/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:08:01,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:08:01,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:08:01,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:08:01,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:08:01,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:08:01,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:08:01,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:08:01,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:08:01,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:08:01,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:08:01,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:08:01,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:08:01,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:08:01,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:08:01,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:08:01,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:08:01,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:08:01,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:08:01,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:08:01,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:08:01,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:08:01,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:08:01,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:08:01,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:08:01,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:08:01,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:08:01,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:08:01,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:08:01,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:08:01,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:08:01,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:08:01,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:08:01,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:08:01,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:08:01,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:08:01,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:08:01,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:08:01,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:08:01,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:08:01,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:08:01,122 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 [2020-10-28 00:08:01,175 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:08:01,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:08:01,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:08:01,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:08:01,178 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:08:01,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:08:01,179 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:08:01,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:08:01,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:08:01,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:08:01,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:08:01,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:08:01,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:08:01,182 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:08:01,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:08:01,182 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:08:01,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:08:01,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:08:01,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:08:01,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:08:01,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:08:01,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:08:01,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:08:01,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:08:01,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:08:01,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:08:01,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:08:01,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:08:01,186 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:08:01,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:08:01,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:08:01,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:08:01,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:08:01,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:08:01,659 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:08:01,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:08:01,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0697a6e17/ca3f97985f07404baa620c75d011c31f/FLAG6b51306b1 [2020-10-28 00:08:02,451 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:08:02,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:08:02,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0697a6e17/ca3f97985f07404baa620c75d011c31f/FLAG6b51306b1 [2020-10-28 00:08:02,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0697a6e17/ca3f97985f07404baa620c75d011c31f [2020-10-28 00:08:02,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:08:02,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:08:02,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:08:02,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:08:02,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:08:02,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:08:02" (1/1) ... [2020-10-28 00:08:02,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aab947b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:02, skipping insertion in model container [2020-10-28 00:08:02,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:08:02" (1/1) ... [2020-10-28 00:08:02,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:08:02,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:08:03,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:08:03,224 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:08:03,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:08:03,386 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:08:03,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:03 WrapperNode [2020-10-28 00:08:03,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:08:03,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:08:03,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:08:03,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:08:03,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:03" (1/1) ... [2020-10-28 00:08:03,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:03" (1/1) ... [2020-10-28 00:08:03,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:03" (1/1) ... [2020-10-28 00:08:03,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:03" (1/1) ... [2020-10-28 00:08:03,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:03" (1/1) ... [2020-10-28 00:08:03,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:03" (1/1) ... [2020-10-28 00:08:03,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:03" (1/1) ... [2020-10-28 00:08:03,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:08:03,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:08:03,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:08:03,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:08:03,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:03" (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 [2020-10-28 00:08:03,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:08:03,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:08:03,593 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:08:03,594 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:08:03,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:08:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:08:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:08:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:08:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:08:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:08:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:08:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:08:03,597 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:08:03,597 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:08:03,597 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:08:03,598 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:08:03,598 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:08:03,598 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:08:03,599 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:08:03,599 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:08:03,599 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:08:03,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:08:03,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:08:03,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:08:03,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:08:03,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:08:03,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:08:03,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:08:04,556 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:08:04,556 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:08:04,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:08:04 BoogieIcfgContainer [2020-10-28 00:08:04,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:08:04,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:08:04,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:08:04,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:08:04,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:08:02" (1/3) ... [2020-10-28 00:08:04,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3808ac7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:08:04, skipping insertion in model container [2020-10-28 00:08:04,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:08:03" (2/3) ... [2020-10-28 00:08:04,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3808ac7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:08:04, skipping insertion in model container [2020-10-28 00:08:04,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:08:04" (3/3) ... [2020-10-28 00:08:04,569 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:08:04,579 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:08:04,584 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:08:04,598 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:08:04,627 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:08:04,627 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:08:04,627 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:08:04,628 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:08:04,628 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:08:04,628 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:08:04,628 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:08:04,628 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:08:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-10-28 00:08:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:08:04,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:04,663 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] [2020-10-28 00:08:04,663 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1313524885, now seen corresponding path program 1 times [2020-10-28 00:08:04,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:04,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123025298] [2020-10-28 00:08:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:05,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:05,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:07,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:07,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:08:07,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:08:07,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2253 [2020-10-28 00:08:07,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:07,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:07,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:08:07,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 00:08:07,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:08:07,670 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:07,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:07,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:07,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:07,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:07,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:08:07,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:07,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:07,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123025298] [2020-10-28 00:08:07,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:07,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:07,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061532569] [2020-10-28 00:08:07,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:07,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:07,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:07,753 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 4 states. [2020-10-28 00:08:08,018 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:08:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:08,997 INFO L93 Difference]: Finished difference Result 321 states and 516 transitions. [2020-10-28 00:08:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:08,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 00:08:09,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:09,013 INFO L225 Difference]: With dead ends: 321 [2020-10-28 00:08:09,013 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 00:08:09,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:08:09,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 00:08:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-10-28 00:08:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 00:08:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 355 transitions. [2020-10-28 00:08:09,090 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 355 transitions. Word has length 54 [2020-10-28 00:08:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:09,091 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 355 transitions. [2020-10-28 00:08:09,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 355 transitions. [2020-10-28 00:08:09,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:08:09,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:09,094 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] [2020-10-28 00:08:09,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:08:09,094 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:09,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:09,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1142379061, now seen corresponding path program 1 times [2020-10-28 00:08:09,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:09,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316295900] [2020-10-28 00:08:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:09,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:09,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:09,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:09,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:10,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:14,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:08:14,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:14,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:08:14,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:14,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:14,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 00:08:14,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:08:14,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:08:14,401 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:14,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:14,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:14,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:14,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:14,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:08:14,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:14,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:14,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:14,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:14,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:08:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:14,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316295900] [2020-10-28 00:08:14,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:14,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:14,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818452833] [2020-10-28 00:08:14,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:14,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:14,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:14,451 INFO L87 Difference]: Start difference. First operand 238 states and 355 transitions. Second operand 4 states. [2020-10-28 00:08:14,683 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 00:08:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:15,461 INFO L93 Difference]: Finished difference Result 574 states and 879 transitions. [2020-10-28 00:08:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:15,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 00:08:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:15,466 INFO L225 Difference]: With dead ends: 574 [2020-10-28 00:08:15,466 INFO L226 Difference]: Without dead ends: 407 [2020-10-28 00:08:15,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:08:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-28 00:08:15,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 404. [2020-10-28 00:08:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-28 00:08:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 607 transitions. [2020-10-28 00:08:15,508 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 607 transitions. Word has length 57 [2020-10-28 00:08:15,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:15,509 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 607 transitions. [2020-10-28 00:08:15,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:15,509 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 607 transitions. [2020-10-28 00:08:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:08:15,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:15,512 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] [2020-10-28 00:08:15,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:08:15,513 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash -915987511, now seen corresponding path program 1 times [2020-10-28 00:08:15,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:15,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634726905] [2020-10-28 00:08:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:15,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:20,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:20,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:08:20,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:20,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:08:20,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:08:20,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:08:20,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:08:20,817 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:20,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:20,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:20,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:20,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:20,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:20,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:08:20,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:20,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:20,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:20,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:20,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:08:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:20,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634726905] [2020-10-28 00:08:20,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:20,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:20,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921240199] [2020-10-28 00:08:20,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:20,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:20,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:20,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:20,864 INFO L87 Difference]: Start difference. First operand 404 states and 607 transitions. Second operand 4 states. [2020-10-28 00:08:21,068 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 00:08:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:21,722 INFO L93 Difference]: Finished difference Result 978 states and 1493 transitions. [2020-10-28 00:08:21,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:21,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 00:08:21,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:21,729 INFO L225 Difference]: With dead ends: 978 [2020-10-28 00:08:21,729 INFO L226 Difference]: Without dead ends: 693 [2020-10-28 00:08:21,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:08:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-10-28 00:08:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 690. [2020-10-28 00:08:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-28 00:08:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1033 transitions. [2020-10-28 00:08:21,813 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1033 transitions. Word has length 57 [2020-10-28 00:08:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:21,813 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 1033 transitions. [2020-10-28 00:08:21,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1033 transitions. [2020-10-28 00:08:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:08:21,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:21,823 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] [2020-10-28 00:08:21,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:08:21,823 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1907474551, now seen corresponding path program 1 times [2020-10-28 00:08:21,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:21,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479648607] [2020-10-28 00:08:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:21,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:21,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:21,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:22,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:22,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:26,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:26,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:08:26,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:26,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:08:26,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:08:26,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:08:26,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 00:08:27,118 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:27,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:27,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:27,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:27,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:27,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:27,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:08:27,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:27,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:27,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479648607] [2020-10-28 00:08:27,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:27,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:27,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968823428] [2020-10-28 00:08:27,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:27,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:27,151 INFO L87 Difference]: Start difference. First operand 690 states and 1033 transitions. Second operand 4 states. [2020-10-28 00:08:27,368 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 00:08:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:28,194 INFO L93 Difference]: Finished difference Result 1766 states and 2659 transitions. [2020-10-28 00:08:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:28,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 00:08:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:28,202 INFO L225 Difference]: With dead ends: 1766 [2020-10-28 00:08:28,202 INFO L226 Difference]: Without dead ends: 1171 [2020-10-28 00:08:28,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:08:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2020-10-28 00:08:28,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1168. [2020-10-28 00:08:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-10-28 00:08:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1715 transitions. [2020-10-28 00:08:28,285 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1715 transitions. Word has length 57 [2020-10-28 00:08:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:28,285 INFO L481 AbstractCegarLoop]: Abstraction has 1168 states and 1715 transitions. [2020-10-28 00:08:28,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1715 transitions. [2020-10-28 00:08:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:08:28,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:28,291 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] [2020-10-28 00:08:28,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:08:28,291 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1674236509, now seen corresponding path program 1 times [2020-10-28 00:08:28,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:28,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799644586] [2020-10-28 00:08:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:28,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:28,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:31,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:08:31,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:31,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3096 [2020-10-28 00:08:31,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:31,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:31,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:31,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:08:31,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:31,670 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:31,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:31,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:31,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:31,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:31,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:08:31,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:31,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:31,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799644586] [2020-10-28 00:08:31,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:31,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:08:31,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974990815] [2020-10-28 00:08:31,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:31,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:31,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:31,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:31,705 INFO L87 Difference]: Start difference. First operand 1168 states and 1715 transitions. Second operand 6 states. [2020-10-28 00:08:32,341 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:08:33,045 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:08:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:33,223 INFO L93 Difference]: Finished difference Result 4420 states and 6538 transitions. [2020-10-28 00:08:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:08:33,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 00:08:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:33,249 INFO L225 Difference]: With dead ends: 4420 [2020-10-28 00:08:33,249 INFO L226 Difference]: Without dead ends: 3561 [2020-10-28 00:08:33,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2020-10-28 00:08:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 1196. [2020-10-28 00:08:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2020-10-28 00:08:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1727 transitions. [2020-10-28 00:08:33,375 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1727 transitions. Word has length 58 [2020-10-28 00:08:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:33,378 INFO L481 AbstractCegarLoop]: Abstraction has 1196 states and 1727 transitions. [2020-10-28 00:08:33,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1727 transitions. [2020-10-28 00:08:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:08:33,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:33,386 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] [2020-10-28 00:08:33,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:08:33,386 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:33,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1014371839, now seen corresponding path program 1 times [2020-10-28 00:08:33,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:33,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607624343] [2020-10-28 00:08:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:33,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:35,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:35,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:08:35,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:35,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2558 [2020-10-28 00:08:35,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:35,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:35,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:35,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:08:35,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:36,243 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:36,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:36,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:36,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:36,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:36,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:36,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:08:36,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:36,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:36,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:08:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:36,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607624343] [2020-10-28 00:08:36,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:36,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:08:36,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381447095] [2020-10-28 00:08:36,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:36,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:36,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:36,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:36,294 INFO L87 Difference]: Start difference. First operand 1196 states and 1727 transitions. Second operand 6 states. [2020-10-28 00:08:36,952 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:08:37,621 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:08:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:37,865 INFO L93 Difference]: Finished difference Result 5050 states and 7317 transitions. [2020-10-28 00:08:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:08:37,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 00:08:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:37,893 INFO L225 Difference]: With dead ends: 5050 [2020-10-28 00:08:37,893 INFO L226 Difference]: Without dead ends: 4245 [2020-10-28 00:08:37,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:37,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2020-10-28 00:08:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 1308. [2020-10-28 00:08:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2020-10-28 00:08:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 1847 transitions. [2020-10-28 00:08:38,104 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 1847 transitions. Word has length 58 [2020-10-28 00:08:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:38,105 INFO L481 AbstractCegarLoop]: Abstraction has 1308 states and 1847 transitions. [2020-10-28 00:08:38,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 1847 transitions. [2020-10-28 00:08:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:08:38,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:38,109 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] [2020-10-28 00:08:38,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:08:38,109 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:38,110 INFO L82 PathProgramCache]: Analyzing trace with hash -388207116, now seen corresponding path program 1 times [2020-10-28 00:08:38,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:38,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78706812] [2020-10-28 00:08:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:38,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:38,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:38,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:38,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:38,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:40,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:40,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:08:40,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:08:40,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2759 [2020-10-28 00:08:40,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:40,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:40,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:40,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:08:40,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:41,130 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:41,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:41,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:41,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:41,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:41,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:08:41,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:41,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:41,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78706812] [2020-10-28 00:08:41,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:41,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:08:41,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656164769] [2020-10-28 00:08:41,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:41,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:41,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:41,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:41,157 INFO L87 Difference]: Start difference. First operand 1308 states and 1847 transitions. Second operand 6 states. [2020-10-28 00:08:41,782 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:08:42,522 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:08:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:42,760 INFO L93 Difference]: Finished difference Result 6105 states and 8702 transitions. [2020-10-28 00:08:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:08:42,761 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 00:08:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:42,788 INFO L225 Difference]: With dead ends: 6105 [2020-10-28 00:08:42,789 INFO L226 Difference]: Without dead ends: 5258 [2020-10-28 00:08:42,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2020-10-28 00:08:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 1435. [2020-10-28 00:08:42,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1435 states. [2020-10-28 00:08:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1972 transitions. [2020-10-28 00:08:42,961 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 1972 transitions. Word has length 58 [2020-10-28 00:08:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:42,962 INFO L481 AbstractCegarLoop]: Abstraction has 1435 states and 1972 transitions. [2020-10-28 00:08:42,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 1972 transitions. [2020-10-28 00:08:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:08:42,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:42,964 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] [2020-10-28 00:08:42,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:08:42,965 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:42,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash 929553127, now seen corresponding path program 1 times [2020-10-28 00:08:42,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:42,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029150666] [2020-10-28 00:08:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:42,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:44,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:44,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:46,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:46,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:47,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:47,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:08:47,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:08:47,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:08:47,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:47,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:08:47,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:47,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:08:47,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:48,386 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 24 [2020-10-28 00:08:48,632 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:48,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:48,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:48,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:48,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:48,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:48,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:08:48,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:48,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:48,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029150666] [2020-10-28 00:08:48,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:48,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:08:48,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107154376] [2020-10-28 00:08:48,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:08:48,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:48,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:08:48,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:08:48,680 INFO L87 Difference]: Start difference. First operand 1435 states and 1972 transitions. Second operand 11 states. [2020-10-28 00:08:48,961 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 00:08:50,254 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:08:52,397 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:08:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:52,618 INFO L93 Difference]: Finished difference Result 6097 states and 8522 transitions. [2020-10-28 00:08:52,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 00:08:52,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 00:08:52,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:52,644 INFO L225 Difference]: With dead ends: 6097 [2020-10-28 00:08:52,644 INFO L226 Difference]: Without dead ends: 5181 [2020-10-28 00:08:52,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2020-10-28 00:08:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5181 states. [2020-10-28 00:08:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5181 to 1522. [2020-10-28 00:08:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1522 states. [2020-10-28 00:08:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2074 transitions. [2020-10-28 00:08:52,837 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2074 transitions. Word has length 59 [2020-10-28 00:08:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:52,837 INFO L481 AbstractCegarLoop]: Abstraction has 1522 states and 2074 transitions. [2020-10-28 00:08:52,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:08:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2074 transitions. [2020-10-28 00:08:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:08:52,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:52,840 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] [2020-10-28 00:08:52,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:08:52,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1747762406, now seen corresponding path program 1 times [2020-10-28 00:08:52,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:52,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761452096] [2020-10-28 00:08:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:52,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:52,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:52,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:53,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:53,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:55,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:55,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:57,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:57,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:08:57,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:08:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:08:57,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:08:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:08:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:58,292 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:08:58,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:58,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:58,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:58,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:58,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:58,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:08:58,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:58,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:58,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:58,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:58,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:58,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761452096] [2020-10-28 00:08:58,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:58,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:08:58,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377464253] [2020-10-28 00:08:58,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:08:58,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:58,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:08:58,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:08:58,325 INFO L87 Difference]: Start difference. First operand 1522 states and 2074 transitions. Second operand 11 states. [2020-10-28 00:08:58,556 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 00:09:00,284 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:09:02,389 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:09:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:02,813 INFO L93 Difference]: Finished difference Result 10674 states and 14918 transitions. [2020-10-28 00:09:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:09:02,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 00:09:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:02,856 INFO L225 Difference]: With dead ends: 10674 [2020-10-28 00:09:02,857 INFO L226 Difference]: Without dead ends: 9803 [2020-10-28 00:09:02,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:09:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2020-10-28 00:09:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 1749. [2020-10-28 00:09:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1749 states. [2020-10-28 00:09:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 2367 transitions. [2020-10-28 00:09:03,110 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 2367 transitions. Word has length 59 [2020-10-28 00:09:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:03,110 INFO L481 AbstractCegarLoop]: Abstraction has 1749 states and 2367 transitions. [2020-10-28 00:09:03,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:09:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 2367 transitions. [2020-10-28 00:09:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 00:09:03,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:03,114 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] [2020-10-28 00:09:03,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:09:03,114 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:03,115 INFO L82 PathProgramCache]: Analyzing trace with hash 890121976, now seen corresponding path program 1 times [2020-10-28 00:09:03,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:03,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245399506] [2020-10-28 00:09:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:03,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:03,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:03,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:03,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:03,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:03,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:03,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:04,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:04,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:04,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:08,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 00:09:08,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:09:08,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:09:08,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:08,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:09:08,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:09:08,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:09:08,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:08,494 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:09:08,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:08,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:08,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:08,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:08,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:09:08,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:08,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:08,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:08,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:08,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:08,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245399506] [2020-10-28 00:09:08,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:08,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:09:08,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544283365] [2020-10-28 00:09:08,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:09:08,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:08,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:09:08,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:09:08,528 INFO L87 Difference]: Start difference. First operand 1749 states and 2367 transitions. Second operand 11 states. [2020-10-28 00:09:08,813 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 00:09:10,207 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:09:11,618 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:09:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:12,266 INFO L93 Difference]: Finished difference Result 10013 states and 14030 transitions. [2020-10-28 00:09:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:09:12,267 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 00:09:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:12,294 INFO L225 Difference]: With dead ends: 10013 [2020-10-28 00:09:12,294 INFO L226 Difference]: Without dead ends: 9094 [2020-10-28 00:09:12,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:09:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9094 states. [2020-10-28 00:09:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9094 to 1933. [2020-10-28 00:09:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1933 states. [2020-10-28 00:09:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 2594 transitions. [2020-10-28 00:09:12,555 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 2594 transitions. Word has length 59 [2020-10-28 00:09:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:12,556 INFO L481 AbstractCegarLoop]: Abstraction has 1933 states and 2594 transitions. [2020-10-28 00:09:12,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:09:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 2594 transitions. [2020-10-28 00:09:12,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:09:12,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:12,560 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] [2020-10-28 00:09:12,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:09:12,560 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash 641760451, now seen corresponding path program 1 times [2020-10-28 00:09:12,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:12,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139917490] [2020-10-28 00:09:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:12,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:12,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:12,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:12,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:12,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:12,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:13,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:13,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:13,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:13,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:14,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:14,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:14,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:17,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:17,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:09:17,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:09:17,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:09:17,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:09:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 00:09:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:09:17,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:17,807 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:09:17,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:17,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:17,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:17,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:17,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:17,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:09:17,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:17,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:17,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:17,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:17,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:17,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139917490] [2020-10-28 00:09:17,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:17,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:09:17,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281368449] [2020-10-28 00:09:17,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:09:17,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:17,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:09:17,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:09:17,841 INFO L87 Difference]: Start difference. First operand 1933 states and 2594 transitions. Second operand 6 states. [2020-10-28 00:09:18,054 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 00:09:18,751 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:09:19,551 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:09:19,758 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:09:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:19,847 INFO L93 Difference]: Finished difference Result 4002 states and 5572 transitions. [2020-10-28 00:09:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:09:19,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 00:09:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:19,857 INFO L225 Difference]: With dead ends: 4002 [2020-10-28 00:09:19,857 INFO L226 Difference]: Without dead ends: 3287 [2020-10-28 00:09:19,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:09:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2020-10-28 00:09:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 2077. [2020-10-28 00:09:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2020-10-28 00:09:20,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 2822 transitions. [2020-10-28 00:09:20,115 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 2822 transitions. Word has length 60 [2020-10-28 00:09:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:20,115 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 2822 transitions. [2020-10-28 00:09:20,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:09:20,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 2822 transitions. [2020-10-28 00:09:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:09:20,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:20,119 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] [2020-10-28 00:09:20,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:09:20,119 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:20,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1247822508, now seen corresponding path program 1 times [2020-10-28 00:09:20,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:20,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090751294] [2020-10-28 00:09:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:20,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:21,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:23,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:25,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:25,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:09:25,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:09:25,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:09:25,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:09:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:09:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:09:25,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:25,363 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:09:25,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:25,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:25,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:25,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:25,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:25,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:09:25,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:25,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:25,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:25,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:25,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:25,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090751294] [2020-10-28 00:09:25,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:25,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:09:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197429098] [2020-10-28 00:09:25,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:09:25,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:09:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:09:25,389 INFO L87 Difference]: Start difference. First operand 2077 states and 2822 transitions. Second operand 6 states. [2020-10-28 00:09:25,611 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:09:26,711 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:09:27,022 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:09:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:29,216 INFO L93 Difference]: Finished difference Result 10237 states and 14640 transitions. [2020-10-28 00:09:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:09:29,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 00:09:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:29,237 INFO L225 Difference]: With dead ends: 10237 [2020-10-28 00:09:29,237 INFO L226 Difference]: Without dead ends: 8866 [2020-10-28 00:09:29,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:09:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8866 states. [2020-10-28 00:09:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8866 to 5114. [2020-10-28 00:09:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5114 states. [2020-10-28 00:09:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 7220 transitions. [2020-10-28 00:09:30,056 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 7220 transitions. Word has length 60 [2020-10-28 00:09:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:30,056 INFO L481 AbstractCegarLoop]: Abstraction has 5114 states and 7220 transitions. [2020-10-28 00:09:30,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:09:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 7220 transitions. [2020-10-28 00:09:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:09:30,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:30,061 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] [2020-10-28 00:09:30,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:09:30,061 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:30,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1032494710, now seen corresponding path program 1 times [2020-10-28 00:09:30,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:30,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717659186] [2020-10-28 00:09:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:30,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:30,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:30,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:30,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:30,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:30,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:31,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:31,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:31,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:31,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:31,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:31,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:32,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:35,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:35,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:09:35,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:09:35,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:09:35,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:35,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:09:35,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:09:35,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:09:35,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:35,381 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 28 [2020-10-28 00:09:35,644 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:09:35,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:35,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:35,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:35,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:35,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:35,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:09:35,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:35,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:35,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:35,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:35,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:35,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717659186] [2020-10-28 00:09:35,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:35,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 00:09:35,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760340976] [2020-10-28 00:09:35,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:09:35,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:09:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:09:35,667 INFO L87 Difference]: Start difference. First operand 5114 states and 7220 transitions. Second operand 12 states. [2020-10-28 00:09:36,164 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 145 [2020-10-28 00:09:36,649 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-28 00:09:37,845 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 00:09:38,090 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 00:09:41,389 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:09:41,798 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 00:09:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:45,302 INFO L93 Difference]: Finished difference Result 36838 states and 52383 transitions. [2020-10-28 00:09:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 00:09:45,306 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-28 00:09:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:45,366 INFO L225 Difference]: With dead ends: 36838 [2020-10-28 00:09:45,366 INFO L226 Difference]: Without dead ends: 32907 [2020-10-28 00:09:45,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=306, Invalid=1334, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 00:09:45,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32907 states. [2020-10-28 00:09:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32907 to 8814. [2020-10-28 00:09:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8814 states. [2020-10-28 00:09:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8814 states to 8814 states and 12601 transitions. [2020-10-28 00:09:47,087 INFO L78 Accepts]: Start accepts. Automaton has 8814 states and 12601 transitions. Word has length 60 [2020-10-28 00:09:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:47,088 INFO L481 AbstractCegarLoop]: Abstraction has 8814 states and 12601 transitions. [2020-10-28 00:09:47,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 00:09:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8814 states and 12601 transitions. [2020-10-28 00:09:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:09:47,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:47,092 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] [2020-10-28 00:09:47,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:09:47,093 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:47,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1938806004, now seen corresponding path program 1 times [2020-10-28 00:09:47,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:47,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86515350] [2020-10-28 00:09:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:47,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:47,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:47,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:47,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:47,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:47,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:48,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:52,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:52,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:09:52,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:09:52,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4912 [2020-10-28 00:09:52,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:52,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:09:52,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:09:52,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:09:52,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:52,239 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:09:52,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:52,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:52,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:52,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:52,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:09:52,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:52,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86515350] [2020-10-28 00:09:52,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:52,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:09:52,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063441506] [2020-10-28 00:09:52,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:09:52,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:52,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:09:52,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:09:52,269 INFO L87 Difference]: Start difference. First operand 8814 states and 12601 transitions. Second operand 6 states. [2020-10-28 00:09:52,476 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:09:53,592 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:09:53,834 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:09:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:59,918 INFO L93 Difference]: Finished difference Result 43637 states and 63391 transitions. [2020-10-28 00:09:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:09:59,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 00:09:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:59,974 INFO L225 Difference]: With dead ends: 43637 [2020-10-28 00:09:59,974 INFO L226 Difference]: Without dead ends: 36798 [2020-10-28 00:09:59,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:10:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36798 states. [2020-10-28 00:10:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36798 to 16267. [2020-10-28 00:10:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16267 states. [2020-10-28 00:10:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16267 states to 16267 states and 23387 transitions. [2020-10-28 00:10:02,596 INFO L78 Accepts]: Start accepts. Automaton has 16267 states and 23387 transitions. Word has length 60 [2020-10-28 00:10:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:02,596 INFO L481 AbstractCegarLoop]: Abstraction has 16267 states and 23387 transitions. [2020-10-28 00:10:02,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:10:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 16267 states and 23387 transitions. [2020-10-28 00:10:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 00:10:02,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:02,602 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] [2020-10-28 00:10:02,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:10:02,603 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:02,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:02,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1047827148, now seen corresponding path program 1 times [2020-10-28 00:10:02,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:02,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131420674] [2020-10-28 00:10:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:02,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:03,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:04,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:07,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 00:10:07,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:10:07,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:10:07,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:10:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:10:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:10:07,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:07,918 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:10:07,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:07,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:07,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:07,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131420674] [2020-10-28 00:10:07,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:07,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:10:07,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584814181] [2020-10-28 00:10:07,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:10:07,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:07,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:10:07,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:10:07,940 INFO L87 Difference]: Start difference. First operand 16267 states and 23387 transitions. Second operand 6 states. [2020-10-28 00:10:08,185 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 00:10:09,013 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:10:11,783 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:10:12,032 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:10:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:15,373 INFO L93 Difference]: Finished difference Result 49687 states and 71777 transitions. [2020-10-28 00:10:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:10:15,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-28 00:10:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:15,425 INFO L225 Difference]: With dead ends: 49687 [2020-10-28 00:10:15,425 INFO L226 Difference]: Without dead ends: 39060 [2020-10-28 00:10:15,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:10:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39060 states. [2020-10-28 00:10:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39060 to 21331. [2020-10-28 00:10:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21331 states. [2020-10-28 00:10:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21331 states to 21331 states and 30871 transitions. [2020-10-28 00:10:18,902 INFO L78 Accepts]: Start accepts. Automaton has 21331 states and 30871 transitions. Word has length 61 [2020-10-28 00:10:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:18,902 INFO L481 AbstractCegarLoop]: Abstraction has 21331 states and 30871 transitions. [2020-10-28 00:10:18,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:10:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 21331 states and 30871 transitions. [2020-10-28 00:10:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 00:10:18,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:18,907 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] [2020-10-28 00:10:18,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:10:18,908 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash -388321369, now seen corresponding path program 1 times [2020-10-28 00:10:18,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:18,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302917692] [2020-10-28 00:10:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:18,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:23,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:23,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 00:10:23,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:10:23,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:10:23,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:23,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:10:23,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:10:23,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:10:23,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:24,164 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:10:24,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:24,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:24,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:24,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:24,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:24,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:10:24,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:24,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:24,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302917692] [2020-10-28 00:10:24,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:24,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:10:24,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299295466] [2020-10-28 00:10:24,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:10:24,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:24,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:10:24,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:10:24,189 INFO L87 Difference]: Start difference. First operand 21331 states and 30871 transitions. Second operand 6 states. [2020-10-28 00:10:24,429 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 00:10:25,437 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:10:28,223 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:10:28,445 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 00:10:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:32,640 INFO L93 Difference]: Finished difference Result 54173 states and 78269 transitions. [2020-10-28 00:10:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:10:32,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-28 00:10:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:32,687 INFO L225 Difference]: With dead ends: 54173 [2020-10-28 00:10:32,687 INFO L226 Difference]: Without dead ends: 43546 [2020-10-28 00:10:32,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:10:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43546 states. [2020-10-28 00:10:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43546 to 26038. [2020-10-28 00:10:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26038 states. [2020-10-28 00:10:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26038 states to 26038 states and 37792 transitions. [2020-10-28 00:10:37,159 INFO L78 Accepts]: Start accepts. Automaton has 26038 states and 37792 transitions. Word has length 61 [2020-10-28 00:10:37,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:37,160 INFO L481 AbstractCegarLoop]: Abstraction has 26038 states and 37792 transitions. [2020-10-28 00:10:37,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:10:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 26038 states and 37792 transitions. [2020-10-28 00:10:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 00:10:37,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:37,169 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] [2020-10-28 00:10:37,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:10:37,169 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:37,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1355962137, now seen corresponding path program 1 times [2020-10-28 00:10:37,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:37,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039062987] [2020-10-28 00:10:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:37,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:37,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:37,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:37,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:37,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:38,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:38,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:39,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:39,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:39,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:39,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:39,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:39,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:40,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:40,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:40,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:40,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:41,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:42,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:42,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:42,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:42,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 00:10:42,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-28 00:10:42,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:10:42,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:42,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:10:42,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:10:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:10:42,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:42,513 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 28 [2020-10-28 00:10:42,786 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:10:42,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:42,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:42,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:42,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:42,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:42,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:10:42,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:42,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:42,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:42,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:42,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:42,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039062987] [2020-10-28 00:10:42,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:42,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:10:42,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894040951] [2020-10-28 00:10:42,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:10:42,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:42,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:10:42,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:10:42,809 INFO L87 Difference]: Start difference. First operand 26038 states and 37792 transitions. Second operand 11 states. [2020-10-28 00:10:43,212 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:10:45,171 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 00:10:50,505 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 00:11:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:15,193 INFO L93 Difference]: Finished difference Result 158638 states and 227941 transitions. [2020-10-28 00:11:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 00:11:15,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-10-28 00:11:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:15,425 INFO L225 Difference]: With dead ends: 158638 [2020-10-28 00:11:15,425 INFO L226 Difference]: Without dead ends: 147506 [2020-10-28 00:11:15,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-28 00:11:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147506 states. [2020-10-28 00:11:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147506 to 26047. [2020-10-28 00:11:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26047 states. [2020-10-28 00:11:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 37801 transitions. [2020-10-28 00:11:21,104 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 37801 transitions. Word has length 64 [2020-10-28 00:11:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:21,104 INFO L481 AbstractCegarLoop]: Abstraction has 26047 states and 37801 transitions. [2020-10-28 00:11:21,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:11:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 37801 transitions. [2020-10-28 00:11:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:11:21,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:21,110 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] [2020-10-28 00:11:21,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:11:21,110 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1686294679, now seen corresponding path program 1 times [2020-10-28 00:11:21,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:21,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338462253] [2020-10-28 00:11:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:21,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:22,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:24,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:24,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:26,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:26,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:26,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 00:11:26,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:11:26,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:11:26,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:26,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:26,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:11:26,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:11:26,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:26,352 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 00:11:26,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:26,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:26,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:26,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:26,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:26,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:11:26,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:26,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:26,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:26,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:26,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:11:26,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338462253] [2020-10-28 00:11:26,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:26,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:26,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380881423] [2020-10-28 00:11:26,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:26,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:26,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:26,388 INFO L87 Difference]: Start difference. First operand 26047 states and 37801 transitions. Second operand 4 states. [2020-10-28 00:11:27,466 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 00:11:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:30,967 INFO L93 Difference]: Finished difference Result 30450 states and 44117 transitions. [2020-10-28 00:11:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:30,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 00:11:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:30,988 INFO L225 Difference]: With dead ends: 30450 [2020-10-28 00:11:30,988 INFO L226 Difference]: Without dead ends: 21005 [2020-10-28 00:11:31,001 INFO L677 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 [2020-10-28 00:11:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21005 states. [2020-10-28 00:11:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21005 to 21002. [2020-10-28 00:11:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21002 states. [2020-10-28 00:11:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21002 states to 21002 states and 29975 transitions. [2020-10-28 00:11:34,661 INFO L78 Accepts]: Start accepts. Automaton has 21002 states and 29975 transitions. Word has length 65 [2020-10-28 00:11:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:34,661 INFO L481 AbstractCegarLoop]: Abstraction has 21002 states and 29975 transitions. [2020-10-28 00:11:34,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21002 states and 29975 transitions. [2020-10-28 00:11:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 00:11:34,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:34,666 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] [2020-10-28 00:11:34,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:11:34,666 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:34,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1084197282, now seen corresponding path program 1 times [2020-10-28 00:11:34,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:34,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147392199] [2020-10-28 00:11:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY