/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:02:11,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:02:11,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:02:11,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:02:11,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:02:11,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:02:11,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:02:11,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:02:11,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:02:11,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:02:11,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:02:11,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:02:11,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:02:11,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:02:11,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:02:11,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:02:11,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:02:11,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:02:11,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:02:11,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:02:11,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:02:11,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:02:11,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:02:11,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:02:11,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:02:11,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:02:11,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:02:11,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:02:11,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:02:11,398 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:02:11,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:02:11,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:02:11,400 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:02:11,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:02:11,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:02:11,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:02:11,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:02:11,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:02:11,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:02:11,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:02:11,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:02:11,402 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:02:11,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:02:11,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:02:11,402 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:02:11,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:02:11,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:02:11,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:02:11,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:02:11,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:02:11,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:02:11,403 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:02:11,707 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:02:11,721 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:02:11,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:02:11,726 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:02:11,726 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:02:11,727 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-07-07 14:02:11,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d14cd0e/1b3e50941f45487093298703e9ea0d1d/FLAG142b63344 [2020-07-07 14:02:12,425 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:02:12,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-07-07 14:02:12,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d14cd0e/1b3e50941f45487093298703e9ea0d1d/FLAG142b63344 [2020-07-07 14:02:12,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d14cd0e/1b3e50941f45487093298703e9ea0d1d [2020-07-07 14:02:12,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:02:12,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:02:12,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:02:12,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:02:12,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:02:12,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:02:12" (1/1) ... [2020-07-07 14:02:12,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe97047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:12, skipping insertion in model container [2020-07-07 14:02:12,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:02:12" (1/1) ... [2020-07-07 14:02:12,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:02:12,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:02:13,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:02:13,133 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:02:13,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:02:13,235 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:02:13,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:13 WrapperNode [2020-07-07 14:02:13,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:02:13,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:02:13,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:02:13,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:02:13,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:13" (1/1) ... [2020-07-07 14:02:13,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:13" (1/1) ... [2020-07-07 14:02:13,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:13" (1/1) ... [2020-07-07 14:02:13,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:13" (1/1) ... [2020-07-07 14:02:13,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:13" (1/1) ... [2020-07-07 14:02:13,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:13" (1/1) ... [2020-07-07 14:02:13,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:13" (1/1) ... [2020-07-07 14:02:13,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:02:13,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:02:13,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:02:13,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:02:13,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:13" (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 [2020-07-07 14:02:13,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:02:13,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:02:13,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:02:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:02:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-07 14:02:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-07 14:02:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:02:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:02:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 14:02:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 14:02:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 14:02:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-07 14:02:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 14:02:13,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:02:13,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:02:13,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 14:02:13,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 14:02:14,325 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:02:14,325 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 14:02:14,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:02:14 BoogieIcfgContainer [2020-07-07 14:02:14,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:02:14,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:02:14,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:02:14,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:02:14,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:02:12" (1/3) ... [2020-07-07 14:02:14,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2713c37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:02:14, skipping insertion in model container [2020-07-07 14:02:14,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:13" (2/3) ... [2020-07-07 14:02:14,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2713c37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:02:14, skipping insertion in model container [2020-07-07 14:02:14,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:02:14" (3/3) ... [2020-07-07 14:02:14,352 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-07-07 14:02:14,363 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:02:14,375 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:02:14,389 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:02:14,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:02:14,410 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:02:14,410 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:02:14,410 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:02:14,411 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:02:14,411 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:02:14,411 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:02:14,411 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:02:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states. [2020-07-07 14:02:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-07-07 14:02:14,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:14,461 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] [2020-07-07 14:02:14,462 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:14,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1683722235, now seen corresponding path program 1 times [2020-07-07 14:02:14,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:14,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813620073] [2020-07-07 14:02:14,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:15,376 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:15,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813620073] [2020-07-07 14:02:15,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:15,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:02:15,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980845684] [2020-07-07 14:02:15,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:02:15,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:02:15,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:02:15,420 INFO L87 Difference]: Start difference. First operand 363 states. Second operand 5 states. [2020-07-07 14:02:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:16,510 INFO L93 Difference]: Finished difference Result 416 states and 424 transitions. [2020-07-07 14:02:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 14:02:16,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-07-07 14:02:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:16,530 INFO L225 Difference]: With dead ends: 416 [2020-07-07 14:02:16,531 INFO L226 Difference]: Without dead ends: 349 [2020-07-07 14:02:16,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:02:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-07-07 14:02:16,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2020-07-07 14:02:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-07-07 14:02:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2020-07-07 14:02:16,620 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 317 [2020-07-07 14:02:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:16,622 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2020-07-07 14:02:16,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:02:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2020-07-07 14:02:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-07 14:02:16,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:16,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:16,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:02:16,634 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash 346805738, now seen corresponding path program 1 times [2020-07-07 14:02:16,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:16,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117184404] [2020-07-07 14:02:16,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:17,311 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:17,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117184404] [2020-07-07 14:02:17,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:17,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 14:02:17,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815853913] [2020-07-07 14:02:17,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 14:02:17,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:17,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 14:02:17,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:02:17,320 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 6 states. [2020-07-07 14:02:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:18,531 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2020-07-07 14:02:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 14:02:18,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-07-07 14:02:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:18,542 INFO L225 Difference]: With dead ends: 374 [2020-07-07 14:02:18,542 INFO L226 Difference]: Without dead ends: 366 [2020-07-07 14:02:18,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:02:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-07-07 14:02:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2020-07-07 14:02:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-07 14:02:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2020-07-07 14:02:18,632 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 334 [2020-07-07 14:02:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:18,634 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2020-07-07 14:02:18,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 14:02:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2020-07-07 14:02:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-07 14:02:18,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:18,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:18,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:02:18,643 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash -461354021, now seen corresponding path program 2 times [2020-07-07 14:02:18,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:18,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917277608] [2020-07-07 14:02:18,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:19,139 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:19,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917277608] [2020-07-07 14:02:19,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:19,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:02:19,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179126099] [2020-07-07 14:02:19,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:02:19,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:02:19,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:02:19,143 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 7 states. [2020-07-07 14:02:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:20,154 INFO L93 Difference]: Finished difference Result 391 states and 391 transitions. [2020-07-07 14:02:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 