/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.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:40:10,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:40:10,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:40:10,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:40:10,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:40:10,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:40:10,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:40:10,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:40:10,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:40:10,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:40:10,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:40:10,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:40:10,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:40:10,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:40:10,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:40:10,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:40:10,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:40:10,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:40:10,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:40:10,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:40:10,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:40:10,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:40:10,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:40:10,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:40:10,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:40:10,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:40:10,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:40:10,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:40:10,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:40:10,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:40:10,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:40:10,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:40:10,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:40:10,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:40:10,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:40:10,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:40:10,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:40:10,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:40:10,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:40:10,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:40:10,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:40:10,608 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 09:40:10,633 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:40:10,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:40:10,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:40:10,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:40:10,635 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:40:10,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:40:10,635 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:40:10,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:40:10,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:40:10,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:40:10,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:40:10,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:40:10,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:40:10,637 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:40:10,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:40:10,637 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:40:10,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:40:10,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:40:10,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:40:10,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:40:10,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:40:10,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:40:10,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:40:10,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:40:10,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:40:10,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:40:10,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:40:10,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:40:10,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:40:10,640 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 09:40:10,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:40:10,967 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:40:10,971 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:40:10,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:40:10,973 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:40:10,973 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-14 09:40:11,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79503e43a/b51d32f484184f6db6c3e890c322ef29/FLAG38951e04d [2020-10-14 09:40:11,709 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:40:11,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-14 09:40:11,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79503e43a/b51d32f484184f6db6c3e890c322ef29/FLAG38951e04d [2020-10-14 09:40:11,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79503e43a/b51d32f484184f6db6c3e890c322ef29 [2020-10-14 09:40:11,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:40:11,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:40:11,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:40:11,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:40:11,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:40:11,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:11" (1/1) ... [2020-10-14 09:40:11,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c32aca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:11, skipping insertion in model container [2020-10-14 09:40:11,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:11" (1/1) ... [2020-10-14 09:40:11,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:40:12,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:40:13,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:40:13,415 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:40:14,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:40:14,129 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:40:14,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14 WrapperNode [2020-10-14 09:40:14,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:40:14,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:40:14,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:40:14,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:40:14,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2020-10-14 09:40:14,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2020-10-14 09:40:14,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2020-10-14 09:40:14,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2020-10-14 09:40:14,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2020-10-14 09:40:14,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2020-10-14 09:40:14,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2020-10-14 09:40:14,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:40:14,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:40:14,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:40:14,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:40:14,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (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 09:40:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:40:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:40:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:40:14,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:40:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:40:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:40:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:40:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:40:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:40:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:40:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:40:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:40:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:40:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:40:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:40:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:40:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 09:40:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:40:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:40:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:40:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:40:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:40:18,246 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:40:18,246 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:40:18,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:18 BoogieIcfgContainer [2020-10-14 09:40:18,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:40:18,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:40:18,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:40:18,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:40:18,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:40:11" (1/3) ... [2020-10-14 09:40:18,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a0e2c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:18, skipping insertion in model container [2020-10-14 09:40:18,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (2/3) ... [2020-10-14 09:40:18,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a0e2c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:18, skipping insertion in model container [2020-10-14 09:40:18,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:18" (3/3) ... [2020-10-14 09:40:18,269 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-14 09:40:18,280 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:40:18,290 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:40:18,304 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:40:18,336 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:40:18,336 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:40:18,336 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:40:18,336 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:40:18,336 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:40:18,337 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:40:18,337 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:40:18,337 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:40:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states. [2020-10-14 09:40:18,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:40:18,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:40:18,418 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 09:40:18,419 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:40:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:40:18,426 INFO L82 PathProgramCache]: Analyzing trace with hash 517770824, now seen corresponding path program 1 times [2020-10-14 09:40:18,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:40:18,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729622351] [2020-10-14 