/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 17:14:11,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 17:14:11,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 17:14:11,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 17:14:11,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 17:14:11,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 17:14:11,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 17:14:11,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 17:14:11,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 17:14:11,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 17:14:11,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 17:14:11,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 17:14:11,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 17:14:11,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 17:14:11,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 17:14:11,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 17:14:11,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 17:14:11,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 17:14:11,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 17:14:11,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 17:14:11,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 17:14:11,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 17:14:11,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 17:14:11,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 17:14:11,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 17:14:11,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 17:14:11,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 17:14:11,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 17:14:11,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 17:14:11,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 17:14:11,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 17:14:11,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 17:14:11,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 17:14:11,238 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 17:14:11,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 17:14:11,239 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 17:14:11,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 17:14:11,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 17:14:11,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 17:14:11,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 17:14:11,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 17:14:11,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 17:14:11,241 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 17:14:11,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 17:14:11,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 17:14:11,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 17:14:11,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 17:14:11,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 17:14:11,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 17:14:11,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 17:14:11,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:14:11,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 17:14:11,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 17:14:11,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 17:14:11,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 17:14:11,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 17:14:11,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 17:14:11,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 17:14:11,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 17:14:11,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 17:14:11,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 17:14:11,603 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 17:14:11,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 17:14:11,605 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 17:14:11,605 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 17:14:11,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ab0c7b58/0548a26e90ad4a79980a9fb072527be8/FLAGabd718768 [2020-08-22 17:14:12,325 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 17:14:12,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 17:14:12,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ab0c7b58/0548a26e90ad4a79980a9fb072527be8/FLAGabd718768 [2020-08-22 17:14:12,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ab0c7b58/0548a26e90ad4a79980a9fb072527be8 [2020-08-22 17:14:12,536 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 17:14:12,538 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 17:14:12,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 17:14:12,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 17:14:12,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 17:14:12,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:14:12" (1/1) ... [2020-08-22 17:14:12,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35aa2f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:12, skipping insertion in model container [2020-08-22 17:14:12,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:14:12" (1/1) ... [2020-08-22 17:14:12,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 17:14:12,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 17:14:13,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:14:13,754 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 17:14:14,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:14:14,216 INFO L208 MainTranslator]: Completed translation [2020-08-22 17:14:14,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:14 WrapperNode [2020-08-22 17:14:14,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 17:14:14,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 17:14:14,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 17:14:14,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 17:14:14,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:14" (1/1) ... [2020-08-22 17:14:14,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:14" (1/1) ... [2020-08-22 17:14:14,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:14" (1/1) ... [2020-08-22 17:14:14,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:14" (1/1) ... [2020-08-22 17:14:14,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:14" (1/1) ... [2020-08-22 17:14:14,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:14" (1/1) ... [2020-08-22 17:14:14,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:14" (1/1) ... [2020-08-22 17:14:14,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 17:14:14,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 17:14:14,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 17:14:14,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 17:14:14,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:14:14,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 17:14:14,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 17:14:14,502 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 17:14:14,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 17:14:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 17:14:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 17:14:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 17:14:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 17:14:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 17:14:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 17:14:14,505 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 17:14:14,505 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 17:14:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 17:14:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 17:14:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 17:14:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 17:14:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 17:14:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 17:14:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 17:14:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 17:14:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 17:14:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 17:14:17,194 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 17:14:17,194 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 17:14:17,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:14:17 BoogieIcfgContainer [2020-08-22 17:14:17,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 17:14:17,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 17:14:17,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 17:14:17,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 17:14:17,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:14:12" (1/3) ... [2020-08-22 17:14:17,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ceeb97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:14:17, skipping insertion in model container [2020-08-22 17:14:17,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:14" (2/3) ... [2020-08-22 17:14:17,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ceeb97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:14:17, skipping insertion in model container [2020-08-22 17:14:17,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:14:17" (3/3) ... [2020-08-22 17:14:17,224 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 17:14:17,233 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 17:14:17,242 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 17:14:17,256 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 17:14:17,282 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 17:14:17,283 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 17:14:17,283 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 17:14:17,283 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 17:14:17,283 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 17:14:17,283 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 17:14:17,283 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 17:14:17,283 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 17:14:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-08-22 17:14:17,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 17:14:17,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:17,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:17,348 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:17,355 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-08-22 17:14:17,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:17,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742302623] [2020-08-22 17:14:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:19,024 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:14:19,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:19,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742302623] [2020-08-22 17:14:19,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:19,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:19,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570970615] [2020-08-22 17:14:19,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:19,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:19,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:19,232 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-08-22 17:14:19,723 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 17:14:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:24,536 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-08-22 17:14:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:14:24,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 17:14:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:24,568 INFO L225 Difference]: With dead ends: 1489 [2020-08-22 17:14:24,568 INFO L226 Difference]: Without dead ends: 1273 [2020-08-22 17:14:24,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:14:24,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-08-22 17:14:24,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-08-22 17:14:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-08-22 17:14:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-08-22 17:14:24,728 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-08-22 17:14:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:24,733 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-08-22 17:14:24,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-08-22 17:14:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 17:14:24,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:24,749 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:24,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 17:14:24,749 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-08-22 17:14:24,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:24,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904512524] [2020-08-22 17:14:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:25,745 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:14:25,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:26,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904512524] [2020-08-22 17:14:26,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:26,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:26,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030405691] [2020-08-22 17:14:26,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:26,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:26,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:26,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:26,064 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-08-22 17:14:26,684 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 17:14:30,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:30,823 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-08-22 17:14:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:14:30,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 17:14:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:30,839 INFO L225 Difference]: With dead ends: 2607 [2020-08-22 17:14:30,839 INFO L226 Difference]: Without dead ends: 2225 [2020-08-22 17:14:30,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:14:30,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-08-22 17:14:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-08-22 17:14:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-08-22 17:14:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-08-22 17:14:30,923 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-08-22 17:14:30,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:30,924 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-08-22 17:14:30,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-08-22 17:14:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 17:14:30,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:30,933 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:30,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 17:14:30,934 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:30,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-08-22 17:14:30,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:30,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333996520] [2020-08-22 17:14:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:31,738 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:14:31,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:31,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333996520] [2020-08-22 17:14:31,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:31,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:31,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813998857] [2020-08-22 17:14:31,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:31,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:31,869 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-08-22 17:14:32,404 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 17:14:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:36,275 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-08-22 17:14:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:14:36,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 17:14:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:36,299 INFO L225 Difference]: With dead ends: 4715 [2020-08-22 17:14:36,299 INFO L226 Difference]: Without dead ends: 4049 [2020-08-22 17:14:36,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:14:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-08-22 17:14:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-08-22 17:14:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-08-22 17:14:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-08-22 17:14:36,435 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-08-22 17:14:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:36,435 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-08-22 17:14:36,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-08-22 17:14:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 17:14:36,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:36,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:36,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 17:14:36,448 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-08-22 17:14:36,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:36,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436330011] [2020-08-22 17:14:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:37,386 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:14:37,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:37,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436330011] [2020-08-22 17:14:37,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:37,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:14:37,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827316559] [2020-08-22 17:14:37,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:14:37,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:37,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:14:37,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:14:37,597 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-08-22 17:14:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:44,140 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-08-22 17:14:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:14:44,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-08-22 17:14:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:44,178 INFO L225 Difference]: With dead ends: 11998 [2020-08-22 17:14:44,178 INFO L226 Difference]: Without dead ends: 7966 [2020-08-22 17:14:44,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:14:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-08-22 17:14:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-08-22 17:14:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-08-22 17:14:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-08-22 17:14:44,478 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-08-22 17:14:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:44,479 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-08-22 17:14:44,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:14:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-08-22 17:14:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 17:14:44,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:44,498 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:44,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 17:14:44,499 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-08-22 17:14:44,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:44,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522012577] [2020-08-22 17:14:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:45,133 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:14:45,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:45,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522012577] [2020-08-22 17:14:45,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:45,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:45,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288505023] [2020-08-22 17:14:45,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:45,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:45,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:45,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:45,306 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-08-22 17:14:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:52,817 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-08-22 17:14:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:14:52,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 17:14:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:52,877 INFO L225 Difference]: With dead ends: 23441 [2020-08-22 17:14:52,877 INFO L226 Difference]: Without dead ends: 15606 [2020-08-22 17:14:52,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-08-22 17:14:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-08-22 17:14:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-08-22 17:14:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-08-22 17:14:53,458 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-08-22 17:14:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:53,458 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-08-22 17:14:53,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-08-22 17:14:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 17:14:53,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:53,490 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:53,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 17:14:53,491 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:53,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:53,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-08-22 17:14:53,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:53,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916578227] [2020-08-22 17:14:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:54,166 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:14:54,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:54,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916578227] [2020-08-22 17:14:54,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:54,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:54,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854769200] [2020-08-22 17:14:54,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:54,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:54,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:54,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:54,284 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-08-22 17:15:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:02,206 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-08-22 17:15:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:02,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 17:15:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:02,274 INFO L225 Difference]: With dead ends: 46737 [2020-08-22 17:15:02,274 INFO L226 Difference]: Without dead ends: 31175 [2020-08-22 17:15:02,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2020-08-22 17:15:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 15623. [2020-08-22 17:15:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-08-22 17:15:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23921 transitions. [2020-08-22 17:15:03,941 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23921 transitions. Word has length 328 [2020-08-22 17:15:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:03,941 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23921 transitions. [2020-08-22 17:15:03,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23921 transitions. [2020-08-22 17:15:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-22 17:15:03,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:03,971 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:03,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 17:15:03,971 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:03,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1133119755, now seen corresponding path program 1 times [2020-08-22 17:15:03,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:03,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863960799] [2020-08-22 17:15:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:04,472 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:15:04,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:04,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863960799] [2020-08-22 17:15:04,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:04,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:04,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107023485] [2020-08-22 17:15:04,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:04,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:04,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:04,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:04,577 INFO L87 Difference]: Start difference. First operand 15623 states and 23921 transitions. Second operand 4 states. [2020-08-22 17:15:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:12,673 INFO L93 Difference]: Finished difference Result 46756 states and 71576 transitions. [2020-08-22 17:15:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:12,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-08-22 17:15:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:12,729 INFO L225 Difference]: With dead ends: 46756 [2020-08-22 17:15:12,729 INFO L226 Difference]: Without dead ends: 31193 [2020-08-22 17:15:12,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31193 states. [2020-08-22 17:15:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31193 to 15641. [2020-08-22 17:15:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15641 states. [2020-08-22 17:15:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15641 states to 15641 states and 23942 transitions. [2020-08-22 17:15:13,519 INFO L78 Accepts]: Start accepts. Automaton has 15641 states and 23942 transitions. Word has length 329 [2020-08-22 17:15:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:13,519 INFO L479 AbstractCegarLoop]: Abstraction has 15641 states and 23942 transitions. [2020-08-22 17:15:13,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 15641 states and 23942 transitions. [2020-08-22 17:15:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 17:15:13,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:13,550 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:13,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 17:15:13,550 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:13,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1733447043, now seen corresponding path program 1 times [2020-08-22 17:15:13,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:13,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002918033] [2020-08-22 17:15:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:14,161 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:15:14,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:14,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002918033] [2020-08-22 17:15:14,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:14,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:14,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793712591] [2020-08-22 17:15:14,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:14,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:14,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:14,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:14,309 INFO L87 Difference]: Start difference. First operand 15641 states and 23942 transitions. Second operand 4 states. [2020-08-22 17:15:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:22,688 INFO L93 Difference]: Finished difference Result 44290 states and 67647 transitions. [2020-08-22 17:15:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:22,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-22 17:15:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:22,726 INFO L225 Difference]: With dead ends: 44290 [2020-08-22 17:15:22,726 INFO L226 Difference]: Without dead ends: 28894 [2020-08-22 17:15:22,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28894 states. [2020-08-22 17:15:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28894 to 28892. [2020-08-22 17:15:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28892 states. [2020-08-22 17:15:23,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28892 states to 28892 states and 43902 transitions. [2020-08-22 17:15:23,857 INFO L78 Accepts]: Start accepts. Automaton has 28892 states and 43902 transitions. Word has length 330 [2020-08-22 17:15:23,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:23,858 INFO L479 AbstractCegarLoop]: Abstraction has 28892 states and 43902 transitions. [2020-08-22 17:15:23,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:23,858 INFO L276 IsEmpty]: Start isEmpty. Operand 28892 states and 43902 transitions. [2020-08-22 17:15:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 17:15:23,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:23,903 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:23,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 17:15:23,903 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:23,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2142783200, now seen corresponding path program 1 times [2020-08-22 17:15:23,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:23,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503053846] [2020-08-22 17:15:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:24,691 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:15:24,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:24,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503053846] [2020-08-22 17:15:24,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:24,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:15:24,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841505858] [2020-08-22 17:15:24,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:15:24,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:24,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:15:24,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:15:24,806 INFO L87 Difference]: Start difference. First operand 28892 states and 43902 transitions. Second operand 5 states. [2020-08-22 17:15:31,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:31,158 INFO L93 Difference]: Finished difference Result 59161 states and 89885 transitions. [2020-08-22 17:15:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:15:31,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-08-22 17:15:31,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:31,191 INFO L225 Difference]: With dead ends: 59161 [2020-08-22 17:15:31,191 INFO L226 Difference]: Without dead ends: 29761 [2020-08-22 17:15:31,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:15:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29761 states. [2020-08-22 17:15:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29761 to 29759. [2020-08-22 17:15:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29759 states. [2020-08-22 17:15:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29759 states to 29759 states and 45040 transitions. [2020-08-22 17:15:32,418 INFO L78 Accepts]: Start accepts. Automaton has 29759 states and 45040 transitions. Word has length 330 [2020-08-22 17:15:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:32,419 INFO L479 AbstractCegarLoop]: Abstraction has 29759 states and 45040 transitions. [2020-08-22 17:15:32,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:15:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 29759 states and 45040 transitions. [2020-08-22 17:15:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-08-22 17:15:32,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:32,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:32,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 17:15:32,439 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:32,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:32,440 INFO L82 PathProgramCache]: Analyzing trace with hash 82673009, now seen corresponding path program 1 times [2020-08-22 17:15:32,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:32,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776941566] [2020-08-22 17:15:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:32,996 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:15:32,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:33,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776941566] [2020-08-22 17:15:33,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:33,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:33,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700504001] [2020-08-22 17:15:33,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:33,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:33,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:33,096 INFO L87 Difference]: Start difference. First operand 29759 states and 45040 transitions. Second operand 4 states. [2020-08-22 17:15:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:40,122 INFO L93 Difference]: Finished difference Result 70125 states and 107206 transitions. [2020-08-22 17:15:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:40,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-08-22 17:15:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:40,164 INFO L225 Difference]: With dead ends: 70125 [2020-08-22 17:15:40,164 INFO L226 Difference]: Without dead ends: 42593 [2020-08-22 17:15:40,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42593 states. [2020-08-22 17:15:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42593 to 37231. [2020-08-22 17:15:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37231 states. [2020-08-22 17:15:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37231 states to 37231 states and 57292 transitions. [2020-08-22 17:15:41,570 INFO L78 Accepts]: Start accepts. Automaton has 37231 states and 57292 transitions. Word has length 331 [2020-08-22 17:15:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:41,570 INFO L479 AbstractCegarLoop]: Abstraction has 37231 states and 57292 transitions. [2020-08-22 17:15:41,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:41,570 INFO L276 IsEmpty]: Start isEmpty. Operand 37231 states and 57292 transitions. [2020-08-22 17:15:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-22 17:15:41,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:41,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:41,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 17:15:41,592 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:41,592 INFO L82 PathProgramCache]: Analyzing trace with hash 942168383, now seen corresponding path program 1 times [2020-08-22 17:15:41,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:41,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235909583] [2020-08-22 17:15:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:42,092 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:15:42,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:42,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235909583] [2020-08-22 17:15:42,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:42,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:42,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045373977] [2020-08-22 17:15:42,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:42,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:42,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:42,191 INFO L87 Difference]: Start difference. First operand 37231 states and 57292 transitions. Second operand 4 states. [2020-08-22 17:15:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:48,732 INFO L93 Difference]: Finished difference Result 110821 states and 170399 transitions. [2020-08-22 17:15:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:48,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-22 17:15:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:48,817 INFO L225 Difference]: With dead ends: 110821 [2020-08-22 17:15:48,818 INFO L226 Difference]: Without dead ends: 74043 [2020-08-22 17:15:48,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74043 states. [2020-08-22 17:15:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74043 to 37289. [2020-08-22 17:15:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37289 states. [2020-08-22 17:15:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37289 states to 37289 states and 57367 transitions. [2020-08-22 17:15:50,753 INFO L78 Accepts]: Start accepts. Automaton has 37289 states and 57367 transitions. Word has length 332 [2020-08-22 17:15:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:50,754 INFO L479 AbstractCegarLoop]: Abstraction has 37289 states and 57367 transitions. [2020-08-22 17:15:50,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 37289 states and 57367 transitions. [2020-08-22 17:15:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-22 17:15:50,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:50,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:50,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 17:15:50,779 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:50,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1231527171, now seen corresponding path program 1 times [2020-08-22 17:15:50,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:50,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553616100] [2020-08-22 17:15:50,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:51,913 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:15:51,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:52,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553616100] [2020-08-22 17:15:52,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:52,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:52,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973100094] [2020-08-22 17:15:52,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:52,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:52,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:52,040 INFO L87 Difference]: Start difference. First operand 37289 states and 57367 transitions. Second operand 4 states. [2020-08-22 17:16:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:02,270 INFO L93 Difference]: Finished difference Result 109952 states and 168910 transitions. [2020-08-22 17:16:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:16:02,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-22 17:16:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:02,352 INFO L225 Difference]: With dead ends: 109952 [2020-08-22 17:16:02,352 INFO L226 Difference]: Without dead ends: 72948 [2020-08-22 17:16:02,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:16:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72948 states. [2020-08-22 17:16:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72948 to 72946. [2020-08-22 17:16:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72946 states. [2020-08-22 17:16:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72946 states to 72946 states and 111466 transitions. [2020-08-22 17:16:06,620 INFO L78 Accepts]: Start accepts. Automaton has 72946 states and 111466 transitions. Word has length 332 [2020-08-22 17:16:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:16:06,620 INFO L479 AbstractCegarLoop]: Abstraction has 72946 states and 111466 transitions. [2020-08-22 17:16:06,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:16:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 72946 states and 111466 transitions. [2020-08-22 17:16:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-22 17:16:06,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:16:06,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:16:06,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 17:16:06,657 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:16:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:16:06,657 INFO L82 PathProgramCache]: Analyzing trace with hash 574493146, now seen corresponding path program 1 times [2020-08-22 17:16:06,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:16:06,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607201157] [2020-08-22 17:16:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:16:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:07,513 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:16:07,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:16:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:07,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607201157] [2020-08-22 17:16:07,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:07,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:16:07,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398121944] [2020-08-22 17:16:07,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:16:07,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:16:07,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:16:07,623 INFO L87 Difference]: Start difference. First operand 72946 states and 111466 transitions. Second operand 5 states. [2020-08-22 17:16:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:17,579 INFO L93 Difference]: Finished difference Result 149624 states and 228357 transitions. [2020-08-22 17:16:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:16:17,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-08-22 17:16:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:17,662 INFO L225 Difference]: With dead ends: 149624 [2020-08-22 17:16:17,662 INFO L226 Difference]: Without dead ends: 75480 [2020-08-22 17:16:17,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:16:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75480 states. [2020-08-22 17:16:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75480 to 75478. [2020-08-22 17:16:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75478 states. [2020-08-22 17:16:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75478 states to 75478 states and 114725 transitions. [2020-08-22 17:16:21,113 INFO L78 Accepts]: Start accepts. Automaton has 75478 states and 114725 transitions. Word has length 332 [2020-08-22 17:16:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:16:21,113 INFO L479 AbstractCegarLoop]: Abstraction has 75478 states and 114725 transitions. [2020-08-22 17:16:21,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:16:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 75478 states and 114725 transitions. [2020-08-22 17:16:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-22 17:16:21,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:16:21,149 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:16:21,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 17:16:21,149 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:16:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:16:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash -234242260, now seen corresponding path program 1 times [2020-08-22 17:16:21,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:16:21,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831030883] [2020-08-22 17:16:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:16:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:21,906 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:16:21,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:16:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:22,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831030883] [2020-08-22 17:16:22,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:22,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:16:22,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724769480] [2020-08-22 17:16:22,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:16:22,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:22,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:16:22,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:16:22,011 INFO L87 Difference]: Start difference. First operand 75478 states and 114725 transitions. Second operand 5 states. [2020-08-22 17:16:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:38,403 INFO L93 Difference]: Finished difference Result 216966 states and 329318 transitions. [2020-08-22 17:16:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:16:38,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-08-22 17:16:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:38,556 INFO L225 Difference]: With dead ends: 216966 [2020-08-22 17:16:38,556 INFO L226 Difference]: Without dead ends: 143624 [2020-08-22 17:16:38,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:16:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143624 states. [2020-08-22 17:16:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143624 to 76077. [2020-08-22 17:16:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76077 states. [2020-08-22 17:16:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76077 states to 76077 states and 115613 transitions. [2020-08-22 17:16:42,972 INFO L78 Accepts]: Start accepts. Automaton has 76077 states and 115613 transitions. Word has length 332 [2020-08-22 17:16:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:16:42,973 INFO L479 AbstractCegarLoop]: Abstraction has 76077 states and 115613 transitions. [2020-08-22 17:16:42,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:16:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 76077 states and 115613 transitions. [2020-08-22 17:16:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-08-22 17:16:43,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:16:43,013 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:16:43,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 17:16:43,013 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:16:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:16:43,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1874773864, now seen corresponding path program 1 times [2020-08-22 17:16:43,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:16:43,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89786587] [2020-08-22 17:16:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:16:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:43,620 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:16:43,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:16:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:43,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89786587] [2020-08-22 17:16:43,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:43,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:16:43,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410101150] [2020-08-22 17:16:43,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:16:43,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:43,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:16:43,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:16:43,725 INFO L87 Difference]: Start difference. First operand 76077 states and 115613 transitions. Second operand 4 states. [2020-08-22 17:16:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:57,013 INFO L93 Difference]: Finished difference Result 186567 states and 285249 transitions. [2020-08-22 17:16:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:16:57,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-08-22 17:16:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:57,152 INFO L225 Difference]: With dead ends: 186567 [2020-08-22 17:16:57,152 INFO L226 Difference]: Without dead ends: 118847 [2020-08-22 17:16:57,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:16:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118847 states. [2020-08-22 17:17:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118847 to 102821. [2020-08-22 17:17:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102821 states. [2020-08-22 17:17:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102821 states to 102821 states and 158641 transitions. [2020-08-22 17:17:03,019 INFO L78 Accepts]: Start accepts. Automaton has 102821 states and 158641 transitions. Word has length 334 [2020-08-22 17:17:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:17:03,020 INFO L479 AbstractCegarLoop]: Abstraction has 102821 states and 158641 transitions. [2020-08-22 17:17:03,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:17:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 102821 states and 158641 transitions. [2020-08-22 17:17:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-08-22 17:17:03,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:17:03,057 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:17:03,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 17:17:03,057 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:17:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:17:03,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2052198596, now seen corresponding path program 1 times [2020-08-22 17:17:03,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:17:03,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665654835] [2020-08-22 17:17:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:17:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:03,657 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:17:03,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:17:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:17:03,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665654835] [2020-08-22 17:17:03,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:17:03,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:17:03,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015970795] [2020-08-22 17:17:03,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:17:03,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:17:03,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:17:03,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:17:03,772 INFO L87 Difference]: Start difference. First operand 102821 states and 158641 transitions. Second operand 4 states. [2020-08-22 17:17:23,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:17:23,750 INFO L93 Difference]: Finished difference Result 302517 states and 466349 transitions. [2020-08-22 17:17:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:17:23,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-08-22 17:17:23,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:17:24,028 INFO L225 Difference]: With dead ends: 302517 [2020-08-22 17:17:24,028 INFO L226 Difference]: Without dead ends: 202403 [2020-08-22 17:17:24,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:17:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202403 states. [2020-08-22 17:17:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202403 to 103149. [2020-08-22 17:17:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103149 states. [2020-08-22 17:17:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103149 states to 103149 states and 159079 transitions. [2020-08-22 17:17:33,694 INFO L78 Accepts]: Start accepts. Automaton has 103149 states and 159079 transitions. Word has length 334 [2020-08-22 17:17:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:17:33,694 INFO L479 AbstractCegarLoop]: Abstraction has 103149 states and 159079 transitions. [2020-08-22 17:17:33,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:17:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 103149 states and 159079 transitions. [2020-08-22 17:17:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-08-22 17:17:33,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:17:33,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:17:33,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 17:17:33,738 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:17:33,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:17:33,738 INFO L82 PathProgramCache]: Analyzing trace with hash 924020310, now seen corresponding path program 1 times [2020-08-22 17:17:33,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:17:33,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570428996] [2020-08-22 17:17:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:17:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:34,401 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:17:34,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:17:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:17:34,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570428996] [2020-08-22 17:17:34,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:17:34,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 17:17:34,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923455236] [2020-08-22 17:17:34,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 17:17:34,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:17:34,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 17:17:34,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 17:17:34,566 INFO L87 Difference]: Start difference. First operand 103149 states and 159079 transitions. Second operand 7 states. [2020-08-22 17:17:35,167 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:17:55,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:17:55,842 INFO L93 Difference]: Finished difference Result 302419 states and 471676 transitions. [2020-08-22 17:17:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 17:17:55,843 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 334 [2020-08-22 17:17:55,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:17:56,153 INFO L225 Difference]: With dead ends: 302419 [2020-08-22 17:17:56,154 INFO L226 Difference]: Without dead ends: 206479 [2020-08-22 17:17:56,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-08-22 17:17:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206479 states. [2020-08-22 17:18:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206479 to 206475. [2020-08-22 17:18:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206475 states. [2020-08-22 17:18:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206475 states to 206475 states and 322471 transitions. [2020-08-22 17:18:12,446 INFO L78 Accepts]: Start accepts. Automaton has 206475 states and 322471 transitions. Word has length 334 [2020-08-22 17:18:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:18:12,446 INFO L479 AbstractCegarLoop]: Abstraction has 206475 states and 322471 transitions. [2020-08-22 17:18:12,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 17:18:12,447 INFO L276 IsEmpty]: Start isEmpty. Operand 206475 states and 322471 transitions. [2020-08-22 17:18:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-08-22 17:18:12,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:18:12,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:18:12,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 17:18:12,504 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:18:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:18:12,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2073937905, now seen corresponding path program 1 times [2020-08-22 17:18:12,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:18:12,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846419899] [2020-08-22 17:18:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:18:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:13,175 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:18:13,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:18:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:18:13,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846419899] [2020-08-22 17:18:13,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:18:13,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:18:13,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281209039] [2020-08-22 17:18:13,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:18:13,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:18:13,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:18:13,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:18:13,297 INFO L87 Difference]: Start difference. First operand 206475 states and 322471 transitions. Second operand 5 states. [2020-08-22 17:18:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:18:52,541 INFO L93 Difference]: Finished difference Result 611835 states and 955799 transitions. [2020-08-22 17:18:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:18:52,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-08-22 17:18:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:18:53,166 INFO L225 Difference]: With dead ends: 611835 [2020-08-22 17:18:53,167 INFO L226 Difference]: Without dead ends: 406168 [2020-08-22 17:18:53,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:18:53,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406168 states. [2020-08-22 17:19:27,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406168 to 406166. [2020-08-22 17:19:27,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406166 states. [2020-08-22 17:19:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406166 states to 406166 states and 632002 transitions. [2020-08-22 17:19:28,580 INFO L78 Accepts]: Start accepts. Automaton has 406166 states and 632002 transitions. Word has length 334 [2020-08-22 17:19:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:19:28,580 INFO L479 AbstractCegarLoop]: Abstraction has 406166 states and 632002 transitions. [2020-08-22 17:19:28,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:19:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 406166 states and 632002 transitions. [2020-08-22 17:19:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-08-22 17:19:28,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:19:28,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:19:28,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 17:19:28,691 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:19:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:19:28,691 INFO L82 PathProgramCache]: Analyzing trace with hash -860846706, now seen corresponding path program 1 times [2020-08-22 17:19:28,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:19:28,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969243201] [2020-08-22 17:19:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:19:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:29,216 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:19:29,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:19:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:19:29,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969243201] [2020-08-22 17:19:29,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:19:29,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:19:29,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733661926] [2020-08-22 17:19:29,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:19:29,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:19:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:19:29,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:19:29,306 INFO L87 Difference]: Start difference. First operand 406166 states and 632002 transitions. Second operand 4 states. [2020-08-22 17:20:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:20:45,861 INFO L93 Difference]: Finished difference Result 1207622 states and 1878905 transitions. [2020-08-22 17:20:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:20:45,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-08-22 17:20:45,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:20:47,228 INFO L225 Difference]: With dead ends: 1207622 [2020-08-22 17:20:47,228 INFO L226 Difference]: Without dead ends: 806362 [2020-08-22 17:20:47,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:20:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806362 states. [2020-08-22 17:21:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806362 to 406792. [2020-08-22 17:21:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406792 states. [2020-08-22 17:21:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406792 states to 406792 states and 632696 transitions. [2020-08-22 17:21:32,173 INFO L78 Accepts]: Start accepts. Automaton has 406792 states and 632696 transitions. Word has length 335 [2020-08-22 17:21:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:21:32,174 INFO L479 AbstractCegarLoop]: Abstraction has 406792 states and 632696 transitions. [2020-08-22 17:21:32,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:21:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 406792 states and 632696 transitions. [2020-08-22 17:21:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-08-22 17:21:32,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:21:32,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:21:32,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 17:21:32,304 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:21:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:21:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash 162534671, now seen corresponding path program 1 times [2020-08-22 17:21:32,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:21:32,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851660232] [2020-08-22 17:21:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:21:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:32,999 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:21:33,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:21:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:21:33,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851660232] [2020-08-22 17:21:33,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:21:33,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:21:33,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138197487] [2020-08-22 17:21:33,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:21:33,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:21:33,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:21:33,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:21:33,072 INFO L87 Difference]: Start difference. First operand 406792 states and 632696 transitions. Second operand 5 states. [2020-08-22 17:22:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:22:18,572 INFO L93 Difference]: Finished difference Result 591481 states and 919701 transitions. [2020-08-22 17:22:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:22:18,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-08-22 17:22:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:22:19,252 INFO L225 Difference]: With dead ends: 591481 [2020-08-22 17:22:19,252 INFO L226 Difference]: Without dead ends: 406794 [2020-08-22 17:22:19,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:22:19,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406794 states. [2020-08-22 17:22:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406794 to 402530. [2020-08-22 17:22:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402530 states. [2020-08-22 17:23:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402530 states to 402530 states and 626512 transitions. [2020-08-22 17:23:00,530 INFO L78 Accepts]: Start accepts. Automaton has 402530 states and 626512 transitions. Word has length 336 [2020-08-22 17:23:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:23:00,530 INFO L479 AbstractCegarLoop]: Abstraction has 402530 states and 626512 transitions. [2020-08-22 17:23:00,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:23:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 402530 states and 626512 transitions. [2020-08-22 17:23:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-08-22 17:23:00,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:23:00,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:23:00,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 17:23:00,658 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:23:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:23:00,658 INFO L82 PathProgramCache]: Analyzing trace with hash 159027383, now seen corresponding path program 1 times [2020-08-22 17:23:00,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:23:00,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151759815] [2020-08-22 17:23:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:23:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:01,275 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:23:01,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:23:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:23:01,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151759815] [2020-08-22 17:23:01,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:23:01,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:23:01,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851189128] [2020-08-22 17:23:01,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:23:01,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:23:01,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:23:01,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:23:01,381 INFO L87 Difference]: Start difference. First operand 402530 states and 626512 transitions. Second operand 4 states. [2020-08-22 17:24:19,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:24:19,705 INFO L93 Difference]: Finished difference Result 1182673 states and 1839027 transitions. [2020-08-22 17:24:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:24:19,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-08-22 17:24:19,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:24:21,064 INFO L225 Difference]: With dead ends: 1182673 [2020-08-22 17:24:21,064 INFO L226 Difference]: Without dead ends: 785039 [2020-08-22 17:24:21,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:24:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785039 states. [2020-08-22 17:25:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785039 to 785037. [2020-08-22 17:25:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785037 states. [2020-08-22 17:25:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785037 states to 785037 states and 1214723 transitions. [2020-08-22 17:25:53,910 INFO L78 Accepts]: Start accepts. Automaton has 785037 states and 1214723 transitions. Word has length 338 [2020-08-22 17:25:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:25:53,911 INFO L479 AbstractCegarLoop]: Abstraction has 785037 states and 1214723 transitions. [2020-08-22 17:25:53,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:25:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 785037 states and 1214723 transitions. [2020-08-22 17:25:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-08-22 17:25:54,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:25:54,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:25:54,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 17:25:54,195 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:25:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:25:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1971664460, now seen corresponding path program 1 times [2020-08-22 17:25:54,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:25:54,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724637226] [2020-08-22 17:25:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:25:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:25:54,702 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 17:25:54,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:25:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:25:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:25:55,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724637226] [2020-08-22 17:25:55,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:25:55,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:25:55,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779346543] [2020-08-22 17:25:55,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:25:55,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:25:55,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:25:55,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:25:55,878 INFO L87 Difference]: Start difference. First operand 785037 states and 1214723 transitions. Second operand 4 states.