14:02:20,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-07-07 14:02:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:20,159 INFO L225 Difference]: With dead ends: 391 [2020-07-07 14:02:20,159 INFO L226 Difference]: Without dead ends: 383 [2020-07-07 14:02:20,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:02:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-07-07 14:02:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2020-07-07 14:02:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-07-07 14:02:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 369 transitions. [2020-07-07 14:02:20,213 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 369 transitions. Word has length 351 [2020-07-07 14:02:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:20,214 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 369 transitions. [2020-07-07 14:02:20,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:02:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 369 transitions. [2020-07-07 14:02:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-07-07 14:02:20,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:20,222 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:20,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:02:20,223 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:20,224 INFO L82 PathProgramCache]: Analyzing trace with hash -254126582, now seen corresponding path program 3 times [2020-07-07 14:02:20,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:20,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004879596] [2020-07-07 14:02:20,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:20,688 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:20,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004879596] [2020-07-07 14:02:20,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:20,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 14:02:20,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556784230] [2020-07-07 14:02:20,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 14:02:20,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 14:02:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:02:20,692 INFO L87 Difference]: Start difference. First operand 369 states and 369 transitions. Second operand 8 states. [2020-07-07 14:02:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:21,710 INFO L93 Difference]: Finished difference Result 408 states and 408 transitions. [2020-07-07 14:02:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:02:21,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-07-07 14:02:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:21,714 INFO L225 Difference]: With dead ends: 408 [2020-07-07 14:02:21,714 INFO L226 Difference]: Without dead ends: 400 [2020-07-07 14:02:21,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:02:21,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-07-07 14:02:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2020-07-07 14:02:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-07-07 14:02:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 386 transitions. [2020-07-07 14:02:21,779 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 386 transitions. Word has length 368 [2020-07-07 14:02:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:21,780 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 386 transitions. [2020-07-07 14:02:21,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 14:02:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 386 transitions. [2020-07-07 14:02:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-07-07 14:02:21,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:21,787 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:21,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:02:21,788 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:21,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:21,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1386344517, now seen corresponding path program 4 times [2020-07-07 14:02:21,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:21,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647074666] [2020-07-07 14:02:21,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:22,326 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:22,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647074666] [2020-07-07 14:02:22,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:22,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:02:22,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497746413] [2020-07-07 14:02:22,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:02:22,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:22,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:02:22,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:02:22,329 INFO L87 Difference]: Start difference. First operand 386 states and 386 transitions. Second operand 9 states. [2020-07-07 14:02:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:23,472 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2020-07-07 14:02:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 14:02:23,473 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 385 [2020-07-07 14:02:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:23,476 INFO L225 Difference]: With dead ends: 425 [2020-07-07 14:02:23,477 INFO L226 Difference]: Without dead ends: 417 [2020-07-07 14:02:23,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:02:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-07-07 14:02:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 403. [2020-07-07 14:02:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-07-07 14:02:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2020-07-07 14:02:23,542 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 385 [2020-07-07 14:02:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:23,544 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2020-07-07 14:02:23,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:02:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2020-07-07 14:02:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-07 14:02:23,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:23,548 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:23,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 14:02:23,548 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2088816170, now seen corresponding path program 5 times [2020-07-07 14:02:23,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:23,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533352277] [2020-07-07 14:02:23,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:24,072 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:24,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533352277] [2020-07-07 14:02:24,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:24,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 14:02:24,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893819482] [2020-07-07 14:02:24,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 14:02:24,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:24,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 14:02:24,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:02:24,075 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 10 states. [2020-07-07 14:02:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:25,375 INFO L93 Difference]: Finished difference Result 442 states and 442 transitions. [2020-07-07 14:02:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 14:02:25,378 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 402 [2020-07-07 14:02:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:25,381 INFO L225 Difference]: With dead ends: 442 [2020-07-07 14:02:25,383 INFO L226 Difference]: Without dead ends: 434 [2020-07-07 14:02:25,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-07-07 14:02:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-07-07 14:02:25,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-07-07 14:02:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-07-07 14:02:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 420 transitions. [2020-07-07 14:02:25,449 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 420 transitions. Word has length 402 [2020-07-07 14:02:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:25,450 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 420 transitions. [2020-07-07 14:02:25,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 14:02:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 420 transitions. [2020-07-07 14:02:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-07-07 14:02:25,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:25,454 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:25,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 14:02:25,454 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:25,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:25,455 INFO L82 PathProgramCache]: Analyzing trace with hash 380820379, now seen corresponding path program 6 times [2020-07-07 14:02:25,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:25,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278112191] [2020-07-07 14:02:25,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:25,918 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:25,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278112191] [2020-07-07 14:02:25,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:25,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:02:25,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010643974] [2020-07-07 14:02:25,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:02:25,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:25,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:02:25,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:02:25,920 INFO L87 Difference]: Start difference. First operand 420 states and 420 transitions. Second operand 11 states. [2020-07-07 14:02:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:27,469 INFO L93 Difference]: Finished difference Result 459 states and 459 transitions. [2020-07-07 14:02:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 14:02:27,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 419 [2020-07-07 14:02:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:27,476 INFO L225 Difference]: With dead ends: 459 [2020-07-07 14:02:27,477 INFO L226 Difference]: Without dead ends: 451 [2020-07-07 14:02:27,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:02:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-07-07 14:02:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 437. [2020-07-07 14:02:27,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-07-07 14:02:27,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 437 transitions. [2020-07-07 14:02:27,545 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 437 transitions. Word has length 419 [2020-07-07 14:02:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:27,546 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 437 transitions. [2020-07-07 14:02:27,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:02:27,546 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 437 transitions. [2020-07-07 14:02:27,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-07 14:02:27,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:27,550 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:27,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 14:02:27,550 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash 329334346, now seen corresponding path program 7 times [2020-07-07 14:02:27,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:27,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906022137] [2020-07-07 14:02:27,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:28,053 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:28,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906022137] [2020-07-07 14:02:28,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:28,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 14:02:28,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688053297] [2020-07-07 14:02:28,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 14:02:28,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 14:02:28,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:02:28,090 INFO L87 Difference]: Start difference. First operand 437 states and 437 transitions. Second operand 12 states. [2020-07-07 14:02:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:29,541 INFO L93 Difference]: Finished difference Result 476 states and 476 transitions. [2020-07-07 14:02:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 14:02:29,541 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 436 [2020-07-07 14:02:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:29,545 INFO L225 Difference]: With dead ends: 476 [2020-07-07 14:02:29,546 INFO L226 Difference]: Without dead ends: 468 [2020-07-07 14:02:29,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-07-07 14:02:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-07-07 14:02:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2020-07-07 14:02:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-07-07 14:02:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 454 transitions. [2020-07-07 14:02:29,610 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 454 transitions. Word has length 436 [2020-07-07 14:02:29,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:29,611 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 454 transitions. [2020-07-07 14:02:29,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 14:02:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 454 transitions. [2020-07-07 14:02:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-07-07 14:02:29,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:29,614 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:29,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 14:02:29,615 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:29,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:29,615 INFO L82 PathProgramCache]: Analyzing trace with hash 146583419, now seen corresponding path program 8 times [2020-07-07 14:02:29,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:29,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541681131] [2020-07-07 14:02:29,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:30,202 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:30,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541681131] [2020-07-07 14:02:30,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:30,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 14:02:30,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223993691] [2020-07-07 14:02:30,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 14:02:30,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:30,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 14:02:30,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:02:30,206 INFO L87 Difference]: Start difference. First operand 454 states and 454 transitions. Second operand 13 states. [2020-07-07 14:02:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:31,859 INFO L93 Difference]: Finished difference Result 493 states and 493 transitions. [2020-07-07 14:02:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 14:02:31,860 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 453 [2020-07-07 14:02:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:31,864 INFO L225 Difference]: With dead ends: 493 [2020-07-07 14:02:31,864 INFO L226 Difference]: Without dead ends: 485 [2020-07-07 14:02:31,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-07-07 14:02:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-07-07 14:02:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 471. [2020-07-07 14:02:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-07-07 14:02:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 471 transitions. [2020-07-07 14:02:31,943 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 471 transitions. Word has length 453 [2020-07-07 14:02:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:31,944 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 471 transitions. [2020-07-07 14:02:31,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 14:02:31,944 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 471 transitions. [2020-07-07 14:02:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-07 14:02:31,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:31,948 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:31,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 14:02:31,949 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:31,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1849842070, now seen corresponding path program 9 times [2020-07-07 14:02:31,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:31,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151253625] [2020-07-07 14:02:31,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:32,718 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:32,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151253625] [2020-07-07 14:02:32,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:32,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 14:02:32,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101423271] [2020-07-07 14:02:32,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 14:02:32,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:32,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 14:02:32,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:02:32,721 INFO L87 Difference]: Start difference. First operand 471 states and 471 transitions. Second operand 14 states. [2020-07-07 14:02:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:34,596 INFO L93 Difference]: Finished difference Result 510 states and 510 transitions. [2020-07-07 14:02:34,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 14:02:34,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 470 [2020-07-07 14:02:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:34,604 INFO L225 Difference]: With dead ends: 510 [2020-07-07 14:02:34,604 INFO L226 Difference]: Without dead ends: 502 [2020-07-07 14:02:34,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-07-07 14:02:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-07-07 14:02:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 488. [2020-07-07 14:02:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-07-07 14:02:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 488 transitions. [2020-07-07 14:02:34,672 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 488 transitions. Word has length 470 [2020-07-07 14:02:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:34,673 INFO L479 AbstractCegarLoop]: Abstraction has 488 states and 488 transitions. [2020-07-07 14:02:34,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 14:02:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 488 transitions. [2020-07-07 14:02:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-07 14:02:34,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:34,678 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:34,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 14:02:34,678 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:34,679 INFO L82 PathProgramCache]: Analyzing trace with hash -600208549, now seen corresponding path program 10 times [2020-07-07 14:02:34,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:34,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058970572] [2020-07-07 14:02:34,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:35,404 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:35,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058970572] [2020-07-07 14:02:35,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:35,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 14:02:35,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778479507] [2020-07-07 14:02:35,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 14:02:35,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:35,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 14:02:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:02:35,406 INFO L87 Difference]: Start difference. First operand 488 states and 488 transitions. Second operand 15 states. [2020-07-07 14:02:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:37,397 INFO L93 Difference]: Finished difference Result 527 states and 527 transitions. [2020-07-07 14:02:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 14:02:37,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 487 [2020-07-07 14:02:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:37,402 INFO L225 Difference]: With dead ends: 527 [2020-07-07 14:02:37,403 INFO L226 Difference]: Without dead ends: 519 [2020-07-07 14:02:37,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-07-07 14:02:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-07-07 14:02:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 505. [2020-07-07 14:02:37,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-07-07 14:02:37,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 505 transitions. [2020-07-07 14:02:37,486 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 505 transitions. Word has length 487 [2020-07-07 14:02:37,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:37,487 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 505 transitions. [2020-07-07 14:02:37,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 14:02:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 505 transitions. [2020-07-07 14:02:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-07 14:02:37,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:37,492 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:37,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 14:02:37,493 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1909982858, now seen corresponding path program 11 times [2020-07-07 14:02:37,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:37,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067940717] [2020-07-07 14:02:37,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:38,270 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:38,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067940717] [2020-07-07 14:02:38,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:38,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-07 14:02:38,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660398217] [2020-07-07 14:02:38,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 14:02:38,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:38,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 14:02:38,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-07 14:02:38,272 INFO L87 Difference]: Start difference. First operand 505 states and 505 transitions. Second operand 16 states. [2020-07-07 14:02:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:40,516 INFO L93 Difference]: Finished difference Result 544 states and 544 transitions. [2020-07-07 14:02:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 14:02:40,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 504 [2020-07-07 14:02:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:40,523 INFO L225 Difference]: With dead ends: 544 [2020-07-07 14:02:40,523 INFO L226 Difference]: Without dead ends: 536 [2020-07-07 14:02:40,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-07-07 14:02:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-07-07 14:02:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-07-07 14:02:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-07-07 14:02:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 522 transitions. [2020-07-07 14:02:40,605 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 522 transitions. Word has length 504 [2020-07-07 14:02:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:40,606 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 522 transitions. [2020-07-07 14:02:40,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 14:02:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 522 transitions. [2020-07-07 14:02:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-07-07 14:02:40,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:40,611 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:40,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 14:02:40,611 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:40,612 INFO L82 PathProgramCache]: Analyzing trace with hash 979857211, now seen corresponding path program 12 times [2020-07-07 14:02:40,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:40,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368963940] [2020-07-07 14:02:40,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:41,651 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:41,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368963940] [2020-07-07 14:02:41,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:41,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-07 14:02:41,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577839798] [2020-07-07 14:02:41,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 14:02:41,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:41,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 14:02:41,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-07 14:02:41,657 INFO L87 Difference]: Start difference. First operand 522 states and 522 transitions. Second operand 17 states. [2020-07-07 14:02:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:44,272 INFO L93 Difference]: Finished difference Result 561 states and 561 transitions. [2020-07-07 14:02:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 14:02:44,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 521 [2020-07-07 14:02:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:44,276 INFO L225 Difference]: With dead ends: 561 [2020-07-07 14:02:44,277 INFO L226 Difference]: Without dead ends: 553 [2020-07-07 14:02:44,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:02:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-07-07 14:02:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 539. [2020-07-07 14:02:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-07-07 14:02:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 539 transitions. [2020-07-07 14:02:44,365 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 539 transitions. Word has length 521 [2020-07-07 14:02:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:44,366 INFO L479 AbstractCegarLoop]: Abstraction has 539 states and 539 transitions. [2020-07-07 14:02:44,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 14:02:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 539 transitions. [2020-07-07 14:02:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-07-07 14:02:44,370 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:44,371 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:44,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 14:02:44,371 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:44,372 INFO L82 PathProgramCache]: Analyzing trace with hash -294494550, now seen corresponding path program 13 times [2020-07-07 14:02:44,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:44,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558685277] [2020-07-07 14:02:44,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:45,211 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:45,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558685277] [2020-07-07 14:02:45,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:45,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-07 14:02:45,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943734415] [2020-07-07 14:02:45,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 14:02:45,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:45,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 14:02:45,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-07 14:02:45,213 INFO L87 Difference]: Start difference. First operand 539 states and 539 transitions. Second operand 18 states. [2020-07-07 14:02:47,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:47,748 INFO L93 Difference]: Finished difference Result 578 states and 578 transitions. [2020-07-07 14:02:47,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 14:02:47,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 538 [2020-07-07 14:02:47,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:47,752 INFO L225 Difference]: With dead ends: 578 [2020-07-07 14:02:47,752 INFO L226 Difference]: Without dead ends: 570 [2020-07-07 14:02:47,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 14:02:47,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-07-07 14:02:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 556. [2020-07-07 14:02:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-07-07 14:02:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 556 transitions. [2020-07-07 14:02:47,851 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 556 transitions. Word has length 538 [2020-07-07 14:02:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:47,852 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 556 transitions. [2020-07-07 14:02:47,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 14:02:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 556 transitions. [2020-07-07 14:02:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2020-07-07 14:02:47,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:47,857 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:47,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 14:02:47,857 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash -50046181, now seen corresponding path program 14 times [2020-07-07 14:02:47,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:47,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658174123] [2020-07-07 14:02:47,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:48,789 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:48,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658174123] [2020-07-07 14:02:48,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:48,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-07-07 14:02:48,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072258227] [2020-07-07 14:02:48,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 14:02:48,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 14:02:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:02:48,791 INFO L87 Difference]: Start difference. First operand 556 states and 556 transitions. Second operand 19 states. [2020-07-07 14:02:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:51,619 INFO L93 Difference]: Finished difference Result 595 states and 595 transitions. [2020-07-07 14:02:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 14:02:51,620 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 555 [2020-07-07 14:02:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:51,624 INFO L225 Difference]: With dead ends: 595 [2020-07-07 14:02:51,624 INFO L226 Difference]: Without dead ends: 587 [2020-07-07 14:02:51,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 14:02:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-07-07 14:02:51,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 573. [2020-07-07 14:02:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-07-07 14:02:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 573 transitions. [2020-07-07 14:02:51,719 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 573 transitions. Word has length 555 [2020-07-07 14:02:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:51,719 INFO L479 AbstractCegarLoop]: Abstraction has 573 states and 573 transitions. [2020-07-07 14:02:51,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 14:02:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 573 transitions. [2020-07-07 14:02:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-07-07 14:02:51,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:51,723 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:51,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 14:02:51,723 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:51,724 INFO L82 PathProgramCache]: Analyzing trace with hash 562998986, now seen corresponding path program 15 times [2020-07-07 14:02:51,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:51,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049655335] [2020-07-07 14:02:51,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:52,699 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:52,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049655335] [2020-07-07 14:02:52,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:52,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-07-07 14:02:52,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623974081] [2020-07-07 14:02:52,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 14:02:52,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:52,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 14:02:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-07 14:02:52,701 INFO L87 Difference]: Start difference. First operand 573 states and 573 transitions. Second operand 20 states. [2020-07-07 14:02:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:55,809 INFO L93 Difference]: Finished difference Result 612 states and 612 transitions. [2020-07-07 14:02:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 14:02:55,810 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 572 [2020-07-07 14:02:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:55,813 INFO L225 Difference]: With dead ends: 612 [2020-07-07 14:02:55,813 INFO L226 Difference]: Without dead ends: 604 [2020-07-07 14:02:55,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 14:02:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-07-07 14:02:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 590. [2020-07-07 14:02:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-07 14:02:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 590 transitions. [2020-07-07 14:02:55,965 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 590 transitions. Word has length 572 [2020-07-07 14:02:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:55,966 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 590 transitions. [2020-07-07 14:02:55,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 14:02:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 590 transitions. [2020-07-07 14:02:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2020-07-07 14:02:55,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:55,972 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:55,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 14:02:55,972 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash 240013051, now seen corresponding path program 16 times [2020-07-07 14:02:55,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:55,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307832029] [2020-07-07 14:02:55,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:56,842 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-07 14:02:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:57,118 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:57,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307832029] [2020-07-07 14:02:57,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:57,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-07-07 14:02:57,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317182514] [2020-07-07 14:02:57,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 14:02:57,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:57,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 14:02:57,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-07 14:02:57,121 INFO L87 Difference]: Start difference. First operand 590 states and 590 transitions. Second operand 21 states. [2020-07-07 14:03:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:00,506 INFO L93 Difference]: Finished difference Result 629 states and 629 transitions. [2020-07-07 14:03:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 14:03:00,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 589 [2020-07-07 14:03:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:00,515 INFO L225 Difference]: With dead ends: 629 [2020-07-07 14:03:00,516 INFO L226 Difference]: Without dead ends: 621 [2020-07-07 14:03:00,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 14:03:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-07-07 14:03:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 607. [2020-07-07 14:03:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2020-07-07 14:03:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 607 transitions. [2020-07-07 14:03:00,633 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 607 transitions. Word has length 589 [2020-07-07 14:03:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:00,634 INFO L479 AbstractCegarLoop]: Abstraction has 607 states and 607 transitions. [2020-07-07 14:03:00,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 14:03:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 607 transitions. [2020-07-07 14:03:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2020-07-07 14:03:00,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:00,637 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:00,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 14:03:00,638 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:00,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:00,638 INFO L82 PathProgramCache]: Analyzing trace with hash 615446250, now seen corresponding path program 17 times [2020-07-07 14:03:00,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:00,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476060219] [2020-07-07 14:03:00,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:02,111 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:02,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476060219] [2020-07-07 14:03:02,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:02,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-07-07 14:03:02,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229198830] [2020-07-07 14:03:02,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 14:03:02,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:02,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 14:03:02,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-07 14:03:02,113 INFO L87 Difference]: Start difference. First operand 607 states and 607 transitions. Second operand 22 states. [2020-07-07 14:03:05,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:05,736 INFO L93 Difference]: Finished difference Result 646 states and 646 transitions. [2020-07-07 14:03:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 14:03:05,737 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 606 [2020-07-07 14:03:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:05,741 INFO L225 Difference]: With dead ends: 646 [2020-07-07 14:03:05,741 INFO L226 Difference]: Without dead ends: 638 [2020-07-07 14:03:05,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 14:03:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-07-07 14:03:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 624. [2020-07-07 14:03:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-07-07 14:03:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 624 transitions. [2020-07-07 14:03:05,873 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 624 transitions. Word has length 606 [2020-07-07 14:03:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:05,873 INFO L479 AbstractCegarLoop]: Abstraction has 624 states and 624 transitions. [2020-07-07 14:03:05,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 14:03:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 624 transitions. [2020-07-07 14:03:05,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2020-07-07 14:03:05,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:05,878 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:05,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 14:03:05,879 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:05,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:05,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1224952539, now seen corresponding path program 18 times [2020-07-07 14:03:05,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:05,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224930027] [2020-07-07 14:03:05,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:07,289 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:07,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224930027] [2020-07-07 14:03:07,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:07,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-07-07 14:03:07,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091114349] [2020-07-07 14:03:07,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 14:03:07,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 14:03:07,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-07 14:03:07,291 INFO L87 Difference]: Start difference. First operand 624 states and 624 transitions. Second operand 23 states. [2020-07-07 14:03:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:11,277 INFO L93 Difference]: Finished difference Result 663 states and 663 transitions. [2020-07-07 14:03:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 14:03:11,277 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 623 [2020-07-07 14:03:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:11,281 INFO L225 Difference]: With dead ends: 663 [2020-07-07 14:03:11,281 INFO L226 Difference]: Without dead ends: 655 [2020-07-07 14:03:11,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 14:03:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-07-07 14:03:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 641. [2020-07-07 14:03:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-07-07 14:03:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 641 transitions. [2020-07-07 14:03:11,422 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 641 transitions. Word has length 623 [2020-07-07 14:03:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:11,423 INFO L479 AbstractCegarLoop]: Abstraction has 641 states and 641 transitions. [2020-07-07 14:03:11,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 14:03:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 641 transitions. [2020-07-07 14:03:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2020-07-07 14:03:11,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:11,429 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:11,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 14:03:11,430 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:11,430 INFO L82 PathProgramCache]: Analyzing trace with hash 819279626, now seen corresponding path program 19 times [2020-07-07 14:03:11,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:11,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045168323] [2020-07-07 14:03:11,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:13,387 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:13,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045168323] [2020-07-07 14:03:13,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:13,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-07-07 14:03:13,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579683646] [2020-07-07 14:03:13,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 14:03:13,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:13,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 14:03:13,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-07-07 14:03:13,389 INFO L87 Difference]: Start difference. First operand 641 states and 641 transitions. Second operand 24 states. [2020-07-07 14:03:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:17,707 INFO L93 Difference]: Finished difference Result 680 states and 680 transitions. [2020-07-07 14:03:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-07 14:03:17,707 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 640 [2020-07-07 14:03:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:17,711 INFO L225 Difference]: With dead ends: 680 [2020-07-07 14:03:17,711 INFO L226 Difference]: Without dead ends: 672 [2020-07-07 14:03:17,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 14:03:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2020-07-07 14:03:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 658. [2020-07-07 14:03:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-07-07 14:03:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 658 transitions. [2020-07-07 14:03:17,888 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 658 transitions. Word has length 640 [2020-07-07 14:03:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:17,889 INFO L479 AbstractCegarLoop]: Abstraction has 658 states and 658 transitions. [2020-07-07 14:03:17,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 14:03:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 658 transitions. [2020-07-07 14:03:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2020-07-07 14:03:17,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:17,895 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:17,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 14:03:17,895 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1482772155, now seen corresponding path program 20 times [2020-07-07 14:03:17,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:17,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283452018] [2020-07-07 14:03:17,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:19,404 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:19,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283452018] [2020-07-07 14:03:19,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:19,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-07-07 14:03:19,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316636669] [2020-07-07 14:03:19,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 14:03:19,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:19,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 14:03:19,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-07 14:03:19,406 INFO L87 Difference]: Start difference. First operand 658 states and 658 transitions. Second operand 25 states. [2020-07-07 14:03:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:23,982 INFO L93 Difference]: Finished difference Result 697 states and 697 transitions. [2020-07-07 14:03:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 14:03:23,983 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 657 [2020-07-07 14:03:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:23,988 INFO L225 Difference]: With dead ends: 697 [2020-07-07 14:03:23,988 INFO L226 Difference]: Without dead ends: 689 [2020-07-07 14:03:23,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-07-07 14:03:23,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2020-07-07 14:03:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 675. [2020-07-07 14:03:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2020-07-07 14:03:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 675 transitions. [2020-07-07 14:03:24,232 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 675 transitions. Word has length 657 [2020-07-07 14:03:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:24,232 INFO L479 AbstractCegarLoop]: Abstraction has 675 states and 675 transitions. [2020-07-07 14:03:24,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 14:03:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 675 transitions. [2020-07-07 14:03:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-07-07 14:03:24,240 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:24,240 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:24,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 14:03:24,240 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1098682582, now seen corresponding path program 21 times [2020-07-07 14:03:24,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:24,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476814082] [2020-07-07 14:03:24,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:25,997 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:25,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476814082] [2020-07-07 14:03:25,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:25,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-07-07 14:03:25,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175246524] [2020-07-07 14:03:25,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 14:03:25,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:25,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 14:03:25,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-07-07 14:03:25,999 INFO L87 Difference]: Start difference. First operand 675 states and 675 transitions. Second operand 26 states. [2020-07-07 14:03:30,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:30,917 INFO L93 Difference]: Finished difference Result 714 states and 714 transitions. [2020-07-07 14:03:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-07 14:03:30,922 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 674 [2020-07-07 14:03:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:30,925 INFO L225 Difference]: With dead ends: 714 [2020-07-07 14:03:30,925 INFO L226 Difference]: Without dead ends: 706 [2020-07-07 14:03:30,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 14:03:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2020-07-07 14:03:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 692. [2020-07-07 14:03:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-07-07 14:03:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 692 transitions. [2020-07-07 14:03:31,089 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 692 transitions. Word has length 674 [2020-07-07 14:03:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:31,090 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 692 transitions. [2020-07-07 14:03:31,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 14:03:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 692 transitions. [2020-07-07 14:03:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2020-07-07 14:03:31,096 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:31,096 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:31,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 14:03:31,097 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:31,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1742316901, now seen corresponding path program 22 times [2020-07-07 14:03:31,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:31,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245449555] [2020-07-07 14:03:31,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:32,845 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:32,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245449555] [2020-07-07 14:03:32,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:32,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-07-07 14:03:32,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589664274] [2020-07-07 14:03:32,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-07 14:03:32,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-07 14:03:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-07-07 14:03:32,847 INFO L87 Difference]: Start difference. First operand 692 states and 692 transitions. Second operand 27 states. [2020-07-07 14:03:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:37,999 INFO L93 Difference]: Finished difference Result 731 states and 731 transitions. [2020-07-07 14:03:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 14:03:38,000 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 691 [2020-07-07 14:03:38,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:38,004 INFO L225 Difference]: With dead ends: 731 [2020-07-07 14:03:38,004 INFO L226 Difference]: Without dead ends: 723 [2020-07-07 14:03:38,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 14:03:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2020-07-07 14:03:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 709. [2020-07-07 14:03:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2020-07-07 14:03:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 709 transitions. [2020-07-07 14:03:38,159 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 709 transitions. Word has length 691 [2020-07-07 14:03:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:38,160 INFO L479 AbstractCegarLoop]: Abstraction has 709 states and 709 transitions. [2020-07-07 14:03:38,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-07 14:03:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 709 transitions. [2020-07-07 14:03:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-07-07 14:03:38,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:38,167 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:38,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 14:03:38,167 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:38,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1514430646, now seen corresponding path program 23 times [2020-07-07 14:03:38,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:38,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280777979] [2020-07-07 14:03:38,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:40,165 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:40,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280777979] [2020-07-07 14:03:40,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:40,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-07-07 14:03:40,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870710489] [2020-07-07 14:03:40,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-07 14:03:40,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-07 14:03:40,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-07-07 14:03:40,167 INFO L87 Difference]: Start difference. First operand 709 states and 709 transitions. Second operand 28 states. [2020-07-07 14:03:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:46,008 INFO L93 Difference]: Finished difference Result 748 states and 748 transitions. [2020-07-07 14:03:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-07 14:03:46,009 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 708 [2020-07-07 14:03:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:46,012 INFO L225 Difference]: With dead ends: 748 [2020-07-07 14:03:46,012 INFO L226 Difference]: Without dead ends: 740 [2020-07-07 14:03:46,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-07-07 14:03:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2020-07-07 14:03:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 726. [2020-07-07 14:03:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 726 states. [2020-07-07 14:03:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 726 transitions. [2020-07-07 14:03:46,215 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 726 transitions. Word has length 708 [2020-07-07 14:03:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:46,216 INFO L479 AbstractCegarLoop]: Abstraction has 726 states and 726 transitions. [2020-07-07 14:03:46,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-07 14:03:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 726 transitions. [2020-07-07 14:03:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2020-07-07 14:03:46,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:46,223 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:46,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-07 14:03:46,223 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash -191861125, now seen corresponding path program 24 times [2020-07-07 14:03:46,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:46,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247837460] [2020-07-07 14:03:46,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:48,170 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:48,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247837460] [2020-07-07 14:03:48,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:48,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-07-07 14:03:48,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072238142] [2020-07-07 14:03:48,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-07 14:03:48,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:48,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-07 14:03:48,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-07-07 14:03:48,173 INFO L87 Difference]: Start difference. First operand 726 states and 726 transitions. Second operand 29 states. [2020-07-07 14:03:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:54,275 INFO L93 Difference]: Finished difference Result 765 states and 765 transitions. [2020-07-07 14:03:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 14:03:54,276 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 725 [2020-07-07 14:03:54,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:54,280 INFO L225 Difference]: With dead ends: 765 [2020-07-07 14:03:54,280 INFO L226 Difference]: Without dead ends: 757 [2020-07-07 14:03:54,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 14:03:54,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-07-07 14:03:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 743. [2020-07-07 14:03:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-07-07 14:03:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 743 transitions. [2020-07-07 14:03:54,471 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 743 transitions. Word has length 725 [2020-07-07 14:03:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:54,472 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 743 transitions. [2020-07-07 14:03:54,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-07 14:03:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 743 transitions. [2020-07-07 14:03:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 743 [2020-07-07 14:03:54,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:54,479 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:54,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-07 14:03:54,479 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:54,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1040172906, now seen corresponding path program 25 times [2020-07-07 14:03:54,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:54,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056975160] [2020-07-07 14:03:54,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:56,536 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:56,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056975160] [2020-07-07 14:03:56,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:56,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-07-07 14:03:56,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237631915] [2020-07-07 14:03:56,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-07 14:03:56,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-07 14:03:56,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-07-07 14:03:56,538 INFO L87 Difference]: Start difference. First operand 743 states and 743 transitions. Second operand 30 states. [2020-07-07 14:04:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:03,131 INFO L93 Difference]: Finished difference Result 782 states and 782 transitions. [2020-07-07 14:04:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-07 14:04:03,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 742 [2020-07-07 14:04:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:03,136 INFO L225 Difference]: With dead ends: 782 [2020-07-07 14:04:03,136 INFO L226 Difference]: Without dead ends: 774 [2020-07-07 14:04:03,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-07-07 14:04:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-07-07 14:04:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 760. [2020-07-07 14:04:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2020-07-07 14:04:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 760 transitions. [2020-07-07 14:04:03,313 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 760 transitions. Word has length 742 [2020-07-07 14:04:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:03,314 INFO L479 AbstractCegarLoop]: Abstraction has 760 states and 760 transitions. [2020-07-07 14:04:03,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-07 14:04:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 760 transitions. [2020-07-07 14:04:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2020-07-07 14:04:03,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:03,319 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:03,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-07 14:04:03,319 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash -899839397, now seen corresponding path program 26 times [2020-07-07 14:04:03,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:03,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474379533] [2020-07-07 14:04:03,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:05,208 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:05,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474379533] [2020-07-07 14:04:05,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:05,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-07-07 14:04:05,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280827526] [2020-07-07 14:04:05,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-07 14:04:05,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:05,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-07 14:04:05,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:04:05,210 INFO L87 Difference]: Start difference. First operand 760 states and 760 transitions. Second operand 31 states. [2020-07-07 14:04:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:12,437 INFO L93 Difference]: Finished difference Result 799 states and 799 transitions. [2020-07-07 14:04:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-07 14:04:12,438 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 759 [2020-07-07 14:04:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:12,442 INFO L225 Difference]: With dead ends: 799 [2020-07-07 14:04:12,442 INFO L226 Difference]: Without dead ends: 791 [2020-07-07 14:04:12,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-07-07 14:04:12,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2020-07-07 14:04:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 777. [2020-07-07 14:04:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2020-07-07 14:04:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 777 transitions. [2020-07-07 14:04:12,639 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 777 transitions. Word has length 759 [2020-07-07 14:04:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:12,640 INFO L479 AbstractCegarLoop]: Abstraction has 777 states and 777 transitions. [2020-07-07 14:04:12,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-07 14:04:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 777 transitions. [2020-07-07 14:04:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2020-07-07 14:04:12,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:12,648 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:12,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-07 14:04:12,649 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2119296906, now seen corresponding path program 27 times [2020-07-07 14:04:12,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:12,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552066895] [2020-07-07 14:04:12,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:14,839 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:14,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552066895] [2020-07-07 14:04:14,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:14,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-07-07 14:04:14,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045523972] [2020-07-07 14:04:14,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-07 14:04:14,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:14,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-07 14:04:14,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-07-07 14:04:14,842 INFO L87 Difference]: Start difference. First operand 777 states and 777 transitions. Second operand 32 states. [2020-07-07 14:04:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:22,475 INFO L93 Difference]: Finished difference Result 816 states and 816 transitions. [2020-07-07 14:04:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-07 14:04:22,476 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 776 [2020-07-07 14:04:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:22,480 INFO L225 Difference]: With dead ends: 816 [2020-07-07 14:04:22,480 INFO L226 Difference]: Without dead ends: 808 [2020-07-07 14:04:22,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 14:04:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2020-07-07 14:04:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 794. [2020-07-07 14:04:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-07-07 14:04:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 794 transitions. [2020-07-07 14:04:22,692 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 794 transitions. Word has length 776 [2020-07-07 14:04:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:22,693 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 794 transitions. [2020-07-07 14:04:22,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-07 14:04:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 794 transitions. [2020-07-07 14:04:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2020-07-07 14:04:22,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:22,698 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:22,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-07 14:04:22,699 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash -959730117, now seen corresponding path program 28 times [2020-07-07 14:04:22,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:22,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648436689] [2020-07-07 14:04:22,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:24,976 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:24,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648436689] [2020-07-07 14:04:24,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:24,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-07-07 14:04:24,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789037731] [2020-07-07 14:04:24,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-07 14:04:24,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:24,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-07 14:04:24,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 14:04:24,979 INFO L87 Difference]: Start difference. First operand 794 states and 794 transitions. Second operand 33 states. [2020-07-07 14:04:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:33,687 INFO L93 Difference]: Finished difference Result 833 states and 833 transitions. [2020-07-07 14:04:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-07 14:04:33,688 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 793 [2020-07-07 14:04:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:33,692 INFO L225 Difference]: With dead ends: 833 [2020-07-07 14:04:33,692 INFO L226 Difference]: Without dead ends: 825 [2020-07-07 14:04:33,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-07-07 14:04:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2020-07-07 14:04:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 811. [2020-07-07 14:04:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-07-07 14:04:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 811 transitions. [2020-07-07 14:04:33,895 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 811 transitions. Word has length 793 [2020-07-07 14:04:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:33,896 INFO L479 AbstractCegarLoop]: Abstraction has 811 states and 811 transitions. [2020-07-07 14:04:33,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-07 14:04:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 811 transitions. [2020-07-07 14:04:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2020-07-07 14:04:33,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:33,901 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:33,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-07 14:04:33,901 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:33,902 INFO L82 PathProgramCache]: Analyzing trace with hash 489947050, now seen corresponding path program 29 times [2020-07-07 14:04:33,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:33,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242177365] [2020-07-07 14:04:33,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:36,349 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:36,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242177365] [2020-07-07 14:04:36,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:36,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-07-07 14:04:36,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551830083] [2020-07-07 14:04:36,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-07 14:04:36,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:36,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-07 14:04:36,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 14:04:36,352 INFO L87 Difference]: Start difference. First operand 811 states and 811 transitions. Second operand 34 states. [2020-07-07 14:04:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:45,710 INFO L93 Difference]: Finished difference Result 850 states and 850 transitions. [2020-07-07 14:04:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-07 14:04:45,711 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 810 [2020-07-07 14:04:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:45,715 INFO L225 Difference]: With dead ends: 850 [2020-07-07 14:04:45,715 INFO L226 Difference]: Without dead ends: 842 [2020-07-07 14:04:45,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-07-07 14:04:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-07-07 14:04:45,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 828. [2020-07-07 14:04:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-07-07 14:04:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 828 transitions. [2020-07-07 14:04:45,936 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 828 transitions. Word has length 810 [2020-07-07 14:04:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:45,937 INFO L479 AbstractCegarLoop]: Abstraction has 828 states and 828 transitions. [2020-07-07 14:04:45,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-07 14:04:45,937 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 828 transitions. [2020-07-07 14:04:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2020-07-07 14:04:45,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:45,943 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:45,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-07 14:04:45,943 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:45,943 INFO L82 PathProgramCache]: Analyzing trace with hash -946284005, now seen corresponding path program 30 times [2020-07-07 14:04:45,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:45,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677024607] [2020-07-07 14:04:45,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:48,732 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:48,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677024607] [2020-07-07 14:04:48,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:48,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-07-07 14:04:48,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283544694] [2020-07-07 14:04:48,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-07 14:04:48,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:48,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-07 14:04:48,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 14:04:48,735 INFO L87 Difference]: Start difference. First operand 828 states and 828 transitions. Second operand 35 states. [2020-07-07 14:04:59,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:59,193 INFO L93 Difference]: Finished difference Result 867 states and 867 transitions. [2020-07-07 14:04:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-07 14:04:59,195 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 827 [2020-07-07 14:04:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:59,200 INFO L225 Difference]: With dead ends: 867 [2020-07-07 14:04:59,200 INFO L226 Difference]: Without dead ends: 859 [2020-07-07 14:04:59,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 14:04:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-07-07 14:04:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 845. [2020-07-07 14:04:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 845 states. [2020-07-07 14:04:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 845 transitions. [2020-07-07 14:04:59,450 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 845 transitions. Word has length 827 [2020-07-07 14:04:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:59,451 INFO L479 AbstractCegarLoop]: Abstraction has 845 states and 845 transitions. [2020-07-07 14:04:59,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-07 14:04:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 845 transitions. [2020-07-07 14:04:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2020-07-07 14:04:59,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:59,458 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:59,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-07 14:04:59,459 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1331163190, now seen corresponding path program 31 times [2020-07-07 14:04:59,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:59,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045172245] [2020-07-07 14:04:59,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:02,492 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:02,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045172245] [2020-07-07 14:05:02,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:02,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-07-07 14:05:02,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191261113] [2020-07-07 14:05:02,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-07 14:05:02,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:02,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-07 14:05:02,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 14:05:02,495 INFO L87 Difference]: Start difference. First operand 845 states and 845 transitions. Second operand 36 states. [2020-07-07 14:05:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:14,147 INFO L93 Difference]: Finished difference Result 884 states and 884 transitions. [2020-07-07 14:05:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-07 14:05:14,149 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 844 [2020-07-07 14:05:14,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:14,153 INFO L225 Difference]: With dead ends: 884 [2020-07-07 14:05:14,153 INFO L226 Difference]: Without dead ends: 876 [2020-07-07 14:05:14,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-07-07 14:05:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-07-07 14:05:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 862. [2020-07-07 14:05:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 862 states. [2020-07-07 14:05:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 862 transitions. [2020-07-07 14:05:14,451 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 862 transitions. Word has length 844 [2020-07-07 14:05:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:14,452 INFO L479 AbstractCegarLoop]: Abstraction has 862 states and 862 transitions. [2020-07-07 14:05:14,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-07 14:05:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 862 transitions. [2020-07-07 14:05:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2020-07-07 14:05:14,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:14,461 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:14,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-07 14:05:14,461 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1157427717, now seen corresponding path program 32 times [2020-07-07 14:05:14,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:14,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611281085] [2020-07-07 14:05:14,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:17,743 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:17,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611281085] [2020-07-07 14:05:17,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:17,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-07-07 14:05:17,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934538816] [2020-07-07 14:05:17,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-07 14:05:17,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:17,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-07 14:05:17,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 14:05:17,746 INFO L87 Difference]: Start difference. First operand 862 states and 862 transitions. Second operand 37 states. [2020-07-07 14:05:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:30,414 INFO L93 Difference]: Finished difference Result 901 states and 901 transitions. [2020-07-07 14:05:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-07 14:05:30,416 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 861 [2020-07-07 14:05:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:30,421 INFO L225 Difference]: With dead ends: 901 [2020-07-07 14:05:30,421 INFO L226 Difference]: Without dead ends: 893 [2020-07-07 14:05:30,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2020-07-07 14:05:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2020-07-07 14:05:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 879. [2020-07-07 14:05:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-07-07 14:05:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 879 transitions. [2020-07-07 14:05:31,052 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 879 transitions. Word has length 861 [2020-07-07 14:05:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:31,053 INFO L479 AbstractCegarLoop]: Abstraction has 879 states and 879 transitions. [2020-07-07 14:05:31,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-07 14:05:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 879 transitions. [2020-07-07 14:05:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2020-07-07 14:05:31,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:31,060 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:31,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-07 14:05:31,060 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -835708950, now seen corresponding path program 33 times [2020-07-07 14:05:31,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:31,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256128370] [2020-07-07 14:05:31,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:34,676 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:34,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256128370] [2020-07-07 14:05:34,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:34,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-07-07 14:05:34,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963773302] [2020-07-07 14:05:34,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-07 14:05:34,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:34,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-07 14:05:34,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 14:05:34,679 INFO L87 Difference]: Start difference. First operand 879 states and 879 transitions. Second operand 38 states. [2020-07-07 14:05:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:50,364 INFO L93 Difference]: Finished difference Result 918 states and 918 transitions. [2020-07-07 14:05:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-07 14:05:50,366 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 878 [2020-07-07 14:05:50,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:50,369 INFO L225 Difference]: With dead ends: 918 [2020-07-07 14:05:50,369 INFO L226 Difference]: Without dead ends: 910 [2020-07-07 14:05:50,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2020-07-07 14:05:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2020-07-07 14:05:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 896. [2020-07-07 14:05:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-07-07 14:05:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 896 transitions. [2020-07-07 14:05:50,671 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 896 transitions. Word has length 878 [2020-07-07 14:05:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:50,672 INFO L479 AbstractCegarLoop]: Abstraction has 896 states and 896 transitions. [2020-07-07 14:05:50,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-07 14:05:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 896 transitions. [2020-07-07 14:05:50,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 896 [2020-07-07 14:05:50,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:50,679 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:50,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-07-07 14:05:50,680 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:50,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:50,680 INFO L82 PathProgramCache]: Analyzing trace with hash 2143832539, now seen corresponding path program 34 times [2020-07-07 14:05:50,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:50,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79005794] [2020-07-07 14:05:50,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:54,668 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:54,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79005794] [2020-07-07 14:05:54,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:54,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-07-07 14:05:54,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15832219] [2020-07-07 14:05:54,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-07 14:05:54,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:54,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-07 14:05:54,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 14:05:54,670 INFO L87 Difference]: Start difference. First operand 896 states and 896 transitions. Second operand 39 states. [2020-07-07 14:06:11,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:11,400 INFO L93 Difference]: Finished difference Result 935 states and 935 transitions. [2020-07-07 14:06:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-07 14:06:11,403 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 895 [2020-07-07 14:06:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:11,407 INFO L225 Difference]: With dead ends: 935 [2020-07-07 14:06:11,408 INFO L226 Difference]: Without dead ends: 927 [2020-07-07 14:06:11,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2020-07-07 14:06:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2020-07-07 14:06:11,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 913. [2020-07-07 14:06:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2020-07-07 14:06:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 913 transitions. [2020-07-07 14:06:11,737 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 913 transitions. Word has length 895 [2020-07-07 14:06:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:11,738 INFO L479 AbstractCegarLoop]: Abstraction has 913 states and 913 transitions. [2020-07-07 14:06:11,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-07 14:06:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 913 transitions. [2020-07-07 14:06:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 913 [2020-07-07 14:06:11,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:11,750 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:11,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-07-07 14:06:11,751 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:11,751 INFO L82 PathProgramCache]: Analyzing trace with hash 718149642, now seen corresponding path program 35 times [2020-07-07 14:06:11,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:11,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204452439] [2020-07-07 14:06:11,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:16,079 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:16,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204452439] [2020-07-07 14:06:16,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:16,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-07-07 14:06:16,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366193092] [2020-07-07 14:06:16,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-07 14:06:16,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:16,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-07 14:06:16,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 14:06:16,082 INFO L87 Difference]: Start difference. First operand 913 states and 913 transitions. Second operand 40 states. [2020-07-07 14:06:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:36,176 INFO L93 Difference]: Finished difference Result 952 states and 952 transitions. [2020-07-07 14:06:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-07 14:06:36,178 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 912 [2020-07-07 14:06:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:36,183 INFO L225 Difference]: With dead ends: 952 [2020-07-07 14:06:36,184 INFO L226 Difference]: Without dead ends: 944 [2020-07-07 14:06:36,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-07-07 14:06:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2020-07-07 14:06:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 930. [2020-07-07 14:06:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-07-07 14:06:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 930 transitions. [2020-07-07 14:06:36,501 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 930 transitions. Word has length 912 [2020-07-07 14:06:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:36,502 INFO L479 AbstractCegarLoop]: Abstraction has 930 states and 930 transitions. [2020-07-07 14:06:36,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-07 14:06:36,502 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 930 transitions. [2020-07-07 14:06:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 930 [2020-07-07 14:06:36,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:36,510 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:36,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-07-07 14:06:36,511 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:36,511 INFO L82 PathProgramCache]: Analyzing trace with hash -987329093, now seen corresponding path program 36 times [2020-07-07 14:06:36,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:36,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062296833] [2020-07-07 14:06:36,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:41,316 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:41,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062296833] [2020-07-07 14:06:41,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:41,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-07-07 14:06:41,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293408418] [2020-07-07 14:06:41,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-07 14:06:41,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:41,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-07 14:06:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 14:06:41,319 INFO L87 Difference]: Start difference. First operand 930 states and 930 transitions. Second operand 41 states. [2020-07-07 14:07:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:07:03,560 INFO L93 Difference]: Finished difference Result 969 states and 969 transitions. [2020-07-07 14:07:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-07 14:07:03,563 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 929 [2020-07-07 14:07:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:07:03,570 INFO L225 Difference]: With dead ends: 969 [2020-07-07 14:07:03,570 INFO L226 Difference]: Without dead ends: 961 [2020-07-07 14:07:03,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2020-07-07 14:07:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-07-07 14:07:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 947. [2020-07-07 14:07:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 947 states. [2020-07-07 14:07:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 947 transitions. [2020-07-07 14:07:03,951 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 947 transitions. Word has length 929 [2020-07-07 14:07:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:07:03,951 INFO L479 AbstractCegarLoop]: Abstraction has 947 states and 947 transitions. [2020-07-07 14:07:03,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-07 14:07:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 947 transitions. [2020-07-07 14:07:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2020-07-07 14:07:03,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:07:03,960 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:07:03,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-07-07 14:07:03,960 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:07:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:07:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1157361622, now seen corresponding path program 37 times [2020-07-07 14:07:03,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:07:03,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765528015] [2020-07-07 14:07:03,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:07:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:07:09,266 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:07:09,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765528015] [2020-07-07 14:07:09,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:07:09,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-07-07 14:07:09,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500084215] [2020-07-07 14:07:09,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-07 14:07:09,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:07:09,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-07 14:07:09,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-07-07 14:07:09,269 INFO L87 Difference]: Start difference. First operand 947 states and 947 transitions. Second operand 42 states. [2020-07-07 14:07:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:07:35,505 INFO L93 Difference]: Finished difference Result 986 states and 986 transitions. [2020-07-07 14:07:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-07 14:07:35,508 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 946 [2020-07-07 14:07:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:07:35,513 INFO L225 Difference]: With dead ends: 986 [2020-07-07 14:07:35,514 INFO L226 Difference]: Without dead ends: 978 [2020-07-07 14:07:35,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-07-07 14:07:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-07-07 14:07:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 964. [2020-07-07 14:07:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2020-07-07 14:07:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 964 transitions. [2020-07-07 14:07:35,915 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 964 transitions. Word has length 946 [2020-07-07 14:07:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:07:35,916 INFO L479 AbstractCegarLoop]: Abstraction has 964 states and 964 transitions. [2020-07-07 14:07:35,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-07 14:07:35,917 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 964 transitions. [2020-07-07 14:07:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2020-07-07 14:07:35,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:07:35,930 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:07:35,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-07-07 14:07:35,931 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:07:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:07:35,932 INFO L82 PathProgramCache]: Analyzing trace with hash -354690661, now seen corresponding path program 38 times [2020-07-07 14:07:35,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:07:35,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337764345] [2020-07-07 14:07:35,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:07:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:07:41,704 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:07:41,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337764345] [2020-07-07 14:07:41,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:07:41,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-07-07 14:07:41,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377267336] [2020-07-07 14:07:41,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-07 14:07:41,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:07:41,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-07 14:07:41,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 14:07:41,707 INFO L87 Difference]: Start difference. First operand 964 states and 964 transitions. Second operand 43 states. [2020-07-07 14:08:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:08:11,647 INFO L93 Difference]: Finished difference Result 1003 states and 1003 transitions. [2020-07-07 14:08:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-07 14:08:11,650 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 963 [2020-07-07 14:08:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:08:11,655 INFO L225 Difference]: With dead ends: 1003 [2020-07-07 14:08:11,656 INFO L226 Difference]: Without dead ends: 995 [2020-07-07 14:08:11,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2020-07-07 14:08:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2020-07-07 14:08:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 981. [2020-07-07 14:08:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-07-07 14:08:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 981 transitions. [2020-07-07 14:08:12,042 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 981 transitions. Word has length 963 [2020-07-07 14:08:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:08:12,043 INFO L479 AbstractCegarLoop]: Abstraction has 981 states and 981 transitions. [2020-07-07 14:08:12,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-07 14:08:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 981 transitions. [2020-07-07 14:08:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2020-07-07 14:08:12,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:08:12,052 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:08:12,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-07-07 14:08:12,053 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:08:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:08:12,053 INFO L82 PathProgramCache]: Analyzing trace with hash -757858230, now seen corresponding path program 39 times [2020-07-07 14:08:12,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:08:12,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782033348] [2020-07-07 14:08:12,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:08:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:08:18,076 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:08:18,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782033348] [2020-07-07 14:08:18,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:08:18,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-07-07 14:08:18,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558570255] [2020-07-07 14:08:18,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-07 14:08:18,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:08:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-07 14:08:18,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-07-07 14:08:18,078 INFO L87 Difference]: Start difference. First operand 981 states and 981 transitions. Second operand 44 states. [2020-07-07 14:08:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:08:52,567 INFO L93 Difference]: Finished difference Result 1020 states and 1020 transitions. [2020-07-07 14:08:52,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-07 14:08:52,570 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 980 [2020-07-07 14:08:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:08:52,577 INFO L225 Difference]: With dead ends: 1020 [2020-07-07 14:08:52,577 INFO L226 Difference]: Without dead ends: 1012 [2020-07-07 14:08:52,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2020-07-07 14:08:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2020-07-07 14:08:53,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 998. [2020-07-07 14:08:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 998 states. [2020-07-07 14:08:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 998 transitions. [2020-07-07 14:08:53,447 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 998 transitions. Word has length 980 [2020-07-07 14:08:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:08:53,448 INFO L479 AbstractCegarLoop]: Abstraction has 998 states and 998 transitions. [2020-07-07 14:08:53,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-07 14:08:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 998 transitions. [2020-07-07 14:08:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2020-07-07 14:08:53,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:08:53,461 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:08:53,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-07-07 14:08:53,461 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:08:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:08:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash -517591685, now seen corresponding path program 40 times [2020-07-07 14:08:53,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:08:53,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084800124] [2020-07-07 14:08:53,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:08:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:00,047 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:00,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084800124] [2020-07-07 14:09:00,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:00,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-07-07 14:09:00,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425563593] [2020-07-07 14:09:00,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-07 14:09:00,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:00,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-07 14:09:00,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 14:09:00,050 INFO L87 Difference]: Start difference. First operand 998 states and 998 transitions. Second operand 45 states. [2020-07-07 14:09:40,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:40,162 INFO L93 Difference]: Finished difference Result 1037 states and 1037 transitions. [2020-07-07 14:09:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-07 14:09:40,166 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 997 [2020-07-07 14:09:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:40,172 INFO L225 Difference]: With dead ends: 1037 [2020-07-07 14:09:40,172 INFO L226 Difference]: Without dead ends: 1029 [2020-07-07 14:09:40,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2020-07-07 14:09:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2020-07-07 14:09:40,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1015. [2020-07-07 14:09:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-07-07 14:09:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1015 transitions. [2020-07-07 14:09:40,642 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1015 transitions. Word has length 997 [2020-07-07 14:09:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:40,644 INFO L479 AbstractCegarLoop]: Abstraction has 1015 states and 1015 transitions. [2020-07-07 14:09:40,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-07 14:09:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1015 transitions. [2020-07-07 14:09:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2020-07-07 14:09:40,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:40,654 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:40,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-07-07 14:09:40,654 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:40,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1170204778, now seen corresponding path program 41 times [2020-07-07 14:09:40,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:40,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491647469] [2020-07-07 14:09:40,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:48,029 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:48,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491647469] [2020-07-07 14:09:48,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:48,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-07-07 14:09:48,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897531230] [2020-07-07 14:09:48,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-07 14:09:48,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-07 14:09:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 14:09:48,032 INFO L87 Difference]: Start difference. First operand 1015 states and 1015 transitions. Second operand 46 states. [2020-07-07 14:09:48,409 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-07 14:10:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:10:32,860 INFO L93 Difference]: Finished difference Result 1054 states and 1054 transitions. [2020-07-07 14:10:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-07 14:10:32,863 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 1014 [2020-07-07 14:10:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:10:32,870 INFO L225 Difference]: With dead ends: 1054 [2020-07-07 14:10:32,870 INFO L226 Difference]: Without dead ends: 1046 [2020-07-07 14:10:32,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2020-07-07 14:10:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2020-07-07 14:10:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1032. [2020-07-07 14:10:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-07-07 14:10:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1032 transitions. [2020-07-07 14:10:33,348 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1032 transitions. Word has length 1014 [2020-07-07 14:10:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:10:33,349 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1032 transitions. [2020-07-07 14:10:33,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-07 14:10:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1032 transitions. [2020-07-07 14:10:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2020-07-07 14:10:33,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:10:33,360 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:10:33,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-07-07 14:10:33,360 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:10:33,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:10:33,361 INFO L82 PathProgramCache]: Analyzing trace with hash 147032411, now seen corresponding path program 42 times [2020-07-07 14:10:33,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:10:33,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500141861] [2020-07-07 14:10:33,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:10:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:37,076 ERROR L253 erpolLogProxyWrapper]: Interpolant 1011 not inductive [2020-07-07 14:10:37,079 ERROR L276 FreeRefinementEngine]: Caught unknown exception: generated interpolants did not pass sanity check [2020-07-07 14:10:37,080 WARN L341 FreeRefinementEngine]: Global settings require throwing the following exception [2020-07-07 14:10:37,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-07-07 14:10:37,081 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:222) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:884) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:385) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:332) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:337) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:239) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:108) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:146) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:102) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 14:10:37,090 INFO L168 Benchmark]: Toolchain (without parser) took 504383.01 ms. Allocated memory was 138.4 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 101.6 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2020-07-07 14:10:37,091 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 14:10:37,092 INFO L168 Benchmark]: CACSL2BoogieTranslator took 528.11 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 101.4 MB in the beginning and 177.2 MB in the end (delta: -75.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-07-07 14:10:37,092 INFO L168 Benchmark]: Boogie Preprocessor took 81.52 ms. Allocated memory is still 203.4 MB. Free memory was 177.2 MB in the beginning and 173.2 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. [2020-07-07 14:10:37,093 INFO L168 Benchmark]: RCFGBuilder took 1019.29 ms. Allocated memory is still 203.4 MB. Free memory was 173.2 MB in the beginning and 101.3 MB in the end (delta: 72.0 MB). Peak memory consumption was 72.0 MB. Max. memory is 7.1 GB. [2020-07-07 14:10:37,093 INFO L168 Benchmark]: TraceAbstraction took 502747.35 ms. Allocated memory was 203.4 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 101.3 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 984.9 MB. Max. memory is 7.1 GB. [2020-07-07 14:10:37,096 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 528.11 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 101.4 MB in the beginning and 177.2 MB in the end (delta: -75.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 81.52 ms. Allocated memory is still 203.4 MB. Free memory was 177.2 MB in the beginning and 173.2 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1019.29 ms. Allocated memory is still 203.4 MB. Free memory was 173.2 MB in the beginning and 101.3 MB in the end (delta: 72.0 MB). Peak memory consumption was 72.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 502747.35 ms. Allocated memory was 203.4 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 101.3 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 984.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...