/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_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:22:59,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:22:59,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:22:59,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:22:59,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:22:59,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:22:59,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:22:59,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:22:59,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:22:59,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:22:59,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:22:59,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:22:59,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:22:59,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:22:59,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:22:59,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:22:59,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:22:59,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:22:59,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:22:59,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:22:59,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:22:59,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:22:59,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:22:59,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:22:59,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:22:59,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:22:59,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:22:59,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:22:59,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:22:59,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:22:59,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:22:59,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:22:59,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:22:59,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:22:59,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:22:59,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:22:59,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:22:59,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:22:59,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:22:59,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:22:59,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:22:59,233 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 08:22:59,266 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:22:59,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:22:59,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:22:59,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:22:59,268 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:22:59,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:22:59,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:22:59,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:22:59,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:22:59,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:22:59,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:22:59,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:22:59,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:22:59,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:22:59,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:22:59,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:22:59,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:22:59,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:22:59,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:22:59,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:22:59,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:22:59,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:22:59,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:22:59,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:22:59,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:22:59,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:22:59,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:22:59,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:22:59,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:22:59,274 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 08:22:59,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:22:59,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:22:59,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:22:59,595 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:22:59,595 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:22:59,596 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:22:59,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b6c24abf/30b96d384b9d42429aa88c1813c62565/FLAG1c89ff691 [2020-10-14 08:23:00,141 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:23:00,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:23:00,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b6c24abf/30b96d384b9d42429aa88c1813c62565/FLAG1c89ff691 [2020-10-14 08:23:00,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b6c24abf/30b96d384b9d42429aa88c1813c62565 [2020-10-14 08:23:00,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:23:00,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:23:00,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:23:00,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:23:00,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:23:00,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:23:00" (1/1) ... [2020-10-14 08:23:00,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586f660a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:00, skipping insertion in model container [2020-10-14 08:23:00,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:23:00" (1/1) ... [2020-10-14 08:23:00,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:23:00,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:23:00,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:23:00,914 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:23:01,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:23:01,033 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:23:01,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:01 WrapperNode [2020-10-14 08:23:01,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:23:01,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:23:01,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:23:01,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:23:01,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:01" (1/1) ... [2020-10-14 08:23:01,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:01" (1/1) ... [2020-10-14 08:23:01,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:01" (1/1) ... [2020-10-14 08:23:01,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:01" (1/1) ... [2020-10-14 08:23:01,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:01" (1/1) ... [2020-10-14 08:23:01,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:01" (1/1) ... [2020-10-14 08:23:01,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:01" (1/1) ... [2020-10-14 08:23:01,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:23:01,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:23:01,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:23:01,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:23:01,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:01" (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 08:23:01,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:23:01,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:23:01,178 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:23:01,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:23:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:23:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:23:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:23:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:23:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:23:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:23:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:23:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:23:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:23:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:23:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:23:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:23:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:23:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:23:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:23:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:23:01,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:23:01,921 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:23:01,921 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:23:01,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:23:01 BoogieIcfgContainer [2020-10-14 08:23:01,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:23:01,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:23:01,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:23:01,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:23:01,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:23:00" (1/3) ... [2020-10-14 08:23:01,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bb3873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:23:01, skipping insertion in model container [2020-10-14 08:23:01,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:23:01" (2/3) ... [2020-10-14 08:23:01,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bb3873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:23:01, skipping insertion in model container [2020-10-14 08:23:01,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:23:01" (3/3) ... [2020-10-14 08:23:01,935 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:23:01,945 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:23:01,953 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:23:01,967 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:23:01,993 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:23:01,993 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:23:01,993 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:23:01,993 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:23:01,994 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:23:01,994 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:23:01,994 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:23:01,994 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:23:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-14 08:23:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 08:23:02,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:02,029 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] [2020-10-14 08:23:02,030 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1611542725, now seen corresponding path program 1 times [2020-10-14 08:23:02,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:02,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659864818] [2020-10-14 08:23:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:02,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:02,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:03,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:04,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:04,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 08:23:04,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:23:04,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2280 [2020-10-14 08:23:04,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:04,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:23:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:23:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:23:04,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 08:23:05,015 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:23:05,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:05,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:05,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:05,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:05,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:05,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-14 08:23:05,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:05,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:05,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:05,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:05,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:05,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:05,087 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 08:23:05,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659864818] [2020-10-14 08:23:05,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:05,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:23:05,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891332100] [2020-10-14 08:23:05,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:23:05,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:05,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:23:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:05,115 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 4 states. [2020-10-14 08:23:05,356 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:23:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:06,061 INFO L93 Difference]: Finished difference Result 312 states and 523 transitions. [2020-10-14 08:23:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:23:06,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-14 08:23:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:06,078 INFO L225 Difference]: With dead ends: 312 [2020-10-14 08:23:06,078 INFO L226 Difference]: Without dead ends: 217 [2020-10-14 08:23:06,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-14 08:23:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2020-10-14 08:23:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 08:23:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 339 transitions. [2020-10-14 08:23:06,157 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 339 transitions. Word has length 60 [2020-10-14 08:23:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:06,158 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 339 transitions. [2020-10-14 08:23:06,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:23:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 339 transitions. [2020-10-14 08:23:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 08:23:06,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:06,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:23:06,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:23:06,165 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash -536473390, now seen corresponding path program 1 times [2020-10-14 08:23:06,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:06,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724291795] [2020-10-14 08:23:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:06,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:06,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:06,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:06,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:07,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:10,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:10,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 08:23:10,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:23:10,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4003 [2020-10-14 08:23:10,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:10,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:10,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:23:10,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 08:23:10,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 08:23:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:10,498 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:23:10,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:10,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:10,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:10,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:10,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:10,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:23:10,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:10,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:10,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:10,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:10,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:10,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:10,545 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 08:23:10,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724291795] [2020-10-14 08:23:10,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:10,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:23:10,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747451652] [2020-10-14 08:23:10,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:23:10,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:10,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:23:10,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:10,550 INFO L87 Difference]: Start difference. First operand 214 states and 339 transitions. Second operand 4 states. [2020-10-14 08:23:10,812 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:23:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:11,571 INFO L93 Difference]: Finished difference Result 512 states and 839 transitions. [2020-10-14 08:23:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:23:11,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-14 08:23:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:11,575 INFO L225 Difference]: With dead ends: 512 [2020-10-14 08:23:11,576 INFO L226 Difference]: Without dead ends: 356 [2020-10-14 08:23:11,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-14 08:23:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2020-10-14 08:23:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-14 08:23:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 569 transitions. [2020-10-14 08:23:11,608 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 569 transitions. Word has length 62 [2020-10-14 08:23:11,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:11,609 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 569 transitions. [2020-10-14 08:23:11,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:23:11,609 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 569 transitions. [2020-10-14 08:23:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 08:23:11,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:11,616 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] [2020-10-14 08:23:11,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:23:11,617 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:11,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1824743771, now seen corresponding path program 1 times [2020-10-14 08:23:11,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:11,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893993719] [2020-10-14 08:23:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:11,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:11,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:11,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:12,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:12,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:12,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:16,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:16,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 08:23:16,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:23:16,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 08:23:16,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:16,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:23:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 08:23:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 08:23:16,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:16,997 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:23:16,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:17,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:17,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:17,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:17,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:23:17,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:17,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:17,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:17,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:17,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:17,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:17,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893993719] [2020-10-14 08:23:17,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:17,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:23:17,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143849176] [2020-10-14 08:23:17,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:23:17,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:17,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:23:17,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:17,041 INFO L87 Difference]: Start difference. First operand 352 states and 569 transitions. Second operand 4 states. [2020-10-14 08:23:17,317 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:23:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:17,967 INFO L93 Difference]: Finished difference Result 864 states and 1423 transitions. [2020-10-14 08:23:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:23:17,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-14 08:23:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:17,974 INFO L225 Difference]: With dead ends: 864 [2020-10-14 08:23:17,974 INFO L226 Difference]: Without dead ends: 570 [2020-10-14 08:23:17,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-10-14 08:23:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 564. [2020-10-14 08:23:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-10-14 08:23:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 901 transitions. [2020-10-14 08:23:18,022 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 901 transitions. Word has length 64 [2020-10-14 08:23:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:18,023 INFO L479 AbstractCegarLoop]: Abstraction has 564 states and 901 transitions. [2020-10-14 08:23:18,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:23:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 901 transitions. [2020-10-14 08:23:18,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 08:23:18,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:18,025 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] [2020-10-14 08:23:18,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:23:18,025 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash -82593166, now seen corresponding path program 1 times [2020-10-14 08:23:18,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:18,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529266986] [2020-10-14 08:23:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:18,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:18,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:18,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:18,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:18,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:20,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:20,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:23,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:23,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 08:23:23,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:23:23,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:23:23,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:23,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:23,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:23:23,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:23:23,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 08:23:23,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 08:23:23,350 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:23:23,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:23,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:23,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:23,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:23,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:23:23,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:23,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:23,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:23,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:23,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:23,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:23,394 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 08:23:23,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529266986] [2020-10-14 08:23:23,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:23,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:23:23,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961267632] [2020-10-14 08:23:23,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:23:23,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:23,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:23:23,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:23,399 INFO L87 Difference]: Start difference. First operand 564 states and 901 transitions. Second operand 5 states. [2020-10-14 08:23:24,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:24,273 INFO L93 Difference]: Finished difference Result 1588 states and 2557 transitions. [2020-10-14 08:23:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:23:24,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-14 08:23:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:24,281 INFO L225 Difference]: With dead ends: 1588 [2020-10-14 08:23:24,281 INFO L226 Difference]: Without dead ends: 1082 [2020-10-14 08:23:24,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:23:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-10-14 08:23:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-10-14 08:23:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-10-14 08:23:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1719 transitions. [2020-10-14 08:23:24,381 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1719 transitions. Word has length 66 [2020-10-14 08:23:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:24,383 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1719 transitions. [2020-10-14 08:23:24,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:23:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1719 transitions. [2020-10-14 08:23:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:23:24,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:24,388 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] [2020-10-14 08:23:24,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:23:24,388 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1006683073, now seen corresponding path program 1 times [2020-10-14 08:23:24,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:24,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415126858] [2020-10-14 08:23:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:24,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:24,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:24,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:24,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:24,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:24,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:25,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:27,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:29,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:29,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:23:29,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:23:29,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 08:23:29,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:29,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:29,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:23:29,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:23:29,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:23:29,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 08:23:29,659 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:23:29,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:29,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:29,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:29,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:29,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:29,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:23:29,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:29,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:29,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:29,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:29,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:29,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:29,688 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 08:23:29,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415126858] [2020-10-14 08:23:29,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:29,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:23:29,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145745686] [2020-10-14 08:23:29,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:23:29,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:29,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:23:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:29,692 INFO L87 Difference]: Start difference. First operand 1080 states and 1719 transitions. Second operand 4 states. [2020-10-14 08:23:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:30,420 INFO L93 Difference]: Finished difference Result 3150 states and 5007 transitions. [2020-10-14 08:23:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:23:30,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:23:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:30,433 INFO L225 Difference]: With dead ends: 3150 [2020-10-14 08:23:30,433 INFO L226 Difference]: Without dead ends: 2118 [2020-10-14 08:23:30,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2020-10-14 08:23:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1086. [2020-10-14 08:23:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1086 states. [2020-10-14 08:23:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1727 transitions. [2020-10-14 08:23:30,521 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1727 transitions. Word has length 67 [2020-10-14 08:23:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:30,522 INFO L479 AbstractCegarLoop]: Abstraction has 1086 states and 1727 transitions. [2020-10-14 08:23:30,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:23:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1727 transitions. [2020-10-14 08:23:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:23:30,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:30,523 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] [2020-10-14 08:23:30,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:23:30,524 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:30,524 INFO L82 PathProgramCache]: Analyzing trace with hash 43240883, now seen corresponding path program 1 times [2020-10-14 08:23:30,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:30,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242307908] [2020-10-14 08:23:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:30,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:31,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:31,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:35,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:35,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:23:35,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:23:35,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:23:35,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:35,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:23:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:23:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 08:23:35,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:35,804 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:23:35,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:35,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:35,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:35,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:35,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:35,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:23:35,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:35,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:35,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:35,856 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 08:23:35,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242307908] [2020-10-14 08:23:35,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:35,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:23:35,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101527299] [2020-10-14 08:23:35,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:23:35,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:35,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:23:35,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:35,860 INFO L87 Difference]: Start difference. First operand 1086 states and 1727 transitions. Second operand 5 states. [2020-10-14 08:23:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:36,932 INFO L93 Difference]: Finished difference Result 3138 states and 4991 transitions. [2020-10-14 08:23:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:23:36,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-14 08:23:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:36,945 INFO L225 Difference]: With dead ends: 3138 [2020-10-14 08:23:36,946 INFO L226 Difference]: Without dead ends: 2077 [2020-10-14 08:23:36,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:23:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2020-10-14 08:23:37,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 2075. [2020-10-14 08:23:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2020-10-14 08:23:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 3275 transitions. [2020-10-14 08:23:37,128 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 3275 transitions. Word has length 68 [2020-10-14 08:23:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:37,129 INFO L479 AbstractCegarLoop]: Abstraction has 2075 states and 3275 transitions. [2020-10-14 08:23:37,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:23:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 3275 transitions. [2020-10-14 08:23:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 08:23:37,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:37,132 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] [2020-10-14 08:23:37,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:23:37,133 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash -700964608, now seen corresponding path program 1 times [2020-10-14 08:23:37,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:37,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593604375] [2020-10-14 08:23:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:37,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:37,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:37,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:37,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:37,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:37,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:39,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:41,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:42,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:42,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 08:23:42,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:23:42,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:23:42,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:42,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:42,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:23:42,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:23:42,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:23:42,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:42,381 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:23:42,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:42,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:42,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:42,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:42,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:42,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:23:42,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:42,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:42,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:42,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:42,415 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 08:23:42,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593604375] [2020-10-14 08:23:42,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:42,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:23:42,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091041148] [2020-10-14 08:23:42,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:23:42,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:42,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:23:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:42,419 INFO L87 Difference]: Start difference. First operand 2075 states and 3275 transitions. Second operand 4 states. [2020-10-14 08:23:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:43,271 INFO L93 Difference]: Finished difference Result 6070 states and 9615 transitions. [2020-10-14 08:23:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:23:43,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-14 08:23:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:43,291 INFO L225 Difference]: With dead ends: 6070 [2020-10-14 08:23:43,291 INFO L226 Difference]: Without dead ends: 4117 [2020-10-14 08:23:43,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:43,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2020-10-14 08:23:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 2081. [2020-10-14 08:23:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2020-10-14 08:23:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3283 transitions. [2020-10-14 08:23:43,503 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3283 transitions. Word has length 69 [2020-10-14 08:23:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:43,503 INFO L479 AbstractCegarLoop]: Abstraction has 2081 states and 3283 transitions. [2020-10-14 08:23:43,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:23:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3283 transitions. [2020-10-14 08:23:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:23:43,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:43,511 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] [2020-10-14 08:23:43,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:23:43,512 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:43,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1224513272, now seen corresponding path program 1 times [2020-10-14 08:23:43,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:43,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410463816] [2020-10-14 08:23:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:43,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:43,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:43,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:43,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:43,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:44,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:44,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:45,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:48,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:48,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:23:48,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:23:48,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:23:48,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:48,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:48,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:23:48,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:23:48,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:23:48,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:48,734 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:23:48,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:48,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:48,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:48,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:48,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:48,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:23:48,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:48,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:48,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:48,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410463816] [2020-10-14 08:23:48,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:48,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:23:48,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087074934] [2020-10-14 08:23:48,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:23:48,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:23:48,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:48,780 INFO L87 Difference]: Start difference. First operand 2081 states and 3283 transitions. Second operand 4 states. [2020-10-14 08:23:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:49,924 INFO L93 Difference]: Finished difference Result 5828 states and 9297 transitions. [2020-10-14 08:23:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:23:49,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 08:23:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:49,943 INFO L225 Difference]: With dead ends: 5828 [2020-10-14 08:23:49,943 INFO L226 Difference]: Without dead ends: 3954 [2020-10-14 08:23:49,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:23:49,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2020-10-14 08:23:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3952. [2020-10-14 08:23:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3952 states. [2020-10-14 08:23:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 6239 transitions. [2020-10-14 08:23:50,224 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 6239 transitions. Word has length 70 [2020-10-14 08:23:50,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:50,224 INFO L479 AbstractCegarLoop]: Abstraction has 3952 states and 6239 transitions. [2020-10-14 08:23:50,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:23:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 6239 transitions. [2020-10-14 08:23:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:23:50,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:50,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:23:50,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:23:50,229 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:50,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:50,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1285525397, now seen corresponding path program 1 times [2020-10-14 08:23:50,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:50,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967889454] [2020-10-14 08:23:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:50,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:50,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:50,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:50,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:50,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:50,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:50,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:51,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:51,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:55,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:55,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:23:55,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:23:55,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:23:55,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:55,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:55,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:23:55,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:23:55,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 08:23:55,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:55,427 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:23:55,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:55,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:55,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:55,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:55,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:55,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:23:55,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:55,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:55,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:55,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:23:55,459 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 08:23:55,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967889454] [2020-10-14 08:23:55,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:55,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:23:55,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373598711] [2020-10-14 08:23:55,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:23:55,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:55,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:23:55,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:55,461 INFO L87 Difference]: Start difference. First operand 3952 states and 6239 transitions. Second operand 5 states. [2020-10-14 08:23:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:56,546 INFO L93 Difference]: Finished difference Result 11257 states and 17865 transitions. [2020-10-14 08:23:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:23:56,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 08:23:56,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:56,583 INFO L225 Difference]: With dead ends: 11257 [2020-10-14 08:23:56,584 INFO L226 Difference]: Without dead ends: 7492 [2020-10-14 08:23:56,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:23:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7492 states. [2020-10-14 08:23:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7492 to 7490. [2020-10-14 08:23:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7490 states. [2020-10-14 08:23:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 11768 transitions. [2020-10-14 08:23:57,200 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 11768 transitions. Word has length 70 [2020-10-14 08:23:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:57,201 INFO L479 AbstractCegarLoop]: Abstraction has 7490 states and 11768 transitions. [2020-10-14 08:23:57,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:23:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 11768 transitions. [2020-10-14 08:23:57,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:23:57,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:57,208 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] [2020-10-14 08:23:57,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:23:57,209 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:57,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:57,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1739945303, now seen corresponding path program 1 times [2020-10-14 08:23:57,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:57,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593489260] [2020-10-14 08:23:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:57,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:57,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:57,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:57,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:57,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:57,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:59,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:02,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:02,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:24:02,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:24:02,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:24:02,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:02,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:02,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:24:02,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 08:24:02,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 08:24:02,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:02,392 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:24:02,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:24:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:02,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:02,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:02,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:24:02,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:24:02,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:24:02,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:02,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:02,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:24:02,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:24:02,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:24:02,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:02,418 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 08:24:02,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593489260] [2020-10-14 08:24:02,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:24:02,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:24:02,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953029327] [2020-10-14 08:24:02,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:24:02,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:24:02,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:24:02,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:24:02,420 INFO L87 Difference]: Start difference. First operand 7490 states and 11768 transitions. Second operand 4 states. [2020-10-14 08:24:02,599 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:24:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:24:03,736 INFO L93 Difference]: Finished difference Result 14224 states and 22640 transitions. [2020-10-14 08:24:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:24:03,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 08:24:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:24:03,774 INFO L225 Difference]: With dead ends: 14224 [2020-10-14 08:24:03,774 INFO L226 Difference]: Without dead ends: 10436 [2020-10-14 08:24:03,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:24:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10436 states. [2020-10-14 08:24:04,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10436 to 10434. [2020-10-14 08:24:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10434 states. [2020-10-14 08:24:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10434 states to 10434 states and 16442 transitions. [2020-10-14 08:24:04,503 INFO L78 Accepts]: Start accepts. Automaton has 10434 states and 16442 transitions. Word has length 70 [2020-10-14 08:24:04,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:24:04,503 INFO L479 AbstractCegarLoop]: Abstraction has 10434 states and 16442 transitions. [2020-10-14 08:24:04,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:24:04,504 INFO L276 IsEmpty]: Start isEmpty. Operand 10434 states and 16442 transitions. [2020-10-14 08:24:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:24:04,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:04,508 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] [2020-10-14 08:24:04,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:24:04,508 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:04,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1315458060, now seen corresponding path program 1 times [2020-10-14 08:24:04,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:04,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788386171] [2020-10-14 08:24:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:04,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:04,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:04,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:04,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:04,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:04,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:05,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:09,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:09,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:24:09,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:24:09,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:24:09,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:09,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:09,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:24:09,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:24:09,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 08:24:09,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:09,769 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:24:09,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:24:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:09,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:09,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:09,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:24:09,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:24:09,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:24:09,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:09,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:09,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:24:09,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:24:09,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:24:09,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:09,796 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 08:24:09,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788386171] [2020-10-14 08:24:09,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:24:09,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:24:09,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137874742] [2020-10-14 08:24:09,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:24:09,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:24:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:24:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:24:09,798 INFO L87 Difference]: Start difference. First operand 10434 states and 16442 transitions. Second operand 5 states. [2020-10-14 08:24:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:24:11,071 INFO L93 Difference]: Finished difference Result 22584 states and 35579 transitions. [2020-10-14 08:24:11,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:24:11,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 08:24:11,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:24:11,098 INFO L225 Difference]: With dead ends: 22584 [2020-10-14 08:24:11,099 INFO L226 Difference]: Without dead ends: 12163 [2020-10-14 08:24:11,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:24:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12163 states. [2020-10-14 08:24:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12163 to 10759. [2020-10-14 08:24:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10759 states. [2020-10-14 08:24:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10759 states to 10759 states and 16848 transitions. [2020-10-14 08:24:11,706 INFO L78 Accepts]: Start accepts. Automaton has 10759 states and 16848 transitions. Word has length 70 [2020-10-14 08:24:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:24:11,706 INFO L479 AbstractCegarLoop]: Abstraction has 10759 states and 16848 transitions. [2020-10-14 08:24:11,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:24:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 10759 states and 16848 transitions. [2020-10-14 08:24:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:24:11,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:11,712 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] [2020-10-14 08:24:11,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:24:11,712 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash 95044415, now seen corresponding path program 1 times [2020-10-14 08:24:11,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:11,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507232547] [2020-10-14 08:24:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:11,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:11,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:11,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:11,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:11,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:12,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:14,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:16,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:16,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:24:16,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:24:16,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:24:16,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:16,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:24:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:24:16,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:24:16,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:16,893 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:24:16,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:24:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:16,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:16,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:16,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:24:16,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:24:16,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:24:16,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:16,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:16,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:24:16,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:24:16,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:24:16,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:16,916 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 08:24:16,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507232547] [2020-10-14 08:24:16,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:24:16,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:24:16,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130038090] [2020-10-14 08:24:16,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:24:16,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:24:16,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:24:16,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:24:16,918 INFO L87 Difference]: Start difference. First operand 10759 states and 16848 transitions. Second operand 4 states. [2020-10-14 08:24:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:24:18,614 INFO L93 Difference]: Finished difference Result 31826 states and 49956 transitions. [2020-10-14 08:24:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:24:18,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 08:24:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:24:18,657 INFO L225 Difference]: With dead ends: 31826 [2020-10-14 08:24:18,658 INFO L226 Difference]: Without dead ends: 21462 [2020-10-14 08:24:18,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:24:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21462 states. [2020-10-14 08:24:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21462 to 10762. [2020-10-14 08:24:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10762 states. [2020-10-14 08:24:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10762 states to 10762 states and 16852 transitions. [2020-10-14 08:24:19,576 INFO L78 Accepts]: Start accepts. Automaton has 10762 states and 16852 transitions. Word has length 71 [2020-10-14 08:24:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:24:19,576 INFO L479 AbstractCegarLoop]: Abstraction has 10762 states and 16852 transitions. [2020-10-14 08:24:19,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:24:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 10762 states and 16852 transitions. [2020-10-14 08:24:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 08:24:19,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:19,581 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] [2020-10-14 08:24:19,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:24:19,581 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1863697099, now seen corresponding path program 1 times [2020-10-14 08:24:19,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:19,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296711437] [2020-10-14 08:24:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:19,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:19,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:19,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:19,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:19,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:19,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:19,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:24,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:24,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 08:24:24,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:24:24,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:24:24,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:24,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:24,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:24:24,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:24:24,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 08:24:24,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:24,782 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:24:24,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:24:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:24,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:24,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:24,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:24:24,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:24:24,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:24:24,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:24,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:24,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:24:24,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:24:24,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:24:24,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:24,805 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 08:24:24,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296711437] [2020-10-14 08:24:24,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:24:24,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:24:24,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024239248] [2020-10-14 08:24:24,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:24:24,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:24:24,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:24:24,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:24:24,807 INFO L87 Difference]: Start difference. First operand 10762 states and 16852 transitions. Second operand 6 states. [2020-10-14 08:24:24,996 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-14 08:24:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:24:28,416 INFO L93 Difference]: Finished difference Result 57342 states and 91706 transitions. [2020-10-14 08:24:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:24:28,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-14 08:24:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:24:28,488 INFO L225 Difference]: With dead ends: 57342 [2020-10-14 08:24:28,489 INFO L226 Difference]: Without dead ends: 47596 [2020-10-14 08:24:28,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:24:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47596 states. [2020-10-14 08:24:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47596 to 20154. [2020-10-14 08:24:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20154 states. [2020-10-14 08:24:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20154 states to 20154 states and 31668 transitions. [2020-10-14 08:24:31,055 INFO L78 Accepts]: Start accepts. Automaton has 20154 states and 31668 transitions. Word has length 72 [2020-10-14 08:24:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:24:31,055 INFO L479 AbstractCegarLoop]: Abstraction has 20154 states and 31668 transitions. [2020-10-14 08:24:31,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:24:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 20154 states and 31668 transitions. [2020-10-14 08:24:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 08:24:31,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:31,060 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] [2020-10-14 08:24:31,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:24:31,061 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -2001645673, now seen corresponding path program 1 times [2020-10-14 08:24:31,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:31,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115259785] [2020-10-14 08:24:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:31,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:31,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:31,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:31,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:31,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:31,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:31,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:36,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:36,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 08:24:36,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:24:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:24:36,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:36,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:24:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:24:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:24:36,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:36,285 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:24:36,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:24:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:36,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:36,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:36,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:24:36,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:24:36,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:24:36,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:36,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:36,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:24:36,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:24:36,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:24:36,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:36,303 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 08:24:36,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115259785] [2020-10-14 08:24:36,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:24:36,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:24:36,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325044936] [2020-10-14 08:24:36,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:24:36,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:24:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:24:36,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:24:36,305 INFO L87 Difference]: Start difference. First operand 20154 states and 31668 transitions. Second operand 5 states. [2020-10-14 08:24:36,484 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:24:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:24:40,649 INFO L93 Difference]: Finished difference Result 74576 states and 118135 transitions. [2020-10-14 08:24:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:24:40,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-14 08:24:40,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:24:40,742 INFO L225 Difference]: With dead ends: 74576 [2020-10-14 08:24:40,743 INFO L226 Difference]: Without dead ends: 55470 [2020-10-14 08:24:40,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:24:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55470 states. [2020-10-14 08:24:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55470 to 37650. [2020-10-14 08:24:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37650 states. [2020-10-14 08:24:43,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37650 states to 37650 states and 59044 transitions. [2020-10-14 08:24:43,570 INFO L78 Accepts]: Start accepts. Automaton has 37650 states and 59044 transitions. Word has length 73 [2020-10-14 08:24:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:24:43,570 INFO L479 AbstractCegarLoop]: Abstraction has 37650 states and 59044 transitions. [2020-10-14 08:24:43,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:24:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 37650 states and 59044 transitions. [2020-10-14 08:24:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 08:24:43,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:43,577 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] [2020-10-14 08:24:43,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:24:43,577 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:43,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1722607378, now seen corresponding path program 1 times [2020-10-14 08:24:43,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:43,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127219035] [2020-10-14 08:24:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:43,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:43,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:43,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:43,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:43,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:44,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:48,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:48,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 08:24:48,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:24:48,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:24:48,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:48,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:48,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:24:48,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 08:24:48,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 08:24:48,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:48,755 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:24:48,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:24:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:48,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:48,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:48,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:24:48,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:24:48,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:24:48,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:48,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:48,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:24:48,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:24:48,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:24:48,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:24:48,776 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 08:24:48,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127219035] [2020-10-14 08:24:48,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:24:48,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:24:48,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288029056] [2020-10-14 08:24:48,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:24:48,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:24:48,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:24:48,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:24:48,777 INFO L87 Difference]: Start difference. First operand 37650 states and 59044 transitions. Second operand 4 states. [2020-10-14 08:24:48,952 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:24:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:24:53,199 INFO L93 Difference]: Finished difference Result 72086 states and 113894 transitions. [2020-10-14 08:24:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:24:53,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 08:24:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:24:53,268 INFO L225 Difference]: With dead ends: 72086 [2020-10-14 08:24:53,269 INFO L226 Difference]: Without dead ends: 51668 [2020-10-14 08:24:53,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:24:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51668 states. [2020-10-14 08:24:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51668 to 51666. [2020-10-14 08:24:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51666 states. [2020-10-14 08:24:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51666 states to 51666 states and 80932 transitions. [2020-10-14 08:24:57,027 INFO L78 Accepts]: Start accepts. Automaton has 51666 states and 80932 transitions. Word has length 73 [2020-10-14 08:24:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:24:57,028 INFO L479 AbstractCegarLoop]: Abstraction has 51666 states and 80932 transitions. [2020-10-14 08:24:57,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:24:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 51666 states and 80932 transitions. [2020-10-14 08:24:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 08:24:57,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:57,031 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] [2020-10-14 08:24:57,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:24:57,032 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:57,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1614212952, now seen corresponding path program 1 times [2020-10-14 08:24:57,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:57,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379813429] [2020-10-14 08:24:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:57,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:57,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:57,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:57,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:57,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:58,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:02,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:02,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 08:25:02,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:25:02,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:25:02,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:02,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:02,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:25:02,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 08:25:02,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 08:25:02,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:02,209 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:02,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:02,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:02,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:02,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:02,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:02,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:25:02,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:02,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:02,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:02,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:02,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:02,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:02,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379813429] [2020-10-14 08:25:02,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:02,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:25:02,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629090537] [2020-10-14 08:25:02,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:25:02,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:02,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:25:02,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:25:02,229 INFO L87 Difference]: Start difference. First operand 51666 states and 80932 transitions. Second operand 4 states. [2020-10-14 08:25:02,406 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:25:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:07,885 INFO L93 Difference]: Finished difference Result 121902 states and 192942 transitions. [2020-10-14 08:25:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:25:07,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 08:25:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:07,982 INFO L225 Difference]: With dead ends: 121902 [2020-10-14 08:25:07,982 INFO L226 Difference]: Without dead ends: 71244 [2020-10-14 08:25:08,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:25:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71244 states. [2020-10-14 08:25:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71244 to 71242. [2020-10-14 08:25:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71242 states. [2020-10-14 08:25:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71242 states to 71242 states and 112692 transitions. [2020-10-14 08:25:14,599 INFO L78 Accepts]: Start accepts. Automaton has 71242 states and 112692 transitions. Word has length 73 [2020-10-14 08:25:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:14,599 INFO L479 AbstractCegarLoop]: Abstraction has 71242 states and 112692 transitions. [2020-10-14 08:25:14,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:25:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand 71242 states and 112692 transitions. [2020-10-14 08:25:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 08:25:14,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:14,601 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] [2020-10-14 08:25:14,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:25:14,602 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:14,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1978526148, now seen corresponding path program 1 times [2020-10-14 08:25:14,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:14,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716271164] [2020-10-14 08:25:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:14,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:14,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:14,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:14,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:14,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:19,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:19,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 08:25:19,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:25:19,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:25:19,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:19,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:25:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 08:25:19,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:25:19,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:19,788 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:19,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:19,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:19,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:19,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:19,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:19,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:25:19,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:19,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:19,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:19,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:19,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:19,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:19,806 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 08:25:19,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716271164] [2020-10-14 08:25:19,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:19,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:25:19,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816303870] [2020-10-14 08:25:19,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:25:19,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:19,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:25:19,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:25:19,808 INFO L87 Difference]: Start difference. First operand 71242 states and 112692 transitions. Second operand 5 states. [2020-10-14 08:25:19,983 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:25:33,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:33,082 INFO L93 Difference]: Finished difference Result 229208 states and 364703 transitions. [2020-10-14 08:25:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:25:33,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 08:25:33,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:33,325 INFO L225 Difference]: With dead ends: 229208 [2020-10-14 08:25:33,325 INFO L226 Difference]: Without dead ends: 158974 [2020-10-14 08:25:33,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:25:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158974 states. [2020-10-14 08:25:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158974 to 114578. [2020-10-14 08:25:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114578 states. [2020-10-14 08:25:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114578 states to 114578 states and 180332 transitions. [2020-10-14 08:25:44,930 INFO L78 Accepts]: Start accepts. Automaton has 114578 states and 180332 transitions. Word has length 74 [2020-10-14 08:25:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:44,931 INFO L479 AbstractCegarLoop]: Abstraction has 114578 states and 180332 transitions. [2020-10-14 08:25:44,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:25:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 114578 states and 180332 transitions. [2020-10-14 08:25:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 08:25:44,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:44,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:25:44,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:25:44,934 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:44,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1257262850, now seen corresponding path program 1 times [2020-10-14 08:25:44,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:44,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581612801] [2020-10-14 08:25:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:44,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:45,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:45,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:45,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:45,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:49,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:49,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 08:25:49,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:25:49,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:25:49,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:49,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:25:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 08:25:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:25:49,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:50,119 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:50,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:50,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:50,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:50,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:50,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:50,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:25:50,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:50,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:50,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:50,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:50,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:50,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:50,138 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 08:25:50,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581612801] [2020-10-14 08:25:50,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:50,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:25:50,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121516704] [2020-10-14 08:25:50,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:25:50,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:50,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:25:50,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:25:50,139 INFO L87 Difference]: Start difference. First operand 114578 states and 180332 transitions. Second operand 5 states. [2020-10-14 08:25:50,313 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:26:12,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:26:12,743 INFO L93 Difference]: Finished difference Result 362040 states and 572015 transitions. [2020-10-14 08:26:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:26:12,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-14 08:26:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:26:13,154 INFO L225 Difference]: With dead ends: 362040 [2020-10-14 08:26:13,154 INFO L226 Difference]: Without dead ends: 248470 [2020-10-14 08:26:13,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:26:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248470 states. [2020-10-14 08:26:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248470 to 180706. [2020-10-14 08:26:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180706 states. [2020-10-14 08:26:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180706 states to 180706 states and 282548 transitions. [2020-10-14 08:26:28,020 INFO L78 Accepts]: Start accepts. Automaton has 180706 states and 282548 transitions. Word has length 75 [2020-10-14 08:26:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:26:28,021 INFO L479 AbstractCegarLoop]: Abstraction has 180706 states and 282548 transitions. [2020-10-14 08:26:28,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:26:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 180706 states and 282548 transitions. [2020-10-14 08:26:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 08:26:28,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:26:28,023 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] [2020-10-14 08:26:28,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 08:26:28,023 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:26:28,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:26:28,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1461543374, now seen corresponding path program 1 times [2020-10-14 08:26:28,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:26:28,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350497103] [2020-10-14 08:26:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:26:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:28,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:28,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:28,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:28,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:28,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:28,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:28,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:34,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:34,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 08:26:34,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:26:34,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5963 [2020-10-14 08:26:34,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:34,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:26:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:26:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 08:26:34,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:34,219 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:26:34,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:26:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:34,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:34,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:34,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:26:34,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:26:34,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:26:34,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:34,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:26:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:26:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:26:34,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:34,241 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 08:26:34,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350497103] [2020-10-14 08:26:34,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:26:34,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:26:34,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672334938] [2020-10-14 08:26:34,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:26:34,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:26:34,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:26:34,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:26:34,243 INFO L87 Difference]: Start difference. First operand 180706 states and 282548 transitions. Second operand 6 states. [2020-10-14 08:26:34,456 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 165