09:40:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:40:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:40:19,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:20,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:20,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:20,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:21,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:21,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:22,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:23,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:24,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:24,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:40:24,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:40:24,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:40:24,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-14 09:40:24,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:40:24,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:40:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:40:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 213 [2020-10-14 09:40:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:40:24,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:40:26,192 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:40:26,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:40:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:40:26,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:26,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:40:26,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:40:26,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:40:26,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-14 09:40:26,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:40:26,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:40:26,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:40:26,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:40:26,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:40:26,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:40:26,696 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 09:40:26,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729622351] [2020-10-14 09:40:26,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:40:26,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:40:26,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652262008] [2020-10-14 09:40:26,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:40:26,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:40:26,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:40:26,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:40:26,747 INFO L87 Difference]: Start difference. First operand 1549 states. Second operand 4 states. [2020-10-14 09:40:28,013 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 402 [2020-10-14 09:40:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:40:44,258 INFO L93 Difference]: Finished difference Result 3153 states and 5496 transitions. [2020-10-14 09:40:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:40:44,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:40:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:40:44,293 INFO L225 Difference]: With dead ends: 3153 [2020-10-14 09:40:44,293 INFO L226 Difference]: Without dead ends: 2418 [2020-10-14 09:40:44,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:40:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2020-10-14 09:40:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 2312. [2020-10-14 09:40:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-10-14 09:40:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3852 transitions. [2020-10-14 09:40:44,455 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3852 transitions. Word has length 396 [2020-10-14 09:40:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:40:44,456 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 3852 transitions. [2020-10-14 09:40:44,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:40:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3852 transitions. [2020-10-14 09:40:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:40:44,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:40:44,467 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 09:40:44,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:40:44,468 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:40:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:40:44,468 INFO L82 PathProgramCache]: Analyzing trace with hash -223797417, now seen corresponding path program 1 times [2020-10-14 09:40:44,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:40:44,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365398661] [2020-10-14 09:40:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:40:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:40:45,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:45,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:45,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:45,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:46,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:46,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:46,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:47,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:47,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:48,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:48,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:48,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:49,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:49,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:40:49,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:40:49,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:40:49,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-14 09:40:49,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:40:49,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:40:49,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:40:49,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-14 09:40:49,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 09:40:49,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:40:50,986 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:40:50,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:40:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:40:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:40:51,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:40:51,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:40:51,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:40:51,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-14 09:40:51,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:40:51,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:40:51,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:40:51,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:40:51,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:40:51,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:40:51,463 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 09:40:51,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365398661] [2020-10-14 09:40:51,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:40:51,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:40:51,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89304728] [2020-10-14 09:40:51,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:40:51,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:40:51,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:40:51,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:40:51,468 INFO L87 Difference]: Start difference. First operand 2312 states and 3852 transitions. Second operand 4 states. [2020-10-14 09:40:52,262 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-14 09:41:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:41:05,359 INFO L93 Difference]: Finished difference Result 4704 states and 7757 transitions. [2020-10-14 09:41:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:41:05,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:41:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:41:05,379 INFO L225 Difference]: With dead ends: 4704 [2020-10-14 09:41:05,379 INFO L226 Difference]: Without dead ends: 3228 [2020-10-14 09:41:05,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:41:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2020-10-14 09:41:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 3226. [2020-10-14 09:41:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3226 states. [2020-10-14 09:41:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 5338 transitions. [2020-10-14 09:41:05,499 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 5338 transitions. Word has length 396 [2020-10-14 09:41:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:41:05,500 INFO L479 AbstractCegarLoop]: Abstraction has 3226 states and 5338 transitions. [2020-10-14 09:41:05,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:41:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 5338 transitions. [2020-10-14 09:41:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:41:05,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:41:05,513 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 09:41:05,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:41:05,514 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:41:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:41:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2024744032, now seen corresponding path program 1 times [2020-10-14 09:41:05,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:41:05,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064684184] [2020-10-14 09:41:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:41:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:05,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:06,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:06,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:07,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:07,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:07,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:08,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:08,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:08,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:08,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:09,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:09,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:10,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:10,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:41:10,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:41:10,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 09:41:10,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:10,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:41:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 221 [2020-10-14 09:41:10,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:41:10,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:41:11,733 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:41:11,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:41:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:11,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:11,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:11,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:41:11,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:41:11,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-14 09:41:11,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:11,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:11,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:41:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:41:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:41:11,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:41:12,043 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 09:41:12,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064684184] [2020-10-14 09:41:12,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:41:12,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:41:12,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594652778] [2020-10-14 09:41:12,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:41:12,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:41:12,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:41:12,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:41:12,046 INFO L87 Difference]: Start difference. First operand 3226 states and 5338 transitions. Second operand 4 states. [2020-10-14 09:41:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:41:23,759 INFO L93 Difference]: Finished difference Result 7606 states and 12499 transitions. [2020-10-14 09:41:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:41:23,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:41:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:41:23,789 INFO L225 Difference]: With dead ends: 7606 [2020-10-14 09:41:23,790 INFO L226 Difference]: Without dead ends: 5384 [2020-10-14 09:41:23,796 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 09:41:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2020-10-14 09:41:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 5226. [2020-10-14 09:41:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5226 states. [2020-10-14 09:41:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 8561 transitions. [2020-10-14 09:41:24,004 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 8561 transitions. Word has length 396 [2020-10-14 09:41:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:41:24,005 INFO L479 AbstractCegarLoop]: Abstraction has 5226 states and 8561 transitions. [2020-10-14 09:41:24,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:41:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 8561 transitions. [2020-10-14 09:41:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:41:24,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:41:24,031 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 09:41:24,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:41:24,032 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:41:24,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:41:24,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1461938322, now seen corresponding path program 1 times [2020-10-14 09:41:24,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:41:24,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841132915] [2020-10-14 09:41:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:41:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:24,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:24,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:24,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:25,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:25,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:26,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:26,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:26,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:27,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:27,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:27,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:29,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:29,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:41:29,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:41:29,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 09:41:29,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:29,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:41:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-14 09:41:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:41:29,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:41:30,052 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:41:30,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:41:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:30,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:30,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:30,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:41:30,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:41:30,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 09:41:30,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:30,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:41:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:41:30,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:41:30,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:41:30,207 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 09:41:30,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841132915] [2020-10-14 09:41:30,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:41:30,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:41:30,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112797635] [2020-10-14 09:41:30,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:41:30,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:41:30,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:41:30,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:41:30,209 INFO L87 Difference]: Start difference. First operand 5226 states and 8561 transitions. Second operand 4 states. [2020-10-14 09:41:31,046 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-14 09:41:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:41:43,730 INFO L93 Difference]: Finished difference Result 12438 states and 20223 transitions. [2020-10-14 09:41:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:41:43,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:41:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:41:43,763 INFO L225 Difference]: With dead ends: 12438 [2020-10-14 09:41:43,763 INFO L226 Difference]: Without dead ends: 8028 [2020-10-14 09:41:43,772 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 09:41:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2020-10-14 09:41:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 8026. [2020-10-14 09:41:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8026 states. [2020-10-14 09:41:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 13037 transitions. [2020-10-14 09:41:44,051 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 13037 transitions. Word has length 396 [2020-10-14 09:41:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:41:44,051 INFO L479 AbstractCegarLoop]: Abstraction has 8026 states and 13037 transitions. [2020-10-14 09:41:44,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:41:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 13037 transitions. [2020-10-14 09:41:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:41:44,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:41:44,072 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 09:41:44,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:41:44,073 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:41:44,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:41:44,073 INFO L82 PathProgramCache]: Analyzing trace with hash 152788764, now seen corresponding path program 1 times [2020-10-14 09:41:44,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:41:44,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711442009] [2020-10-14 09:41:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:41:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:44,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:44,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:44,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:45,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:45,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:45,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:46,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:46,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:46,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:47,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:49,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:49,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:41:49,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:41:49,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:41:49,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:49,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:49,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:41:49,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 229 [2020-10-14 09:41:49,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:41:49,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:41:50,019 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:41:50,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:41:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:41:50,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:41:50,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:41:50,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:41:50,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:41:50,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 09:41:50,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:41:50,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:41:50,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:41:50,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:41:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:41:50,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:41:50,214 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 09:41:50,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711442009] [2020-10-14 09:41:50,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:41:50,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:41:50,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431531843] [2020-10-14 09:41:50,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:41:50,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:41:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:41:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:41:50,217 INFO L87 Difference]: Start difference. First operand 8026 states and 13037 transitions. Second operand 4 states. [2020-10-14 09:42:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:42:01,209 INFO L93 Difference]: Finished difference Result 11558 states and 18899 transitions. [2020-10-14 09:42:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:42:01,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:42:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:42:01,241 INFO L225 Difference]: With dead ends: 11558 [2020-10-14 09:42:01,242 INFO L226 Difference]: Without dead ends: 5780 [2020-10-14 09:42:01,255 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 09:42:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2020-10-14 09:42:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 5778. [2020-10-14 09:42:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5778 states. [2020-10-14 09:42:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5778 states to 5778 states and 9473 transitions. [2020-10-14 09:42:01,481 INFO L78 Accepts]: Start accepts. Automaton has 5778 states and 9473 transitions. Word has length 396 [2020-10-14 09:42:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:42:01,483 INFO L479 AbstractCegarLoop]: Abstraction has 5778 states and 9473 transitions. [2020-10-14 09:42:01,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:42:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5778 states and 9473 transitions. [2020-10-14 09:42:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:42:01,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:42:01,500 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 09:42:01,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:42:01,501 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:42:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:42:01,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1332362119, now seen corresponding path program 1 times [2020-10-14 09:42:01,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:42:01,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971846927] [2020-10-14 09:42:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:42:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:01,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:02,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:02,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:02,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:02,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:02,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:03,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:03,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:03,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:04,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:06,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:06,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:42:06,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:42:06,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5156 [2020-10-14 09:42:06,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:06,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:42:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-14 09:42:06,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:42:06,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:42:07,761 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:42:07,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:42:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:07,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:07,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:07,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:42:07,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:42:07,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 09:42:07,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:07,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:42:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:42:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:42:07,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:42:07,939 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 09:42:07,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971846927] [2020-10-14 09:42:07,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:42:07,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:42:07,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835477868] [2020-10-14 09:42:07,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:42:07,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:42:07,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:42:07,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:42:07,942 INFO L87 Difference]: Start difference. First operand 5778 states and 9473 transitions. Second operand 4 states. [2020-10-14 09:42:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:42:20,666 INFO L93 Difference]: Finished difference Result 14776 states and 24140 transitions. [2020-10-14 09:42:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:42:20,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:42:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:42:20,692 INFO L225 Difference]: With dead ends: 14776 [2020-10-14 09:42:20,692 INFO L226 Difference]: Without dead ends: 10030 [2020-10-14 09:42:20,706 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 09:42:20,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2020-10-14 09:42:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 9620. [2020-10-14 09:42:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9620 states. [2020-10-14 09:42:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9620 states to 9620 states and 15602 transitions. [2020-10-14 09:42:21,063 INFO L78 Accepts]: Start accepts. Automaton has 9620 states and 15602 transitions. Word has length 396 [2020-10-14 09:42:21,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:42:21,064 INFO L479 AbstractCegarLoop]: Abstraction has 9620 states and 15602 transitions. [2020-10-14 09:42:21,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:42:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 9620 states and 15602 transitions. [2020-10-14 09:42:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:42:21,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:42:21,081 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 09:42:21,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:42:21,081 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:42:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:42:21,082 INFO L82 PathProgramCache]: Analyzing trace with hash 212844916, now seen corresponding path program 1 times [2020-10-14 09:42:21,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:42:21,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587879769] [2020-10-14 09:42:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:42:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:21,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:21,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:21,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:22,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:22,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:22,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:22,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:22,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:23,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:26,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:26,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:42:26,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:42:26,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 09:42:26,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:26,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:26,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:42:26,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 267 [2020-10-14 09:42:26,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:42:26,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:42:27,094 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:42:27,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:42:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:27,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:27,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:27,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:42:27,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:42:27,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-14 09:42:27,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:27,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:27,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:42:27,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:42:27,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:42:27,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:42:27,253 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 09:42:27,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587879769] [2020-10-14 09:42:27,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:42:27,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:42:27,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147239172] [2020-10-14 09:42:27,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:42:27,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:42:27,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:42:27,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:42:27,256 INFO L87 Difference]: Start difference. First operand 9620 states and 15602 transitions. Second operand 4 states. [2020-10-14 09:42:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:42:38,815 INFO L93 Difference]: Finished difference Result 17080 states and 27774 transitions. [2020-10-14 09:42:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:42:38,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:42:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:42:38,839 INFO L225 Difference]: With dead ends: 17080 [2020-10-14 09:42:38,840 INFO L226 Difference]: Without dead ends: 9622 [2020-10-14 09:42:38,853 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 09:42:38,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2020-10-14 09:42:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 9620. [2020-10-14 09:42:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9620 states. [2020-10-14 09:42:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9620 states to 9620 states and 15566 transitions. [2020-10-14 09:42:39,248 INFO L78 Accepts]: Start accepts. Automaton has 9620 states and 15566 transitions. Word has length 396 [2020-10-14 09:42:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:42:39,248 INFO L479 AbstractCegarLoop]: Abstraction has 9620 states and 15566 transitions. [2020-10-14 09:42:39,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:42:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 9620 states and 15566 transitions. [2020-10-14 09:42:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:42:39,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:42:39,263 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 09:42:39,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:42:39,264 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:42:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:42:39,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1129394786, now seen corresponding path program 1 times [2020-10-14 09:42:39,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:42:39,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469054178] [2020-10-14 09:42:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:42:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:39,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:39,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:39,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:39,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:40,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:40,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:40,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:40,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:40,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:40,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:41,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:41,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:44,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:44,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:42:44,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:42:44,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-14 09:42:44,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:44,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:44,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:42:44,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 275 [2020-10-14 09:42:44,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:42:44,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:42:45,406 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:42:45,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:42:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:45,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:45,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:42:45,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:42:45,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:42:45,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 09:42:45,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:42:45,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:42:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:42:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:42:45,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:42:45,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:42:45,597 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 09:42:45,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469054178] [2020-10-14 09:42:45,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:42:45,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:42:45,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379936293] [2020-10-14 09:42:45,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:42:45,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:42:45,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:42:45,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:42:45,600 INFO L87 Difference]: Start difference. First operand 9620 states and 15566 transitions. Second operand 4 states. [2020-10-14 09:42:46,386 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification that was a NOOP. DAG size: 402 [2020-10-14 09:42:58,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:42:58,441 INFO L93 Difference]: Finished difference Result 16776 states and 27224 transitions. [2020-10-14 09:42:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:42:58,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:42:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:42:58,460 INFO L225 Difference]: With dead ends: 16776 [2020-10-14 09:42:58,460 INFO L226 Difference]: Without dead ends: 9622 [2020-10-14 09:42:58,473 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 09:42:58,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2020-10-14 09:42:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 9620. [2020-10-14 09:42:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9620 states. [2020-10-14 09:42:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9620 states to 9620 states and 15530 transitions. [2020-10-14 09:42:58,881 INFO L78 Accepts]: Start accepts. Automaton has 9620 states and 15530 transitions. Word has length 396 [2020-10-14 09:42:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:42:58,882 INFO L479 AbstractCegarLoop]: Abstraction has 9620 states and 15530 transitions. [2020-10-14 09:42:58,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:42:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 9620 states and 15530 transitions. [2020-10-14 09:42:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:42:58,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:42:58,898 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 09:42:58,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:42:58,898 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:42:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:42:58,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1513946357, now seen corresponding path program 1 times [2020-10-14 09:42:58,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:42:58,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724376804] [2020-10-14 09:42:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:42:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:42:59,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:59,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:59,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:42:59,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:00,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:00,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:00,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:00,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:01,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:01,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:01,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:01,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:04,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:04,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:43:04,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 09:43:04,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 09:43:04,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:04,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:04,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:43:04,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-14 09:43:04,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:43:04,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:04,913 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:43:04,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:43:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:04,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:04,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:04,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:43:04,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:43:04,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:43:04,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:04,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:43:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:43:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:43:04,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:05,039 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 09:43:05,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724376804] [2020-10-14 09:43:05,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:43:05,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:43:05,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703375869] [2020-10-14 09:43:05,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:43:05,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:43:05,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:43:05,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:43:05,041 INFO L87 Difference]: Start difference. First operand 9620 states and 15530 transitions. Second operand 4 states. [2020-10-14 09:43:05,847 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-14 09:43:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:43:15,744 INFO L93 Difference]: Finished difference Result 9624 states and 15532 transitions. [2020-10-14 09:43:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:43:15,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:43:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:43:15,755 INFO L225 Difference]: With dead ends: 9624 [2020-10-14 09:43:15,755 INFO L226 Difference]: Without dead ends: 5102 [2020-10-14 09:43:15,765 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 09:43:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2020-10-14 09:43:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 5100. [2020-10-14 09:43:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5100 states. [2020-10-14 09:43:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 8276 transitions. [2020-10-14 09:43:16,107 INFO L78 Accepts]: Start accepts. Automaton has 5100 states and 8276 transitions. Word has length 396 [2020-10-14 09:43:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:43:16,108 INFO L479 AbstractCegarLoop]: Abstraction has 5100 states and 8276 transitions. [2020-10-14 09:43:16,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:43:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5100 states and 8276 transitions. [2020-10-14 09:43:16,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:43:16,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:43:16,117 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 09:43:16,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:43:16,117 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:43:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:43:16,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1470713646, now seen corresponding path program 1 times [2020-10-14 09:43:16,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:43:16,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530960629] [2020-10-14 09:43:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:43:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:16,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:16,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:16,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:16,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:17,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:17,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:17,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:17,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:17,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:17,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:18,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:18,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:18,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:21,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:21,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:43:21,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:43:21,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 09:43:21,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:21,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:43:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 313 [2020-10-14 09:43:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:43:21,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:22,138 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:43:22,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:43:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:22,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:22,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:22,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:43:22,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:43:22,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 09:43:22,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:22,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:43:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:43:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:43:22,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:22,304 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 09:43:22,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530960629] [2020-10-14 09:43:22,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:43:22,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:43:22,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578557431] [2020-10-14 09:43:22,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:43:22,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:43:22,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:43:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:43:22,306 INFO L87 Difference]: Start difference. First operand 5100 states and 8276 transitions. Second operand 4 states. [2020-10-14 09:43:23,132 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 402 [2020-10-14 09:43:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:43:35,323 INFO L93 Difference]: Finished difference Result 8912 states and 14468 transitions. [2020-10-14 09:43:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:43:35,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:43:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:43:35,333 INFO L225 Difference]: With dead ends: 8912 [2020-10-14 09:43:35,333 INFO L226 Difference]: Without dead ends: 5102 [2020-10-14 09:43:35,342 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 09:43:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2020-10-14 09:43:35,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 5100. [2020-10-14 09:43:35,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5100 states. [2020-10-14 09:43:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 8258 transitions. [2020-10-14 09:43:35,527 INFO L78 Accepts]: Start accepts. Automaton has 5100 states and 8258 transitions. Word has length 396 [2020-10-14 09:43:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:43:35,528 INFO L479 AbstractCegarLoop]: Abstraction has 5100 states and 8258 transitions. [2020-10-14 09:43:35,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:43:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5100 states and 8258 transitions. [2020-10-14 09:43:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:43:35,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:43:35,535 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 09:43:35,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:43:35,535 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:43:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:43:35,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1274463994, now seen corresponding path program 1 times [2020-10-14 09:43:35,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:43:35,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331609894] [2020-10-14 09:43:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:43:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:36,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:36,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:36,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:37,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:37,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:37,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:37,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:37,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:40,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:40,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:43:40,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 09:43:40,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 09:43:40,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:40,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:43:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-14 09:43:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 09:43:40,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:41,712 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:43:41,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:43:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:41,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:41,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:41,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:43:41,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:43:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 09:43:41,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:41,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:43:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:43:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:43:41,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:41,852 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 09:43:41,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331609894] [2020-10-14 09:43:41,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:43:41,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:43:41,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634517868] [2020-10-14 09:43:41,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:43:41,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:43:41,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:43:41,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:43:41,854 INFO L87 Difference]: Start difference. First operand 5100 states and 8258 transitions. Second operand 4 states. [2020-10-14 09:43:42,657 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-14 09:43:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:43:51,936 INFO L93 Difference]: Finished difference Result 5104 states and 8260 transitions. [2020-10-14 09:43:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:43:51,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-14 09:43:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:43:51,942 INFO L225 Difference]: With dead ends: 5104 [2020-10-14 09:43:51,942 INFO L226 Difference]: Without dead ends: 2826 [2020-10-14 09:43:51,946 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 09:43:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2020-10-14 09:43:52,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2824. [2020-10-14 09:43:52,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-10-14 09:43:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 4612 transitions. [2020-10-14 09:43:52,025 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 4612 transitions. Word has length 396 [2020-10-14 09:43:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:43:52,026 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 4612 transitions. [2020-10-14 09:43:52,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:43:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 4612 transitions. [2020-10-14 09:43:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-14 09:43:52,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:43:52,032 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 09:43:52,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:43:52,032 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:43:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:43:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash 256009634, now seen corresponding path program 1 times [2020-10-14 09:43:52,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:43:52,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264220220] [2020-10-14 09:43:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:43:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:52,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:52,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:53,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:53,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:53,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:53,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:53,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:53,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:54,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:54,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:57,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:57,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-14 09:43:57,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 09:43:57,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-14 09:43:57,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:57,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:43:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 340 [2020-10-14 09:43:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 09:43:57,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:43:58,111 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-14 09:43:58,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:43:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:43:58,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:43:58,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:43:58,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:43:58,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:43:58,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:43:58,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:43:58,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:43:58,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:43:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:43:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:43:58,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:43:58,249 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 09:43:58,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264220220] [2020-10-14 09:43:58,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:43:58,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:43:58,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23122101] [2020-10-14 09:43:58,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:43:58,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:43:58,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:43:58,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:43:58,252 INFO L87 Difference]: Start difference. First operand 2824 states and 4612 transitions. Second operand 4 states. [2020-10-14 09:43:59,088 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 396