36,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-09-21 10:26:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 763 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-09-21 10:26:37,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591618862] [2020-09-21 10:26:37,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:37,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:26:37,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640274081] [2020-09-21 10:26:37,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:26:37,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:37,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:26:37,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:26:37,293 INFO L87 Difference]: Start difference. First operand 3548 states and 3869 transitions. Second operand 7 states. [2020-09-21 10:26:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:38,996 INFO L93 Difference]: Finished difference Result 8032 states and 8890 transitions. [2020-09-21 10:26:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:26:38,996 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 734 [2020-09-21 10:26:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:39,015 INFO L225 Difference]: With dead ends: 8032 [2020-09-21 10:26:39,015 INFO L226 Difference]: Without dead ends: 4674 [2020-09-21 10:26:39,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:26:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-09-21 10:26:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-09-21 10:26:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-09-21 10:26:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4750 transitions. [2020-09-21 10:26:39,106 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4750 transitions. Word has length 734 [2020-09-21 10:26:39,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:39,107 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4750 transitions. [2020-09-21 10:26:39,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:26:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4750 transitions. [2020-09-21 10:26:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2020-09-21 10:26:39,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:39,119 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:39,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:26:39,120 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:39,120 INFO L82 PathProgramCache]: Analyzing trace with hash -583849898, now seen corresponding path program 1 times [2020-09-21 10:26:39,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:39,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289241290] [2020-09-21 10:26:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:39,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:39,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:39,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:39,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:39,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-21 10:26:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:39,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-09-21 10:26:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:39,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-09-21 10:26:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 327 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-09-21 10:26:40,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289241290] [2020-09-21 10:26:40,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:40,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:26:40,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305985177] [2020-09-21 10:26:40,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:26:40,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:40,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:26:40,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:26:40,187 INFO L87 Difference]: Start difference. First operand 4292 states and 4750 transitions. Second operand 5 states. [2020-09-21 10:26:41,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:41,673 INFO L93 Difference]: Finished difference Result 4296 states and 4753 transitions. [2020-09-21 10:26:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:26:41,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 789 [2020-09-21 10:26:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:41,687 INFO L225 Difference]: With dead ends: 4296 [2020-09-21 10:26:41,687 INFO L226 Difference]: Without dead ends: 4294 [2020-09-21 10:26:41,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:26:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-09-21 10:26:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-09-21 10:26:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-09-21 10:26:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-09-21 10:26:41,766 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 789 [2020-09-21 10:26:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:41,767 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-09-21 10:26:41,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:26:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-09-21 10:26:41,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-09-21 10:26:41,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:41,780 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:41,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:26:41,781 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:41,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1874704500, now seen corresponding path program 1 times [2020-09-21 10:26:41,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:41,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689866595] [2020-09-21 10:26:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:42,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:42,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:42,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:42,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:42,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-21 10:26:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:42,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-09-21 10:26:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:42,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-09-21 10:26:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:42,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-09-21 10:26:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 382 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-09-21 10:26:42,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689866595] [2020-09-21 10:26:42,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:42,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:26:42,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83688690] [2020-09-21 10:26:42,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:26:42,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:42,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:26:42,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:26:42,805 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-09-21 10:26:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:44,345 INFO L93 Difference]: Finished difference Result 9128 states and 10168 transitions. [2020-09-21 10:26:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:26:44,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 834 [2020-09-21 10:26:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:44,365 INFO L225 Difference]: With dead ends: 9128 [2020-09-21 10:26:44,365 INFO L226 Difference]: Without dead ends: 5026 [2020-09-21 10:26:44,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:26:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2020-09-21 10:26:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3918. [2020-09-21 10:26:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3918 states. [2020-09-21 10:26:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 4287 transitions. [2020-09-21 10:26:44,445 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 4287 transitions. Word has length 834 [2020-09-21 10:26:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:44,446 INFO L479 AbstractCegarLoop]: Abstraction has 3918 states and 4287 transitions. [2020-09-21 10:26:44,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:26:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 4287 transitions. [2020-09-21 10:26:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-09-21 10:26:44,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:44,460 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:44,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:26:44,461 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:44,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:44,461 INFO L82 PathProgramCache]: Analyzing trace with hash -177347705, now seen corresponding path program 1 times [2020-09-21 10:26:44,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:44,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647194752] [2020-09-21 10:26:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:44,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:44,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:44,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:44,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:44,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-21 10:26:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:44,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-09-21 10:26:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:44,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-09-21 10:26:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat