/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:05:38,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:05:38,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:05:38,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:05:38,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:05:38,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:05:38,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:05:38,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:05:38,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:05:38,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:05:38,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:05:38,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:05:38,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:05:38,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:05:38,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:05:38,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:05:38,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:05:38,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:05:38,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:05:38,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:05:38,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:05:38,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:05:38,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:05:38,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:05:38,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:05:38,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:05:38,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:05:38,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:05:38,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:05:38,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:05:38,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:05:38,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:05:38,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:05:38,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:05:38,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:05:38,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:05:38,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:05:38,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:05:38,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:05:38,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:05:38,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:05:38,413 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:05:38,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:05:38,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:05:38,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:05:38,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:05:38,459 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:05:38,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:05:38,460 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:05:38,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:05:38,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:05:38,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:05:38,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:05:38,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:05:38,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:05:38,462 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:05:38,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:05:38,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:05:38,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:05:38,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:05:38,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:05:38,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:05:38,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:05:38,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:05:38,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:05:38,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:05:38,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:05:38,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:05:38,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:05:38,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:05:38,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:05:38,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:05:38,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:05:38,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:05:38,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:05:38,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:05:38,769 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:05:38,769 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:05:38,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c78a721d7/82ecd003406e4a168d4cfaa4de2befaf/FLAG9652a97b6 [2020-10-13 14:05:39,481 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:05:39,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:05:39,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c78a721d7/82ecd003406e4a168d4cfaa4de2befaf/FLAG9652a97b6 [2020-10-13 14:05:39,680 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c78a721d7/82ecd003406e4a168d4cfaa4de2befaf [2020-10-13 14:05:39,689 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:05:39,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:05:39,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:05:39,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:05:39,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:05:39,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:05:39" (1/1) ... [2020-10-13 14:05:39,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c49d532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:39, skipping insertion in model container [2020-10-13 14:05:39,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:05:39" (1/1) ... [2020-10-13 14:05:39,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:05:39,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:05:41,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:05:41,322 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:05:42,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:05:42,343 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:05:42,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:42 WrapperNode [2020-10-13 14:05:42,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:05:42,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:05:42,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:05:42,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:05:42,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:42" (1/1) ... [2020-10-13 14:05:42,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:42" (1/1) ... [2020-10-13 14:05:42,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:42" (1/1) ... [2020-10-13 14:05:42,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:42" (1/1) ... [2020-10-13 14:05:42,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:42" (1/1) ... [2020-10-13 14:05:42,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:42" (1/1) ... [2020-10-13 14:05:42,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:42" (1/1) ... [2020-10-13 14:05:42,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:05:42,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:05:42,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:05:42,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:05:42,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:05:42,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:05:42,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:05:42,638 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:05:42,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:05:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:05:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:05:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:05:42,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:05:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:05:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:05:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:05:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:05:42,641 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:05:42,642 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:05:42,642 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:05:42,643 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:05:42,643 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:05:42,643 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:05:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:05:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:05:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:05:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:05:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:05:46,559 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:05:46,560 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:05:46,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:05:46 BoogieIcfgContainer [2020-10-13 14:05:46,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:05:46,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:05:46,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:05:46,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:05:46,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:05:39" (1/3) ... [2020-10-13 14:05:46,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d65fb56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:05:46, skipping insertion in model container [2020-10-13 14:05:46,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:05:42" (2/3) ... [2020-10-13 14:05:46,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d65fb56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:05:46, skipping insertion in model container [2020-10-13 14:05:46,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:05:46" (3/3) ... [2020-10-13 14:05:46,587 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:05:46,597 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:05:46,611 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:05:46,627 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:05:46,663 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:05:46,663 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:05:46,663 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:05:46,664 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:05:46,664 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:05:46,664 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:05:46,664 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:05:46,664 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:05:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-10-13 14:05:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-10-13 14:05:46,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:05:46,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:05:46,747 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:05:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:05:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-10-13 14:05:46,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:05:46,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793922122] [2020-10-13 14:05:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:05:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:05:48,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:05:49,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:05:50,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:05:51,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:05:52,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:05:52,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:05:53,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:05:53,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 482 [2020-10-13 14:05:53,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:05:53,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5152 [2020-10-13 14:05:53,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:05:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:05:53,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:05:53,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 185 [2020-10-13 14:05:53,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:05:54,639 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-13 14:05:54,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:05:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:05:54,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:05:54,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:05:54,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:05:54,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:05:54,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 14:05:54,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:05:54,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:05:54,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:05:54,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:05:54,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:05:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:05:55,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793922122] [2020-10-13 14:05:55,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:05:55,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:05:55,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848590951] [2020-10-13 14:05:55,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:05:55,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:05:55,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:05:55,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:05:55,338 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 5 states. [2020-10-13 14:06:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:12,395 INFO L93 Difference]: Finished difference Result 3903 states and 7031 transitions. [2020-10-13 14:06:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:06:12,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-10-13 14:06:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:12,441 INFO L225 Difference]: With dead ends: 3903 [2020-10-13 14:06:12,441 INFO L226 Difference]: Without dead ends: 2636 [2020-10-13 14:06:12,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:06:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2020-10-13 14:06:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2634. [2020-10-13 14:06:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2634 states. [2020-10-13 14:06:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 4318 transitions. [2020-10-13 14:06:12,721 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 4318 transitions. Word has length 476 [2020-10-13 14:06:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:12,726 INFO L479 AbstractCegarLoop]: Abstraction has 2634 states and 4318 transitions. [2020-10-13 14:06:12,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:06:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 4318 transitions. [2020-10-13 14:06:12,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-10-13 14:06:12,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:12,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:06:12,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:06:12,746 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:12,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:12,746 INFO L82 PathProgramCache]: Analyzing trace with hash 47179568, now seen corresponding path program 1 times [2020-10-13 14:06:12,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:12,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102766999] [2020-10-13 14:06:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:13,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:13,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:14,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:14,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:15,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:15,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:15,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:15,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:16,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:17,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:17,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:18,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:18,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 484 [2020-10-13 14:06:18,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:06:18,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5176 [2020-10-13 14:06:18,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:18,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:06:18,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:06:18,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-13 14:06:18,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 14:06:19,422 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-13 14:06:19,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:19,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:19,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:19,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:19,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:19,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:06:19,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:19,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:19,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102766999] [2020-10-13 14:06:19,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:19,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:06:19,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255134946] [2020-10-13 14:06:19,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:06:19,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:19,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:06:19,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:06:19,943 INFO L87 Difference]: Start difference. First operand 2634 states and 4318 transitions. Second operand 5 states. [2020-10-13 14:06:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:36,305 INFO L93 Difference]: Finished difference Result 7764 states and 12717 transitions. [2020-10-13 14:06:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:06:36,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 478 [2020-10-13 14:06:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:36,335 INFO L225 Difference]: With dead ends: 7764 [2020-10-13 14:06:36,335 INFO L226 Difference]: Without dead ends: 5212 [2020-10-13 14:06:36,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:06:36,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5212 states. [2020-10-13 14:06:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5212 to 5210. [2020-10-13 14:06:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5210 states. [2020-10-13 14:06:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 8512 transitions. [2020-10-13 14:06:36,668 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 8512 transitions. Word has length 478 [2020-10-13 14:06:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:36,670 INFO L479 AbstractCegarLoop]: Abstraction has 5210 states and 8512 transitions. [2020-10-13 14:06:36,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:06:36,671 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 8512 transitions. [2020-10-13 14:06:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-10-13 14:06:36,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:36,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:06:36,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:06:36,690 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:36,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1673347160, now seen corresponding path program 1 times [2020-10-13 14:06:36,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:36,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518368007] [2020-10-13 14:06:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:37,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:37,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:37,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:38,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:38,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:38,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:39,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:39,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:40,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:41,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:41,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 488 [2020-10-13 14:06:41,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:06:41,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 14:06:41,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:41,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:06:41,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:06:41,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-10-13 14:06:41,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:06:43,132 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-13 14:06:43,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:43,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:43,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:43,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:43,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:43,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 14:06:43,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:43,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:43,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:43,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:43,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518368007] [2020-10-13 14:06:43,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:43,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:06:43,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179195443] [2020-10-13 14:06:43,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:06:43,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:43,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:06:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:06:43,716 INFO L87 Difference]: Start difference. First operand 5210 states and 8512 transitions. Second operand 5 states. [2020-10-13 14:06:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:58,884 INFO L93 Difference]: Finished difference Result 15346 states and 25038 transitions. [2020-10-13 14:06:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:06:58,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 482 [2020-10-13 14:06:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:58,931 INFO L225 Difference]: With dead ends: 15346 [2020-10-13 14:06:58,931 INFO L226 Difference]: Without dead ends: 10316 [2020-10-13 14:06:58,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:06:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10316 states. [2020-10-13 14:06:59,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10316 to 10314. [2020-10-13 14:06:59,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10314 states. [2020-10-13 14:06:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 16786 transitions. [2020-10-13 14:06:59,632 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 16786 transitions. Word has length 482 [2020-10-13 14:06:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:59,634 INFO L479 AbstractCegarLoop]: Abstraction has 10314 states and 16786 transitions. [2020-10-13 14:06:59,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:06:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 16786 transitions. [2020-10-13 14:06:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-10-13 14:06:59,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:59,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:06:59,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:06:59,672 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash 306672422, now seen corresponding path program 1 times [2020-10-13 14:06:59,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:59,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354006393] [2020-10-13 14:06:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:59,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:59,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:00,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:00,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:01,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:03,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:03,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:03,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:03,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:04,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:04,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:04,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:04,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:04,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 491 [2020-10-13 14:07:04,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:07:04,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5144 [2020-10-13 14:07:04,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:04,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:07:04,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:07:04,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 14:07:04,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:05,846 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-13 14:07:05,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:05,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:05,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:05,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:05,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:05,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:07:05,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:05,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:05,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:05,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:05,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:06,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354006393] [2020-10-13 14:07:06,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:06,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:07:06,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979529531] [2020-10-13 14:07:06,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:07:06,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:06,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:07:06,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:07:06,071 INFO L87 Difference]: Start difference. First operand 10314 states and 16786 transitions. Second operand 4 states. [2020-10-13 14:07:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:24,261 INFO L93 Difference]: Finished difference Result 30806 states and 50104 transitions. [2020-10-13 14:07:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:07:24,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-10-13 14:07:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:24,323 INFO L225 Difference]: With dead ends: 30806 [2020-10-13 14:07:24,323 INFO L226 Difference]: Without dead ends: 20552 [2020-10-13 14:07:24,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:07:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20552 states. [2020-10-13 14:07:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20552 to 10414. [2020-10-13 14:07:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10414 states. [2020-10-13 14:07:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10414 states to 10414 states and 16942 transitions. [2020-10-13 14:07:25,039 INFO L78 Accepts]: Start accepts. Automaton has 10414 states and 16942 transitions. Word has length 485 [2020-10-13 14:07:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:25,040 INFO L479 AbstractCegarLoop]: Abstraction has 10414 states and 16942 transitions. [2020-10-13 14:07:25,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:07:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 10414 states and 16942 transitions. [2020-10-13 14:07:25,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-13 14:07:25,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:25,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:07:25,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:07:25,066 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:25,066 INFO L82 PathProgramCache]: Analyzing trace with hash 631090400, now seen corresponding path program 1 times [2020-10-13 14:07:25,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:25,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423167585] [2020-10-13 14:07:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:25,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:25,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:25,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:26,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:26,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:26,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:27,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:27,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:27,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:27,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:28,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:29,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:29,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:29,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:29,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:29,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:30,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 494 [2020-10-13 14:07:30,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 14:07:30,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 14:07:30,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:30,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:07:30,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:07:30,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-10-13 14:07:30,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:31,200 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-13 14:07:31,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:31,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:31,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:31,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:31,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:31,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:07:31,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:31,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:31,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423167585] [2020-10-13 14:07:31,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:31,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:07:31,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609507403] [2020-10-13 14:07:31,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:07:31,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:31,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:07:31,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:07:31,471 INFO L87 Difference]: Start difference. First operand 10414 states and 16942 transitions. Second operand 5 states. [2020-10-13 14:07:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:46,457 INFO L93 Difference]: Finished difference Result 30718 states and 49935 transitions. [2020-10-13 14:07:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:07:46,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2020-10-13 14:07:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:46,504 INFO L225 Difference]: With dead ends: 30718 [2020-10-13 14:07:46,505 INFO L226 Difference]: Without dead ends: 20480 [2020-10-13 14:07:46,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:07:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20480 states. [2020-10-13 14:07:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20480 to 20478. [2020-10-13 14:07:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20478 states. [2020-10-13 14:07:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20478 states to 20478 states and 33145 transitions. [2020-10-13 14:07:47,975 INFO L78 Accepts]: Start accepts. Automaton has 20478 states and 33145 transitions. Word has length 488 [2020-10-13 14:07:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:47,976 INFO L479 AbstractCegarLoop]: Abstraction has 20478 states and 33145 transitions. [2020-10-13 14:07:47,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:07:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 20478 states and 33145 transitions. [2020-10-13 14:07:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-13 14:07:48,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:48,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:07:48,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:07:48,016 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:48,017 INFO L82 PathProgramCache]: Analyzing trace with hash 668077337, now seen corresponding path program 1 times [2020-10-13 14:07:48,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:48,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957407655] [2020-10-13 14:07:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:48,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:50,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:50,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:53,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:53,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 494 [2020-10-13 14:07:53,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:07:53,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 14:07:53,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:53,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:07:53,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 14:07:53,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 14:07:53,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:54,102 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-13 14:07:54,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:54,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:54,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:54,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:54,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:54,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 14:07:54,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:54,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:54,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957407655] [2020-10-13 14:07:54,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:54,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:07:54,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776752030] [2020-10-13 14:07:54,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:07:54,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:54,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:07:54,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:07:54,351 INFO L87 Difference]: Start difference. First operand 20478 states and 33145 transitions. Second operand 5 states. [2020-10-13 14:08:11,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:11,704 INFO L93 Difference]: Finished difference Result 57025 states and 91688 transitions. [2020-10-13 14:08:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:08:11,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2020-10-13 14:08:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:11,772 INFO L225 Difference]: With dead ends: 57025 [2020-10-13 14:08:11,772 INFO L226 Difference]: Without dead ends: 39071 [2020-10-13 14:08:11,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:08:11,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39071 states. [2020-10-13 14:08:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39071 to 22484. [2020-10-13 14:08:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22484 states. [2020-10-13 14:08:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22484 states to 22484 states and 36745 transitions. [2020-10-13 14:08:13,144 INFO L78 Accepts]: Start accepts. Automaton has 22484 states and 36745 transitions. Word has length 488 [2020-10-13 14:08:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:13,144 INFO L479 AbstractCegarLoop]: Abstraction has 22484 states and 36745 transitions. [2020-10-13 14:08:13,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:08:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 22484 states and 36745 transitions. [2020-10-13 14:08:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-10-13 14:08:13,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:13,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:08:13,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:08:13,181 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:13,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1902475178, now seen corresponding path program 1 times [2020-10-13 14:08:13,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:13,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313299729] [2020-10-13 14:08:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:13,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:13,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:13,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:14,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:14,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:14,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:15,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:18,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:18,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 496 [2020-10-13 14:08:18,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:08:18,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-13 14:08:18,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:18,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:08:18,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:08:18,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:08:18,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:19,208 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-13 14:08:19,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:19,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:19,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:19,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:19,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:19,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 14:08:19,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:19,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:19,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313299729] [2020-10-13 14:08:19,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:19,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:08:19,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137001481] [2020-10-13 14:08:19,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:08:19,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:19,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:08:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:08:19,408 INFO L87 Difference]: Start difference. First operand 22484 states and 36745 transitions. Second operand 5 states. [2020-10-13 14:08:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:44,020 INFO L93 Difference]: Finished difference Result 78430 states and 126512 transitions. [2020-10-13 14:08:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:08:44,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 490 [2020-10-13 14:08:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:44,096 INFO L225 Difference]: With dead ends: 78430 [2020-10-13 14:08:44,096 INFO L226 Difference]: Without dead ends: 60177 [2020-10-13 14:08:44,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:08:44,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60177 states. [2020-10-13 14:08:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60177 to 26599. [2020-10-13 14:08:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26599 states. [2020-10-13 14:08:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26599 states to 26599 states and 44068 transitions. [2020-10-13 14:08:45,843 INFO L78 Accepts]: Start accepts. Automaton has 26599 states and 44068 transitions. Word has length 490 [2020-10-13 14:08:45,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:45,844 INFO L479 AbstractCegarLoop]: Abstraction has 26599 states and 44068 transitions. [2020-10-13 14:08:45,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:08:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand 26599 states and 44068 transitions. [2020-10-13 14:08:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-10-13 14:08:45,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:45,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:08:45,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:08:45,867 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:45,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:45,867 INFO L82 PathProgramCache]: Analyzing trace with hash 63229299, now seen corresponding path program 1 times [2020-10-13 14:08:45,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:45,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268373465] [2020-10-13 14:08:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:46,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:46,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:47,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:48,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:48,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:48,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:49,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:49,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:49,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:49,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:49,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:49,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:50,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:50,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:50,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:50,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:50,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:51,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:51,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:51,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 498 [2020-10-13 14:08:51,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 14:08:51,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-13 14:08:51,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:51,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:08:51,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:08:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:08:51,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:51,965 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-13 14:08:51,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:51,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:51,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:51,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:51,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:51,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:08:51,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:51,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:51,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:51,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:52,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268373465] [2020-10-13 14:08:52,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:52,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:08:52,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615405736] [2020-10-13 14:08:52,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:08:52,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:52,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:08:52,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:08:52,148 INFO L87 Difference]: Start difference. First operand 26599 states and 44068 transitions. Second operand 5 states. [2020-10-13 14:09:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:14,293 INFO L93 Difference]: Finished difference Result 70338 states and 115254 transitions. [2020-10-13 14:09:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:09:14,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 492 [2020-10-13 14:09:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:14,372 INFO L225 Difference]: With dead ends: 70338 [2020-10-13 14:09:14,372 INFO L226 Difference]: Without dead ends: 51546 [2020-10-13 14:09:14,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:09:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51546 states. [2020-10-13 14:09:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51546 to 35004. [2020-10-13 14:09:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35004 states. [2020-10-13 14:09:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35004 states to 35004 states and 58969 transitions. [2020-10-13 14:09:16,879 INFO L78 Accepts]: Start accepts. Automaton has 35004 states and 58969 transitions. Word has length 492 [2020-10-13 14:09:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:16,879 INFO L479 AbstractCegarLoop]: Abstraction has 35004 states and 58969 transitions. [2020-10-13 14:09:16,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:09:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 35004 states and 58969 transitions. [2020-10-13 14:09:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-13 14:09:16,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:16,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:09:16,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:09:16,919 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:16,920 INFO L82 PathProgramCache]: Analyzing trace with hash 231062676, now seen corresponding path program 1 times [2020-10-13 14:09:16,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:16,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289368574] [2020-10-13 14:09:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:17,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:17,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:17,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:17,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:17,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:17,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:18,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:18,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:18,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:19,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:19,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:19,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:20,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:20,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:20,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:20,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:20,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking...