/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:40:53,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:40:53,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:40:53,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:40:53,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:40:53,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:40:53,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:40:53,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:40:53,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:40:53,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:40:53,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:40:53,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:40:53,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:40:53,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:40:53,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:40:53,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:40:53,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:40:53,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:40:53,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:40:53,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:40:53,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:40:53,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:40:53,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:40:53,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:40:53,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:40:53,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:40:53,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:40:53,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:40:53,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:40:53,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:40:53,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:40:53,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:40:53,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:40:53,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:40:53,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:40:53,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:40:53,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:40:53,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:40:53,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:40:53,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:40:53,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:40:53,442 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 [2020-10-14 09:40:53,481 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:40:53,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:40:53,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:40:53,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:40:53,484 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:40:53,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:40:53,485 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:40:53,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:40:53,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:40:53,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:40:53,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:40:53,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:40:53,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:40:53,487 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:40:53,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:40:53,488 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:40:53,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:40:53,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:40:53,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:40:53,488 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:40:53,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:40:53,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:40:53,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:40:53,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:40:53,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:40:53,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:40:53,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:40:53,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:40:53,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:40:53,490 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:40:53,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:40:53,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:40:53,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:40:53,812 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:40:53,812 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:40:53,813 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-14 09:40:53,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/685788c18/9eadcefeca2447bf91243ac3a1ae2805/FLAGf3b7580d8 [2020-10-14 09:40:54,631 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:40:54,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-14 09:40:54,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/685788c18/9eadcefeca2447bf91243ac3a1ae2805/FLAGf3b7580d8 [2020-10-14 09:40:54,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/685788c18/9eadcefeca2447bf91243ac3a1ae2805 [2020-10-14 09:40:54,710 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:40:54,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:40:54,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:40:54,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:40:54,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:40:54,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:54" (1/1) ... [2020-10-14 09:40:54,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@412428f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:54, skipping insertion in model container [2020-10-14 09:40:54,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:54" (1/1) ... [2020-10-14 09:40:54,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:40:54,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:40:56,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:40:56,098 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:40:57,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:40:57,255 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:40:57,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:57 WrapperNode [2020-10-14 09:40:57,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:40:57,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:40:57,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:40:57,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:40:57,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:57" (1/1) ... [2020-10-14 09:40:57,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:57" (1/1) ... [2020-10-14 09:40:57,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:57" (1/1) ... [2020-10-14 09:40:57,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:57" (1/1) ... [2020-10-14 09:40:57,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:57" (1/1) ... [2020-10-14 09:40:57,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:57" (1/1) ... [2020-10-14 09:40:57,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:57" (1/1) ... [2020-10-14 09:40:57,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:40:57,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:40:57,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:40:57,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:40:57,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:57" (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 [2020-10-14 09:40:57,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:40:57,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:40:57,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:40:57,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:40:57,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:40:57,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:40:57,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:40:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:40:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:40:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:40:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:40:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:40:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:40:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:40:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:40:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:40:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 09:40:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:40:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:40:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:40:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:40:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:41:01,231 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:41:01,232 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:41:01,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:01 BoogieIcfgContainer [2020-10-14 09:41:01,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:41:01,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:41:01,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:41:01,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:41:01,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:40:54" (1/3) ... [2020-10-14 09:41:01,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc6d39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:01, skipping insertion in model container [2020-10-14 09:41:01,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:57" (2/3) ... [2020-10-14 09:41:01,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc6d39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:01, skipping insertion in model container [2020-10-14 09:41:01,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:01" (3/3) ... [2020-10-14 09:41:01,252 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-14 09:41:01,262 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:41:01,271 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:41:01,284 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:41:01,313 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:41:01,313 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:41:01,313 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:41:01,313 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:41:01,313 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:41:01,313 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:41:01,314 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:41:01,314 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:41:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states. [2020-10-14 09:41:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 09:41:01,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:41:01,407 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] [2020-10-14 09:41:01,407 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:41:01,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:41:01,414 INFO L82 PathProgramCache]: Analyzing trace with hash -313895885, now seen corresponding path program 1 times [2020-10-14 09:41:01,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:41:01,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729561985] [2020-10-14 09:41:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:41:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:02,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:03,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:03,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:04,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:04,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:04,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:05,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:06,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:07,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:07,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-14 09:41:07,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:41:07,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 09:41:07,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:07,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:07,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:41:07,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 213 [2020-10-14 09:41:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:41:07,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:41:08,486 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:41:08,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:41:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:08,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:08,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:08,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:41:08,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:41:08,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-14 09:41:08,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:08,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:41:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:41:08,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:41:08,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:41:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:41:08,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729561985] [2020-10-14 09:41:08,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:41:08,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:41:08,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062720284] [2020-10-14 09:41:08,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:41:08,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:41:08,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:41:08,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:41:08,917 INFO L87 Difference]: Start difference. First operand 1549 states. Second operand 4 states. [2020-10-14 09:41:09,764 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 402 [2020-10-14 09:41:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:41:26,104 INFO L93 Difference]: Finished difference Result 3153 states and 5496 transitions. [2020-10-14 09:41:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:41:26,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-14 09:41:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:41:26,143 INFO L225 Difference]: With dead ends: 3153 [2020-10-14 09:41:26,143 INFO L226 Difference]: Without dead ends: 2418 [2020-10-14 09:41:26,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:41:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2020-10-14 09:41:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 2312. [2020-10-14 09:41:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-10-14 09:41:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3854 transitions. [2020-10-14 09:41:26,325 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3854 transitions. Word has length 391 [2020-10-14 09:41:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:41:26,327 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 3854 transitions. [2020-10-14 09:41:26,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:41:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3854 transitions. [2020-10-14 09:41:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 09:41:26,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:41:26,340 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] [2020-10-14 09:41:26,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:41:26,341 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:41:26,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:41:26,341 INFO L82 PathProgramCache]: Analyzing trace with hash 405378882, now seen corresponding path program 1 times [2020-10-14 09:41:26,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:41:26,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055673997] [2020-10-14 09:41:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:41:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:26,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:27,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:27,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:27,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:28,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:28,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:28,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:30,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:30,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:31,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:31,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:31,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-14 09:41:31,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:41:31,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-14 09:41:31,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:31,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:31,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:41:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-14 09:41:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 09:41:31,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:41:32,921 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:41:32,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:41:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:32,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:32,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:32,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:41:32,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:41:32,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-14 09:41:32,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:32,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:32,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:41:32,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:41:32,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:41:32,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:41:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:41:33,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055673997] [2020-10-14 09:41:33,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:41:33,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:41:33,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895115943] [2020-10-14 09:41:33,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:41:33,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:41:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:41:33,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:41:33,235 INFO L87 Difference]: Start difference. First operand 2312 states and 3854 transitions. Second operand 4 states. [2020-10-14 09:41:34,056 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-14 09:41:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:41:47,151 INFO L93 Difference]: Finished difference Result 4704 states and 7763 transitions. [2020-10-14 09:41:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:41:47,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-14 09:41:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:41:47,170 INFO L225 Difference]: With dead ends: 4704 [2020-10-14 09:41:47,170 INFO L226 Difference]: Without dead ends: 3228 [2020-10-14 09:41:47,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:41:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2020-10-14 09:41:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 3226. [2020-10-14 09:41:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3226 states. [2020-10-14 09:41:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 5342 transitions. [2020-10-14 09:41:47,307 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 5342 transitions. Word has length 391 [2020-10-14 09:41:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:41:47,308 INFO L479 AbstractCegarLoop]: Abstraction has 3226 states and 5342 transitions. [2020-10-14 09:41:47,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:41:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 5342 transitions. [2020-10-14 09:41:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 09:41:47,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:41:47,320 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] [2020-10-14 09:41:47,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:41:47,321 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:41:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:41:47,321 INFO L82 PathProgramCache]: Analyzing trace with hash -321117801, now seen corresponding path program 1 times [2020-10-14 09:41:47,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:41:47,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387175384] [2020-10-14 09:41:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:41:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:47,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:48,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:48,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:48,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:49,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:49,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:50,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:50,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:50,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:51,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:51,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:52,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:52,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-14 09:41:52,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:41:52,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-14 09:41:52,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:52,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:52,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:41:52,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 221 [2020-10-14 09:41:52,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:41:52,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:41:53,448 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:41:53,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:41:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:53,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:53,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:41:53,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:41:53,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 09:41:53,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:53,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:53,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:41:53,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:41:53,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:41:53,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:41:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:41:53,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387175384] [2020-10-14 09:41:53,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:41:53,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:41:53,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098766983] [2020-10-14 09:41:53,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:41:53,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:41:53,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:41:53,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:41:53,670 INFO L87 Difference]: Start difference. First operand 3226 states and 5342 transitions. Second operand 4 states. [2020-10-14 09:42:06,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:42:06,256 INFO L93 Difference]: Finished difference Result 7606 states and 12511 transitions. [2020-10-14 09:42:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:42:06,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-14 09:42:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:42:06,283 INFO L225 Difference]: With dead ends: 7606 [2020-10-14 09:42:06,283 INFO L226 Difference]: Without dead ends: 5384 [2020-10-14 09:42:06,289 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 [2020-10-14 09:42:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2020-10-14 09:42:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 5226. [2020-10-14 09:42:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5226 states. [2020-10-14 09:42:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 8569 transitions. [2020-10-14 09:42:06,484 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 8569 transitions. Word has length 391 [2020-10-14 09:42:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:42:06,484 INFO L479 AbstractCegarLoop]: Abstraction has 5226 states and 8569 transitions. [2020-10-14 09:42:06,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:42:06,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 8569 transitions. [2020-10-14 09:42:06,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 09:42:06,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:42:06,501 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] [2020-10-14 09:42:06,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:42:06,505 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:42:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:42:06,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1843727041, now seen corresponding path program 1 times [2020-10-14 09:42:06,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:42:06,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990698552] [2020-10-14 09:42:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:42:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:06,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:07,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:07,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:07,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:07,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:08,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:08,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:08,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:09,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:10,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:10,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:10,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:11,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:11,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-14 09:42:11,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:42:11,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-14 09:42:11,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:11,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:11,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:42:11,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-14 09:42:11,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:42:11,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:42:12,556 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:42:12,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:42:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:12,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:12,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:12,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:42:12,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:42:12,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 09:42:12,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:12,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:42:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:42:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:42:12,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:42:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:42:12,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990698552] [2020-10-14 09:42:12,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:42:12,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:42:12,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531172740] [2020-10-14 09:42:12,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:42:12,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:42:12,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:42:12,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:42:12,766 INFO L87 Difference]: Start difference. First operand 5226 states and 8569 transitions. Second operand 4 states. [2020-10-14 09:42:13,540 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-14 09:42:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:42:26,526 INFO L93 Difference]: Finished difference Result 12438 states and 20247 transitions. [2020-10-14 09:42:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:42:26,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-14 09:42:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:42:26,560 INFO L225 Difference]: With dead ends: 12438 [2020-10-14 09:42:26,560 INFO L226 Difference]: Without dead ends: 8028 [2020-10-14 09:42:26,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:42:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2020-10-14 09:42:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 8026. [2020-10-14 09:42:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8026 states. [2020-10-14 09:42:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 13053 transitions. [2020-10-14 09:42:26,873 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 13053 transitions. Word has length 391 [2020-10-14 09:42:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:42:26,873 INFO L479 AbstractCegarLoop]: Abstraction has 8026 states and 13053 transitions. [2020-10-14 09:42:26,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:42:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 13053 transitions. [2020-10-14 09:42:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 09:42:26,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:42:26,894 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] [2020-10-14 09:42:26,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:42:26,895 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:42:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:42:26,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1676608371, now seen corresponding path program 1 times [2020-10-14 09:42:26,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:42:26,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712408898] [2020-10-14 09:42:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:42:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:27,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:27,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:27,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:28,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:28,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:28,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:28,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:29,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:29,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:29,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:29,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:32,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:32,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-14 09:42:32,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:42:32,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-14 09:42:32,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:32,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:42:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 229 [2020-10-14 09:42:32,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:42:32,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:42:32,891 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:42:32,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:42:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:32,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:32,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:32,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:42:32,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:42:32,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 09:42:32,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:32,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:32,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:42:32,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:42:32,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:42:32,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:42:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:42:33,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712408898] [2020-10-14 09:42:33,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:42:33,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:42:33,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781148584] [2020-10-14 09:42:33,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:42:33,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:42:33,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:42:33,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:42:33,038 INFO L87 Difference]: Start difference. First operand 8026 states and 13053 transitions. Second operand 4 states. [2020-10-14 09:42:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:42:43,065 INFO L93 Difference]: Finished difference Result 11558 states and 18923 transitions. [2020-10-14 09:42:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:42:43,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-14 09:42:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:42:43,091 INFO L225 Difference]: With dead ends: 11558 [2020-10-14 09:42:43,091 INFO L226 Difference]: Without dead ends: 5780 [2020-10-14 09:42:43,104 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 [2020-10-14 09:42:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2020-10-14 09:42:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 5778. [2020-10-14 09:42:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5778 states. [2020-10-14 09:42:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5778 states to 5778 states and 9481 transitions. [2020-10-14 09:42:43,296 INFO L78 Accepts]: Start accepts. Automaton has 5778 states and 9481 transitions. Word has length 391 [2020-10-14 09:42:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:42:43,297 INFO L479 AbstractCegarLoop]: Abstraction has 5778 states and 9481 transitions. [2020-10-14 09:42:43,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:42:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 5778 states and 9481 transitions. [2020-10-14 09:42:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 09:42:43,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:42:43,308 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] [2020-10-14 09:42:43,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:42:43,309 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:42:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:42:43,309 INFO L82 PathProgramCache]: Analyzing trace with hash 703762330, now seen corresponding path program 1 times [2020-10-14 09:42:43,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:42:43,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780012193] [2020-10-14 09:42:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:42:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:43,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:43,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:43,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:44,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:44,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:44,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:44,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:44,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:45,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:45,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:45,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:45,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:48,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:48,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-14 09:42:48,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:42:48,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-14 09:42:48,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:48,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:48,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:42:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 267 [2020-10-14 09:42:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:42:48,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:42:49,313 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:42:49,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:42:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:49,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:49,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:49,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:42:49,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:42:49,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 09:42:49,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:49,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:49,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:42:49,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:42:49,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:42:49,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:42:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:42:49,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780012193] [2020-10-14 09:42:49,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:42:49,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:42:49,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883232017] [2020-10-14 09:42:49,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:42:49,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:42:49,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:42:49,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:42:49,501 INFO L87 Difference]: Start difference. First operand 5778 states and 9481 transitions. Second operand 4 states. [2020-10-14 09:42:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:42:59,944 INFO L93 Difference]: Finished difference Result 10038 states and 16486 transitions. [2020-10-14 09:42:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:42:59,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-14 09:42:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:42:59,961 INFO L225 Difference]: With dead ends: 10038 [2020-10-14 09:42:59,961 INFO L226 Difference]: Without dead ends: 5780 [2020-10-14 09:42:59,970 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 [2020-10-14 09:42:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2020-10-14 09:43:00,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 5778. [2020-10-14 09:43:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5778 states. [2020-10-14 09:43:00,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5778 states to 5778 states and 9463 transitions. [2020-10-14 09:43:00,154 INFO L78 Accepts]: Start accepts. Automaton has 5778 states and 9463 transitions. Word has length 391 [2020-10-14 09:43:00,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:43:00,155 INFO L479 AbstractCegarLoop]: Abstraction has 5778 states and 9463 transitions. [2020-10-14 09:43:00,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:43:00,155 INFO L276 IsEmpty]: Start isEmpty. Operand 5778 states and 9463 transitions. [2020-10-14 09:43:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 09:43:00,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:43:00,164 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] [2020-10-14 09:43:00,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:43:00,164 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:43:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:43:00,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2092984850, now seen corresponding path program 1 times [2020-10-14 09:43:00,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:43:00,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857400867] [2020-10-14 09:43:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:43:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:00,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:00,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:00,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:01,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:01,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:01,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:01,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:01,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:02,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:02,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:05,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:05,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-14 09:43:05,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:43:05,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 09:43:05,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:05,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:05,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:43:05,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-14 09:43:05,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:43:05,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:06,173 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:43:06,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:43:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:06,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:06,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:06,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:43:06,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:43:06,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:43:06,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:06,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:43:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:43:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:43:06,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:43:06,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857400867] [2020-10-14 09:43:06,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:43:06,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:43:06,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412735831] [2020-10-14 09:43:06,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:43:06,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:43:06,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:43:06,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:43:06,284 INFO L87 Difference]: Start difference. First operand 5778 states and 9463 transitions. Second operand 4 states. [2020-10-14 09:43:07,067 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-14 09:43:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:43:15,624 INFO L93 Difference]: Finished difference Result 5782 states and 9465 transitions. [2020-10-14 09:43:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:43:15,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-14 09:43:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:43:15,632 INFO L225 Difference]: With dead ends: 5782 [2020-10-14 09:43:15,633 INFO L226 Difference]: Without dead ends: 3184 [2020-10-14 09:43:15,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:43:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2020-10-14 09:43:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 3182. [2020-10-14 09:43:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3182 states. [2020-10-14 09:43:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 5246 transitions. [2020-10-14 09:43:15,733 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 5246 transitions. Word has length 391 [2020-10-14 09:43:15,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:43:15,734 INFO L479 AbstractCegarLoop]: Abstraction has 3182 states and 5246 transitions. [2020-10-14 09:43:15,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:43:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 5246 transitions. [2020-10-14 09:43:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 09:43:15,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:43:15,739 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] [2020-10-14 09:43:15,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:43:15,740 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:43:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:43:15,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2094974133, now seen corresponding path program 1 times [2020-10-14 09:43:15,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:43:15,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937234275] [2020-10-14 09:43:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:43:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:15,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:16,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:16,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:16,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:16,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:16,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:17,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:17,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:17,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:17,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:20,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:20,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-14 09:43:20,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 09:43:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 09:43:20,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:20,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:43:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-14 09:43:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 09:43:20,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:21,664 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:43:21,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:43:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:21,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:21,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:21,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:43:21,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:43:21,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:43:21,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:21,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:43:21,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:43:21,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:43:21,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:43:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:43:21,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937234275] [2020-10-14 09:43:21,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:43:21,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:43:21,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132155713] [2020-10-14 09:43:21,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:43:21,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:43:21,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:43:21,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:43:21,773 INFO L87 Difference]: Start difference. First operand 3182 states and 5246 transitions. Second operand 4 states. [2020-10-14 09:43:22,552 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-14 09:43:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:43:33,090 INFO L93 Difference]: Finished difference Result 7484 states and 12211 transitions. [2020-10-14 09:43:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:43:33,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-14 09:43:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:43:33,102 INFO L225 Difference]: With dead ends: 7484 [2020-10-14 09:43:33,102 INFO L226 Difference]: Without dead ends: 4882 [2020-10-14 09:43:33,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:43:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2020-10-14 09:43:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 4880. [2020-10-14 09:43:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4880 states. [2020-10-14 09:43:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4880 states to 4880 states and 7964 transitions. [2020-10-14 09:43:33,274 INFO L78 Accepts]: Start accepts. Automaton has 4880 states and 7964 transitions. Word has length 391 [2020-10-14 09:43:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:43:33,274 INFO L479 AbstractCegarLoop]: Abstraction has 4880 states and 7964 transitions. [2020-10-14 09:43:33,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:43:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4880 states and 7964 transitions. [2020-10-14 09:43:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 09:43:33,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:43:33,281 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] [2020-10-14 09:43:33,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:43:33,281 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:43:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:43:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash -364795258, now seen corresponding path program 1 times [2020-10-14 09:43:33,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:43:33,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238860118] [2020-10-14 09:43:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:43:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:33,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:33,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:34,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:34,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:34,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:34,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:34,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:35,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:35,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:38,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:38,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-14 09:43:38,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:43:38,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 09:43:38,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:38,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:43:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-14 09:43:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:43:38,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:39,207 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:43:39,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:43:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:39,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:39,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:39,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:43:39,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:43:39,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:43:39,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:39,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:39,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:43:39,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:43:39,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:43:39,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:43:39,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238860118] [2020-10-14 09:43:39,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:43:39,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:43:39,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587591641] [2020-10-14 09:43:39,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:43:39,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:43:39,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:43:39,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:43:39,334 INFO L87 Difference]: Start difference. First operand 4880 states and 7964 transitions. Second operand 4 states. [2020-10-14 09:43:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:43:47,758 INFO L93 Difference]: Finished difference Result 6668 states and 10892 transitions. [2020-10-14 09:43:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:43:47,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-14 09:43:47,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:43:47,763 INFO L225 Difference]: With dead ends: 6668 [2020-10-14 09:43:47,763 INFO L226 Difference]: Without dead ends: 2826 [2020-10-14 09:43:47,771 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 [2020-10-14 09:43:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2020-10-14 09:43:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2824. [2020-10-14 09:43:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-10-14 09:43:47,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 4621 transitions. [2020-10-14 09:43:47,862 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 4621 transitions. Word has length 391 [2020-10-14 09:43:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:43:47,862 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 4621 transitions. [2020-10-14 09:43:47,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:43:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 4621 transitions. [2020-10-14 09:43:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:43:47,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:43:47,866 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] [2020-10-14 09:43:47,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:43:47,866 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:43:47,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:43:47,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1569859532, now seen corresponding path program 1 times [2020-10-14 09:43:47,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:43:47,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437924757] [2020-10-14 09:43:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:43:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:48,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:48,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:48,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:48,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:49,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:49,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:49,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:49,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:49,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:49,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:49,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:53,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:53,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:43:53,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 09:43:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 09:43:53,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:53,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:43:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 340 [2020-10-14 09:43:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 09:43:53,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:53,920 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:43:53,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:43:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:53,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:53,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:53,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:43:53,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:43:53,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:43:53,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:53,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:53,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:43:53,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:43:53,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:43:53,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:43:54,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437924757] [2020-10-14 09:43:54,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:43:54,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:43:54,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864150973] [2020-10-14 09:43:54,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:43:54,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:43:54,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:43:54,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:43:54,109 INFO L87 Difference]: Start difference. First operand 2824 states and 4621 transitions. Second operand 4 states. [2020-10-14 09:43:54,864 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2020-10-14 09:44:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:44:04,601 INFO L93 Difference]: Finished difference Result 4238 states and 6987 transitions. [2020-10-14 09:44:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:44:04,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:44:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:44:04,608 INFO L225 Difference]: With dead ends: 4238 [2020-10-14 09:44:04,608 INFO L226 Difference]: Without dead ends: 3252 [2020-10-14 09:44:04,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:44:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2020-10-14 09:44:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 3248. [2020-10-14 09:44:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3248 states. [2020-10-14 09:44:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 5327 transitions. [2020-10-14 09:44:04,726 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 5327 transitions. Word has length 396 [2020-10-14 09:44:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:44:04,727 INFO L479 AbstractCegarLoop]: Abstraction has 3248 states and 5327 transitions. [2020-10-14 09:44:04,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:44:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 5327 transitions. [2020-10-14 09:44:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:44:04,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:44:04,733 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] [2020-10-14 09:44:04,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:44:04,734 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:44:04,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:44:04,734 INFO L82 PathProgramCache]: Analyzing trace with hash -95052815, now seen corresponding path program 1 times [2020-10-14 09:44:04,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:44:04,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663339660] [2020-10-14 09:44:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:44:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:44:05,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:05,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:05,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:05,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:05,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:06,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:06,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:06,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:06,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:06,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:06,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:06,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:09,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:44:09,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:44:09,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:44:09,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 09:44:09,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:44:09,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:44:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:44:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-14 09:44:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-14 09:44:09,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:44:10,794 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:44:10,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:44:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:44:10,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:10,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:44:10,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:44:10,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:44:10,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 09:44:10,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:44:10,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:44:10,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:44:10,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:44:10,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:44:10,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:44:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:44:10,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663339660] [2020-10-14 09:44:10,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:44:10,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:44:10,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813750846] [2020-10-14 09:44:10,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:44:10,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:44:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:44:10,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:44:10,983 INFO L87 Difference]: Start difference. First operand 3248 states and 5327 transitions. Second operand 4 states. [2020-10-14 09:44:11,743 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-10-14 09:44:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:44:20,056 INFO L93 Difference]: Finished difference Result 6116 states and 10071 transitions. [2020-10-14 09:44:20,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:44:20,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:44:20,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:44:20,063 INFO L225 Difference]: With dead ends: 6116 [2020-10-14 09:44:20,063 INFO L226 Difference]: Without dead ends: 4706 [2020-10-14 09:44:20,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:44:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2020-10-14 09:44:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 4704. [2020-10-14 09:44:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4704 states. [2020-10-14 09:44:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 7699 transitions. [2020-10-14 09:44:20,222 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 7699 transitions. Word has length 396 [2020-10-14 09:44:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:44:20,223 INFO L479 AbstractCegarLoop]: Abstraction has 4704 states and 7699 transitions. [2020-10-14 09:44:20,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:44:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 7699 transitions. [2020-10-14 09:44:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-14 09:44:20,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:44:20,229 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] [2020-10-14 09:44:20,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:44:20,229 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:44:20,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:44:20,230 INFO L82 PathProgramCache]: Analyzing trace with hash 666293428, now seen corresponding path program 1 times [2020-10-14 09:44:20,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:44:20,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731265457] [2020-10-14 09:44:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:44:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:44:20,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:20,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:20,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:21,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:21,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:21,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:21,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:21,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:21,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:22,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:22,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:25,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:44:25,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-14 09:44:25,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 09:44:25,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-14 09:44:25,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:44:25,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:44:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:44:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 237 [2020-10-14 09:44:25,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:44:25,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:44:26,460 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:44:26,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:44:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:44:26,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:26,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:44:26,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:44:26,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:44:26,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 09:44:26,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:44:26,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:44:26,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:44:26,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:44:26,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:44:26,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:44:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:44:26,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731265457] [2020-10-14 09:44:26,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:44:26,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:44:26,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553129978] [2020-10-14 09:44:26,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:44:26,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:44:26,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:44:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:44:26,733 INFO L87 Difference]: Start difference. First operand 4704 states and 7699 transitions. Second operand 4 states. [2020-10-14 09:44:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:44:35,179 INFO L93 Difference]: Finished difference Result 6260 states and 10263 transitions. [2020-10-14 09:44:35,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:44:35,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2020-10-14 09:44:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:44:35,185 INFO L225 Difference]: With dead ends: 6260 [2020-10-14 09:44:35,185 INFO L226 Difference]: Without dead ends: 2718 [2020-10-14 09:44:35,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:44:35,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2020-10-14 09:44:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 2406. [2020-10-14 09:44:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2406 states. [2020-10-14 09:44:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3950 transitions. [2020-10-14 09:44:35,252 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3950 transitions. Word has length 397 [2020-10-14 09:44:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:44:35,252 INFO L479 AbstractCegarLoop]: Abstraction has 2406 states and 3950 transitions. [2020-10-14 09:44:35,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:44:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3950 transitions. [2020-10-14 09:44:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-10-14 09:44:35,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:44:35,256 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] [2020-10-14 09:44:35,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:44:35,256 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:44:35,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:44:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1434231108, now seen corresponding path program 1 times [2020-10-14 09:44:35,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:44:35,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225497510] [2020-10-14 09:44:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:44:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:44:35,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:35,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:35,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:36,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:36,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:36,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:36,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:36,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:36,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:37,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:37,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:37,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:37,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:37,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:40,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:44:40,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 408 [2020-10-14 09:44:40,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 09:44:40,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 09:44:40,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:44:40,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:44:40,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:44:40,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 240 [2020-10-14 09:44:40,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-14 09:44:40,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:44:41,226 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:44:41,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:44:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:44:41,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:44:41,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:44:41,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:44:41,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:44:41,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:44:41,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:44:41,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:44:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:44:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:44:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:44:41,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:44:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:44:41,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225497510] [2020-10-14 09:44:41,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:44:41,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:44:41,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621763307] [2020-10-14 09:44:41,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:44:41,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:44:41,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:44:41,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:44:41,378 INFO L87 Difference]: Start difference. First operand 2406 states and 3950 transitions. Second operand 4 states. [2020-10-14 09:44:42,140 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 397