/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 12:59:35,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 12:59:35,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 12:59:35,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 12:59:35,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 12:59:35,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 12:59:35,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 12:59:35,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 12:59:35,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 12:59:35,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 12:59:35,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 12:59:35,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 12:59:35,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 12:59:35,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 12:59:35,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 12:59:35,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 12:59:35,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 12:59:35,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 12:59:35,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 12:59:35,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 12:59:35,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 12:59:35,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 12:59:35,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 12:59:35,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 12:59:35,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 12:59:35,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 12:59:35,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 12:59:35,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 12:59:35,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 12:59:35,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 12:59:35,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 12:59:35,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 12:59:35,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 12:59:35,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 12:59:35,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 12:59:35,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 12:59:35,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 12:59:35,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 12:59:35,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 12:59:35,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 12:59:35,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 12:59:35,694 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 [2020-10-29 12:59:35,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 12:59:35,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 12:59:35,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 12:59:35,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 12:59:35,765 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 12:59:35,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 12:59:35,766 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 12:59:35,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 12:59:35,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 12:59:35,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 12:59:35,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 12:59:35,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 12:59:35,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 12:59:35,767 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 12:59:35,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 12:59:35,770 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 12:59:35,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 12:59:35,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 12:59:35,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 12:59:35,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 12:59:35,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 12:59:35,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 12:59:35,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 12:59:35,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 12:59:35,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 12:59:35,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 12:59:35,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 12:59:35,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 12:59:35,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 12:59:35,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 12:59:36,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 12:59:36,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 12:59:36,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 12:59:36,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 12:59:36,285 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 12:59:36,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 12:59:36,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec192a2c2/a8407523f75d4c00b8a04fc00499f508/FLAG63519214f [2020-10-29 12:59:37,126 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 12:59:37,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 12:59:37,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec192a2c2/a8407523f75d4c00b8a04fc00499f508/FLAG63519214f [2020-10-29 12:59:37,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec192a2c2/a8407523f75d4c00b8a04fc00499f508 [2020-10-29 12:59:37,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 12:59:37,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 12:59:37,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 12:59:37,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 12:59:37,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 12:59:37,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:59:37" (1/1) ... [2020-10-29 12:59:37,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec93ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:37, skipping insertion in model container [2020-10-29 12:59:37,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:59:37" (1/1) ... [2020-10-29 12:59:37,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 12:59:37,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 12:59:37,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:59:37,895 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 12:59:38,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:59:38,078 INFO L208 MainTranslator]: Completed translation [2020-10-29 12:59:38,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:38 WrapperNode [2020-10-29 12:59:38,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 12:59:38,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 12:59:38,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 12:59:38,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 12:59:38,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:38" (1/1) ... [2020-10-29 12:59:38,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:38" (1/1) ... [2020-10-29 12:59:38,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:38" (1/1) ... [2020-10-29 12:59:38,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:38" (1/1) ... [2020-10-29 12:59:38,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:38" (1/1) ... [2020-10-29 12:59:38,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:38" (1/1) ... [2020-10-29 12:59:38,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:38" (1/1) ... [2020-10-29 12:59:38,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 12:59:38,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 12:59:38,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 12:59:38,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 12:59:38,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:38" (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 [2020-10-29 12:59:38,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 12:59:38,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 12:59:38,255 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 12:59:38,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 12:59:38,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 12:59:38,255 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 12:59:38,256 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 12:59:38,256 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 12:59:38,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 12:59:38,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 12:59:38,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 12:59:38,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 12:59:38,257 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 12:59:38,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 12:59:38,257 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 12:59:38,257 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 12:59:38,257 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 12:59:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 12:59:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 12:59:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 12:59:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 12:59:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 12:59:38,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 12:59:38,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 12:59:38,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 12:59:38,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 12:59:38,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 12:59:38,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 12:59:39,255 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 12:59:39,255 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 12:59:39,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:59:39 BoogieIcfgContainer [2020-10-29 12:59:39,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 12:59:39,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 12:59:39,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 12:59:39,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 12:59:39,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 12:59:37" (1/3) ... [2020-10-29 12:59:39,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ff1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:59:39, skipping insertion in model container [2020-10-29 12:59:39,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:59:38" (2/3) ... [2020-10-29 12:59:39,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ff1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:59:39, skipping insertion in model container [2020-10-29 12:59:39,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:59:39" (3/3) ... [2020-10-29 12:59:39,275 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 12:59:39,290 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 12:59:39,296 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 12:59:39,311 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 12:59:39,361 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 12:59:39,361 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 12:59:39,361 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 12:59:39,362 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 12:59:39,362 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 12:59:39,362 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 12:59:39,362 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 12:59:39,362 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 12:59:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-10-29 12:59:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 12:59:39,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:59:39,411 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] [2020-10-29 12:59:39,412 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:59:39,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:59:39,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1542310197, now seen corresponding path program 1 times [2020-10-29 12:59:39,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:59:39,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038915191] [2020-10-29 12:59:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:59:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:59:39,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:39,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:40,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:40,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:43,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:59:43,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 12:59:43,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 12:59:43,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3910 [2020-10-29 12:59:43,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:59:43,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:59:43,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 12:59:43,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 12:59:43,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 12:59:43,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 12:59:44,098 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 12:59:44,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:59:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:59:44,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:44,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:59:44,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:59:44,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:59:44,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 12:59:44,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:59:44,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:59:44,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:59:44,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:59:44,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:59:44,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:59:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 12:59:44,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038915191] [2020-10-29 12:59:44,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:59:44,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 12:59:44,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731987724] [2020-10-29 12:59:44,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 12:59:44,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:59:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 12:59:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 12:59:44,222 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 4 states. [2020-10-29 12:59:44,639 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 12:59:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:59:45,457 INFO L93 Difference]: Finished difference Result 318 states and 531 transitions. [2020-10-29 12:59:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 12:59:45,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-29 12:59:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:59:45,478 INFO L225 Difference]: With dead ends: 318 [2020-10-29 12:59:45,479 INFO L226 Difference]: Without dead ends: 219 [2020-10-29 12:59:45,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:59:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-29 12:59:45,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2020-10-29 12:59:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-29 12:59:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 340 transitions. [2020-10-29 12:59:45,553 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 340 transitions. Word has length 61 [2020-10-29 12:59:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:59:45,553 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 340 transitions. [2020-10-29 12:59:45,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 12:59:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 340 transitions. [2020-10-29 12:59:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 12:59:45,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:59:45,557 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] [2020-10-29 12:59:45,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 12:59:45,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:59:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:59:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash -182129794, now seen corresponding path program 1 times [2020-10-29 12:59:45,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:59:45,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434270873] [2020-10-29 12:59:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:59:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:59:45,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:45,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:45,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:46,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:47,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:50,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:59:50,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 12:59:50,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 12:59:50,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-29 12:59:50,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:59:50,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:59:50,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:59:50,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 12:59:50,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 12:59:50,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 12:59:51,107 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 12:59:51,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:59:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:59:51,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:51,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:59:51,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:59:51,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:59:51,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 12:59:51,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:59:51,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:59:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:59:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:59:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:59:51,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:59:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 12:59:51,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434270873] [2020-10-29 12:59:51,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:59:51,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:59:51,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878114078] [2020-10-29 12:59:51,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:59:51,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:59:51,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:59:51,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:59:51,191 INFO L87 Difference]: Start difference. First operand 215 states and 340 transitions. Second operand 5 states. [2020-10-29 12:59:52,167 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 12:59:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:59:52,308 INFO L93 Difference]: Finished difference Result 559 states and 900 transitions. [2020-10-29 12:59:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:59:52,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-29 12:59:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:59:52,316 INFO L225 Difference]: With dead ends: 559 [2020-10-29 12:59:52,318 INFO L226 Difference]: Without dead ends: 402 [2020-10-29 12:59:52,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:59:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-29 12:59:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 399. [2020-10-29 12:59:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-29 12:59:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 630 transitions. [2020-10-29 12:59:52,402 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 630 transitions. Word has length 63 [2020-10-29 12:59:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:59:52,402 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 630 transitions. [2020-10-29 12:59:52,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:59:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 630 transitions. [2020-10-29 12:59:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 12:59:52,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:59:52,406 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] [2020-10-29 12:59:52,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 12:59:52,407 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:59:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:59:52,407 INFO L82 PathProgramCache]: Analyzing trace with hash -404459319, now seen corresponding path program 1 times [2020-10-29 12:59:52,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:59:52,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943603318] [2020-10-29 12:59:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:59:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:59:52,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:52,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:52,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:52,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:53,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:54,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:56,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:59:56,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 12:59:56,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 12:59:56,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4538 [2020-10-29 12:59:56,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:59:56,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:59:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:59:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 12:59:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 12:59:56,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:59:57,305 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 12:59:57,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:59:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:59:57,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:57,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:59:57,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:59:57,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:59:57,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 12:59:57,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:59:57,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:59:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:59:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:59:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:59:57,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:59:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 12:59:57,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943603318] [2020-10-29 12:59:57,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:59:57,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 12:59:57,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767712764] [2020-10-29 12:59:57,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 12:59:57,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:59:57,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 12:59:57,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 12:59:57,363 INFO L87 Difference]: Start difference. First operand 399 states and 630 transitions. Second operand 5 states. [2020-10-29 12:59:58,467 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 12:59:58,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:59:58,638 INFO L93 Difference]: Finished difference Result 1068 states and 1718 transitions. [2020-10-29 12:59:58,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:59:58,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-29 12:59:58,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:59:58,648 INFO L225 Difference]: With dead ends: 1068 [2020-10-29 12:59:58,648 INFO L226 Difference]: Without dead ends: 767 [2020-10-29 12:59:58,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 12:59:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-10-29 12:59:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 764. [2020-10-29 12:59:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-10-29 12:59:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1202 transitions. [2020-10-29 12:59:58,772 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1202 transitions. Word has length 64 [2020-10-29 12:59:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:59:58,772 INFO L481 AbstractCegarLoop]: Abstraction has 764 states and 1202 transitions. [2020-10-29 12:59:58,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 12:59:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1202 transitions. [2020-10-29 12:59:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 12:59:58,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:59:58,787 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] [2020-10-29 12:59:58,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 12:59:58,788 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:59:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:59:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash 59908075, now seen corresponding path program 1 times [2020-10-29 12:59:58,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:59:58,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304572909] [2020-10-29 12:59:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:59:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:59:58,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:58,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:58,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:59,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:59:59,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:00,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:03,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:03,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:00:03,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:00:03,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:00:03,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:03,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:00:03,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:00:03,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:00:03,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:00:04,197 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:00:04,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:00:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:04,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:04,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:04,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:00:04,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:00:04,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:00:04,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:04,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:04,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:00:04,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:00:04,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:00:04,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:00:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:00:04,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304572909] [2020-10-29 13:00:04,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:00:04,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:00:04,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499128419] [2020-10-29 13:00:04,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:00:04,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:00:04,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:00:04,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:00:04,263 INFO L87 Difference]: Start difference. First operand 764 states and 1202 transitions. Second operand 5 states. [2020-10-29 13:00:05,302 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:00:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:00:05,464 INFO L93 Difference]: Finished difference Result 2184 states and 3432 transitions. [2020-10-29 13:00:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:00:05,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-29 13:00:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:00:05,473 INFO L225 Difference]: With dead ends: 2184 [2020-10-29 13:00:05,473 INFO L226 Difference]: Without dead ends: 1461 [2020-10-29 13:00:05,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:00:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2020-10-29 13:00:05,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1458. [2020-10-29 13:00:05,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1458 states. [2020-10-29 13:00:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2280 transitions. [2020-10-29 13:00:05,627 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2280 transitions. Word has length 65 [2020-10-29 13:00:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:00:05,628 INFO L481 AbstractCegarLoop]: Abstraction has 1458 states and 2280 transitions. [2020-10-29 13:00:05,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:00:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2280 transitions. [2020-10-29 13:00:05,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:00:05,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:00:05,633 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] [2020-10-29 13:00:05,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:00:05,633 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:00:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:00:05,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1924082947, now seen corresponding path program 1 times [2020-10-29 13:00:05,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:00:05,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258204867] [2020-10-29 13:00:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:00:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:05,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:05,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:05,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:05,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:07,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:10,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:10,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:00:10,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:00:10,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4981 [2020-10-29 13:00:10,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:10,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:00:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 13:00:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 13:00:10,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:00:10,964 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:00:10,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:00:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:10,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:10,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:10,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:00:10,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:00:10,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:00:10,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:10,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:10,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:00:10,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:00:10,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:00:10,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:00:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:00:11,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258204867] [2020-10-29 13:00:11,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:00:11,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:00:11,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804082670] [2020-10-29 13:00:11,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:00:11,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:00:11,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:00:11,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:00:11,028 INFO L87 Difference]: Start difference. First operand 1458 states and 2280 transitions. Second operand 4 states. [2020-10-29 13:00:11,348 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:00:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:00:12,270 INFO L93 Difference]: Finished difference Result 3560 states and 5772 transitions. [2020-10-29 13:00:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:00:12,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-29 13:00:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:00:12,287 INFO L225 Difference]: With dead ends: 3560 [2020-10-29 13:00:12,287 INFO L226 Difference]: Without dead ends: 2441 [2020-10-29 13:00:12,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:00:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2020-10-29 13:00:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2422. [2020-10-29 13:00:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2422 states. [2020-10-29 13:00:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 3788 transitions. [2020-10-29 13:00:12,569 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 3788 transitions. Word has length 65 [2020-10-29 13:00:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:00:12,570 INFO L481 AbstractCegarLoop]: Abstraction has 2422 states and 3788 transitions. [2020-10-29 13:00:12,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:00:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 3788 transitions. [2020-10-29 13:00:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:00:12,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:00:12,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:00:12,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:00:12,575 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:00:12,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:00:12,576 INFO L82 PathProgramCache]: Analyzing trace with hash -860681396, now seen corresponding path program 1 times [2020-10-29 13:00:12,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:00:12,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277699748] [2020-10-29 13:00:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:00:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:12,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:12,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:12,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:12,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:13,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:13,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:14,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:17,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:17,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:00:17,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:00:17,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:00:17,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:17,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:17,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:00:17,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:00:17,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:00:17,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:00:17,988 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:00:17,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:00:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:18,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:18,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:18,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:00:18,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:00:18,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:00:18,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:18,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:18,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:00:18,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:00:18,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:00:18,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:00:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:00:18,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277699748] [2020-10-29 13:00:18,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:00:18,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:00:18,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795759083] [2020-10-29 13:00:18,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:00:18,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:00:18,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:00:18,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:00:18,054 INFO L87 Difference]: Start difference. First operand 2422 states and 3788 transitions. Second operand 5 states. [2020-10-29 13:00:19,390 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:00:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:00:19,726 INFO L93 Difference]: Finished difference Result 7037 states and 10999 transitions. [2020-10-29 13:00:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:00:19,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-29 13:00:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:00:19,751 INFO L225 Difference]: With dead ends: 7037 [2020-10-29 13:00:19,751 INFO L226 Difference]: Without dead ends: 4666 [2020-10-29 13:00:19,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:00:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2020-10-29 13:00:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4663. [2020-10-29 13:00:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4663 states. [2020-10-29 13:00:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 7221 transitions. [2020-10-29 13:00:20,298 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 7221 transitions. Word has length 68 [2020-10-29 13:00:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:00:20,298 INFO L481 AbstractCegarLoop]: Abstraction has 4663 states and 7221 transitions. [2020-10-29 13:00:20,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:00:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 7221 transitions. [2020-10-29 13:00:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:00:20,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:00:20,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:00:20,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:00:20,306 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:00:20,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:00:20,307 INFO L82 PathProgramCache]: Analyzing trace with hash -890166691, now seen corresponding path program 1 times [2020-10-29 13:00:20,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:00:20,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723505386] [2020-10-29 13:00:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:00:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:20,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:20,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:20,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:20,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:21,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:22,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:25,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:25,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:00:25,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:00:25,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:00:25,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:25,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:00:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:00:25,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:00:25,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:00:25,659 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:00:25,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:00:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:25,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:25,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:00:25,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:00:25,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:00:25,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:25,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:00:25,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:00:25,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:00:25,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:00:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:00:25,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723505386] [2020-10-29 13:00:25,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:00:25,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:00:25,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263026082] [2020-10-29 13:00:25,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:00:25,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:00:25,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:00:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:00:25,712 INFO L87 Difference]: Start difference. First operand 4663 states and 7221 transitions. Second operand 5 states. [2020-10-29 13:00:27,040 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:00:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:00:27,577 INFO L93 Difference]: Finished difference Result 13520 states and 20919 transitions. [2020-10-29 13:00:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:00:27,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-29 13:00:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:00:27,624 INFO L225 Difference]: With dead ends: 13520 [2020-10-29 13:00:27,624 INFO L226 Difference]: Without dead ends: 8923 [2020-10-29 13:00:27,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:00:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8923 states. [2020-10-29 13:00:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8923 to 8920. [2020-10-29 13:00:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8920 states. [2020-10-29 13:00:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8920 states to 8920 states and 13691 transitions. [2020-10-29 13:00:28,531 INFO L78 Accepts]: Start accepts. Automaton has 8920 states and 13691 transitions. Word has length 69 [2020-10-29 13:00:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:00:28,532 INFO L481 AbstractCegarLoop]: Abstraction has 8920 states and 13691 transitions. [2020-10-29 13:00:28,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:00:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 8920 states and 13691 transitions. [2020-10-29 13:00:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:00:28,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:00:28,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:00:28,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:00:28,545 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:00:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:00:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash -691170705, now seen corresponding path program 1 times [2020-10-29 13:00:28,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:00:28,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381924160] [2020-10-29 13:00:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:00:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:28,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:28,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:28,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:28,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:28,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:32,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:33,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:33,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:00:33,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:00:33,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-29 13:00:33,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:33,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:33,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:00:33,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-29 13:00:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 13:00:33,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:00:33,914 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:00:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:00:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:33,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:33,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:33,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:00:33,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:00:33,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:00:33,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:33,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:33,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:00:33,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:00:33,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:00:33,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:00:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:00:33,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381924160] [2020-10-29 13:00:33,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:00:33,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:00:33,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083839347] [2020-10-29 13:00:33,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:00:33,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:00:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:00:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:00:33,958 INFO L87 Difference]: Start difference. First operand 8920 states and 13691 transitions. Second operand 4 states. [2020-10-29 13:00:34,261 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:00:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:00:36,061 INFO L93 Difference]: Finished difference Result 23582 states and 37055 transitions. [2020-10-29 13:00:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:00:36,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-29 13:00:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:00:36,130 INFO L225 Difference]: With dead ends: 23582 [2020-10-29 13:00:36,130 INFO L226 Difference]: Without dead ends: 15867 [2020-10-29 13:00:36,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:00:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15867 states. [2020-10-29 13:00:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15867 to 15736. [2020-10-29 13:00:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15736 states. [2020-10-29 13:00:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15736 states to 15736 states and 24347 transitions. [2020-10-29 13:00:37,407 INFO L78 Accepts]: Start accepts. Automaton has 15736 states and 24347 transitions. Word has length 69 [2020-10-29 13:00:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:00:37,407 INFO L481 AbstractCegarLoop]: Abstraction has 15736 states and 24347 transitions. [2020-10-29 13:00:37,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:00:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 15736 states and 24347 transitions. [2020-10-29 13:00:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:00:37,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:00:37,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:00:37,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:00:37,422 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:00:37,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:00:37,423 INFO L82 PathProgramCache]: Analyzing trace with hash -67326824, now seen corresponding path program 1 times [2020-10-29 13:00:37,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:00:37,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740131807] [2020-10-29 13:00:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:00:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:37,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:37,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:37,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:37,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:37,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:40,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:42,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:42,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:00:42,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:00:42,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:00:42,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:42,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:42,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:00:42,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:00:42,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:00:42,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:00:42,783 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:00:42,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:00:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:42,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:42,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:42,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:00:42,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:00:42,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:00:42,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:42,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:42,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:00:42,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:00:42,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:00:42,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:00:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:00:42,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740131807] [2020-10-29 13:00:42,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:00:42,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:00:42,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123802349] [2020-10-29 13:00:42,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:00:42,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:00:42,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:00:42,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:00:42,821 INFO L87 Difference]: Start difference. First operand 15736 states and 24347 transitions. Second operand 5 states. [2020-10-29 13:00:44,588 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:00:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:00:46,235 INFO L93 Difference]: Finished difference Result 45532 states and 70567 transitions. [2020-10-29 13:00:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:00:46,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-29 13:00:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:00:46,325 INFO L225 Difference]: With dead ends: 45532 [2020-10-29 13:00:46,325 INFO L226 Difference]: Without dead ends: 30217 [2020-10-29 13:00:46,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:00:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30217 states. [2020-10-29 13:00:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30217 to 30214. [2020-10-29 13:00:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30214 states. [2020-10-29 13:00:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30214 states to 30214 states and 46347 transitions. [2020-10-29 13:00:49,137 INFO L78 Accepts]: Start accepts. Automaton has 30214 states and 46347 transitions. Word has length 72 [2020-10-29 13:00:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:00:49,137 INFO L481 AbstractCegarLoop]: Abstraction has 30214 states and 46347 transitions. [2020-10-29 13:00:49,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:00:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30214 states and 46347 transitions. [2020-10-29 13:00:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:00:49,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:00:49,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:00:49,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:00:49,160 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:00:49,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:00:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash -809078903, now seen corresponding path program 1 times [2020-10-29 13:00:49,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:00:49,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233645143] [2020-10-29 13:00:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:00:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:49,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:49,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:49,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:49,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:53,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:54,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:54,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:00:54,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:00:54,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:00:54,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:54,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:54,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:00:54,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:00:54,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 13:00:54,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:00:54,485 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:00:54,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:00:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:54,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:54,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:00:54,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:00:54,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:00:54,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:00:54,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:00:54,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:00:54,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:00:54,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:00:54,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:00:54,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:00:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:00:54,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233645143] [2020-10-29 13:00:54,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:00:54,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:00:54,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479519239] [2020-10-29 13:00:54,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:00:54,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:00:54,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:00:54,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:00:54,524 INFO L87 Difference]: Start difference. First operand 30214 states and 46347 transitions. Second operand 5 states. [2020-10-29 13:00:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:00:56,829 INFO L93 Difference]: Finished difference Result 49802 states and 76168 transitions. [2020-10-29 13:00:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:00:56,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-29 13:00:56,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:00:56,877 INFO L225 Difference]: With dead ends: 49802 [2020-10-29 13:00:56,878 INFO L226 Difference]: Without dead ends: 19627 [2020-10-29 13:00:56,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:00:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19627 states. [2020-10-29 13:00:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19627 to 19626. [2020-10-29 13:00:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19626 states. [2020-10-29 13:00:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19626 states to 19626 states and 29869 transitions. [2020-10-29 13:00:58,868 INFO L78 Accepts]: Start accepts. Automaton has 19626 states and 29869 transitions. Word has length 73 [2020-10-29 13:00:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:00:58,868 INFO L481 AbstractCegarLoop]: Abstraction has 19626 states and 29869 transitions. [2020-10-29 13:00:58,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:00:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19626 states and 29869 transitions. [2020-10-29 13:00:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:00:58,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:00:58,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:00:58,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:00:58,882 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:00:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:00:58,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1338563611, now seen corresponding path program 1 times [2020-10-29 13:00:58,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:00:58,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803533094] [2020-10-29 13:00:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:00:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:00:58,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:58,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:58,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:59,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:00:59,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:02,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:03,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:03,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:01:03,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:01:03,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:01:03,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:03,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:01:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:01:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 13:01:03,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:04,191 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:01:04,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:01:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:04,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:04,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:04,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:01:04,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:01:04,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:01:04,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:04,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:04,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:01:04,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:01:04,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:01:04,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:01:04,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803533094] [2020-10-29 13:01:04,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:01:04,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:01:04,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416484140] [2020-10-29 13:01:04,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:01:04,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:01:04,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:01:04,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:01:04,231 INFO L87 Difference]: Start difference. First operand 19626 states and 29869 transitions. Second operand 5 states. [2020-10-29 13:01:06,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:01:06,077 INFO L93 Difference]: Finished difference Result 30937 states and 47296 transitions. [2020-10-29 13:01:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:01:06,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-29 13:01:06,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:01:06,114 INFO L225 Difference]: With dead ends: 30937 [2020-10-29 13:01:06,115 INFO L226 Difference]: Without dead ends: 16014 [2020-10-29 13:01:06,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:01:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16014 states. [2020-10-29 13:01:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16014 to 16011. [2020-10-29 13:01:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16011 states. [2020-10-29 13:01:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16011 states to 16011 states and 24275 transitions. [2020-10-29 13:01:07,694 INFO L78 Accepts]: Start accepts. Automaton has 16011 states and 24275 transitions. Word has length 73 [2020-10-29 13:01:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:01:07,694 INFO L481 AbstractCegarLoop]: Abstraction has 16011 states and 24275 transitions. [2020-10-29 13:01:07,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:01:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 16011 states and 24275 transitions. [2020-10-29 13:01:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:01:07,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:01:07,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:01:07,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:01:07,706 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:01:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:01:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1280277916, now seen corresponding path program 1 times [2020-10-29 13:01:07,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:01:07,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734064831] [2020-10-29 13:01:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:01:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:07,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:07,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:07,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:07,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:07,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:09,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:09,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:12,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:12,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:01:12,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:01:12,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:01:12,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:12,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:01:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:01:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:01:12,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:13,009 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:01:13,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:01:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:13,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:13,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:13,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:01:13,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:01:13,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:01:13,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:13,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:13,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:01:13,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:01:13,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:01:13,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:01:13,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734064831] [2020-10-29 13:01:13,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:01:13,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:01:13,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109915987] [2020-10-29 13:01:13,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:01:13,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:01:13,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:01:13,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:01:13,039 INFO L87 Difference]: Start difference. First operand 16011 states and 24275 transitions. Second operand 5 states. [2020-10-29 13:01:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:01:14,796 INFO L93 Difference]: Finished difference Result 28905 states and 43857 transitions. [2020-10-29 13:01:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:01:14,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-29 13:01:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:01:14,818 INFO L225 Difference]: With dead ends: 28905 [2020-10-29 13:01:14,819 INFO L226 Difference]: Without dead ends: 13205 [2020-10-29 13:01:14,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:01:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13205 states. [2020-10-29 13:01:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13205 to 13204. [2020-10-29 13:01:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13204 states. [2020-10-29 13:01:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13204 states to 13204 states and 19952 transitions. [2020-10-29 13:01:15,961 INFO L78 Accepts]: Start accepts. Automaton has 13204 states and 19952 transitions. Word has length 75 [2020-10-29 13:01:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:01:15,961 INFO L481 AbstractCegarLoop]: Abstraction has 13204 states and 19952 transitions. [2020-10-29 13:01:15,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:01:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 13204 states and 19952 transitions. [2020-10-29 13:01:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:01:15,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:01:15,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:01:15,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:01:15,971 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:01:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:01:15,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1935399758, now seen corresponding path program 1 times [2020-10-29 13:01:15,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:01:15,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393850730] [2020-10-29 13:01:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:01:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:15,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:16,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:16,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:16,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:16,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:16,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:20,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:20,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:20,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:01:20,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:01:20,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:01:20,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:20,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:20,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:01:20,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:01:20,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 13:01:20,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:21,300 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:01:21,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:01:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:21,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:21,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:21,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:01:21,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:01:21,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:01:21,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:21,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:21,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:01:21,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:01:21,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:01:21,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:01:21,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393850730] [2020-10-29 13:01:21,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:01:21,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:01:21,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950800539] [2020-10-29 13:01:21,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:01:21,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:01:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:01:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:01:21,334 INFO L87 Difference]: Start difference. First operand 13204 states and 19952 transitions. Second operand 5 states. [2020-10-29 13:01:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:01:22,868 INFO L93 Difference]: Finished difference Result 23906 states and 36108 transitions. [2020-10-29 13:01:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:01:22,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-29 13:01:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:01:22,883 INFO L225 Difference]: With dead ends: 23906 [2020-10-29 13:01:22,884 INFO L226 Difference]: Without dead ends: 10832 [2020-10-29 13:01:22,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:01:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10832 states. [2020-10-29 13:01:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10832 to 10832. [2020-10-29 13:01:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10832 states. [2020-10-29 13:01:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10832 states to 10832 states and 16314 transitions. [2020-10-29 13:01:23,990 INFO L78 Accepts]: Start accepts. Automaton has 10832 states and 16314 transitions. Word has length 75 [2020-10-29 13:01:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:01:23,990 INFO L481 AbstractCegarLoop]: Abstraction has 10832 states and 16314 transitions. [2020-10-29 13:01:23,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:01:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 10832 states and 16314 transitions. [2020-10-29 13:01:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:01:23,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:01:23,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:01:23,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:01:23,997 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:01:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:01:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash 260498771, now seen corresponding path program 1 times [2020-10-29 13:01:23,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:01:23,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811907967] [2020-10-29 13:01:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:01:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:24,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:24,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:24,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:24,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:24,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:29,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:29,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:01:29,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:01:29,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:01:29,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:29,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:29,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:01:29,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:01:29,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:01:29,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:29,173 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-10-29 13:01:29,409 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:01:29,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:01:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:29,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:29,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:29,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:01:29,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:01:29,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:01:29,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:29,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:01:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:01:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:01:29,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:01:29,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811907967] [2020-10-29 13:01:29,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:01:29,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:01:29,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590484299] [2020-10-29 13:01:29,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:01:29,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:01:29,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:01:29,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:01:29,454 INFO L87 Difference]: Start difference. First operand 10832 states and 16314 transitions. Second operand 8 states. [2020-10-29 13:01:29,743 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:01:30,989 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-29 13:01:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:01:32,638 INFO L93 Difference]: Finished difference Result 28211 states and 42627 transitions. [2020-10-29 13:01:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:01:32,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-29 13:01:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:01:32,663 INFO L225 Difference]: With dead ends: 28211 [2020-10-29 13:01:32,664 INFO L226 Difference]: Without dead ends: 18152 [2020-10-29 13:01:32,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:01:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18152 states. [2020-10-29 13:01:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18152 to 11437. [2020-10-29 13:01:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11437 states. [2020-10-29 13:01:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11437 states to 11437 states and 16901 transitions. [2020-10-29 13:01:33,841 INFO L78 Accepts]: Start accepts. Automaton has 11437 states and 16901 transitions. Word has length 75 [2020-10-29 13:01:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:01:33,841 INFO L481 AbstractCegarLoop]: Abstraction has 11437 states and 16901 transitions. [2020-10-29 13:01:33,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:01:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 11437 states and 16901 transitions. [2020-10-29 13:01:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:01:33,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:01:33,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:01:33,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:01:33,847 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:01:33,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:01:33,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1947637267, now seen corresponding path program 1 times [2020-10-29 13:01:33,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:01:33,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738267151] [2020-10-29 13:01:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:01:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:33,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:33,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:33,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:33,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:37,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:37,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:01:37,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:01:37,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3373 [2020-10-29 13:01:37,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:37,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:01:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-29 13:01:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:01:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:37,516 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:01:37,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:01:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:37,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:37,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:37,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:01:37,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:01:37,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:01:37,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:37,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:37,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:01:37,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:01:37,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:01:37,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:01:37,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738267151] [2020-10-29 13:01:37,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:01:37,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:01:37,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421865450] [2020-10-29 13:01:37,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:01:37,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:01:37,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:01:37,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:01:37,547 INFO L87 Difference]: Start difference. First operand 11437 states and 16901 transitions. Second operand 6 states. [2020-10-29 13:01:37,843 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:01:39,195 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:01:39,738 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:01:40,314 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:01:40,559 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:01:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:01:43,018 INFO L93 Difference]: Finished difference Result 48156 states and 73380 transitions. [2020-10-29 13:01:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:01:43,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:01:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:01:43,075 INFO L225 Difference]: With dead ends: 48156 [2020-10-29 13:01:43,076 INFO L226 Difference]: Without dead ends: 38097 [2020-10-29 13:01:43,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:01:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38097 states. [2020-10-29 13:01:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38097 to 20359. [2020-10-29 13:01:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20359 states. [2020-10-29 13:01:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20359 states to 20359 states and 30301 transitions. [2020-10-29 13:01:45,277 INFO L78 Accepts]: Start accepts. Automaton has 20359 states and 30301 transitions. Word has length 75 [2020-10-29 13:01:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:01:45,278 INFO L481 AbstractCegarLoop]: Abstraction has 20359 states and 30301 transitions. [2020-10-29 13:01:45,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:01:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 20359 states and 30301 transitions. [2020-10-29 13:01:45,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:01:45,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:01:45,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:01:45,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:01:45,286 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:01:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:01:45,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1663025126, now seen corresponding path program 1 times [2020-10-29 13:01:45,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:01:45,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360145780] [2020-10-29 13:01:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:01:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:45,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:45,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:45,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:45,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:46,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:46,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:50,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:50,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:01:50,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:01:50,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:01:50,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:50,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:50,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:01:50,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-29 13:01:50,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:01:50,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:50,549 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:01:50,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:01:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:50,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:50,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:01:50,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:01:50,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:01:50,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:01:50,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:01:50,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:01:50,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:01:50,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:01:50,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:01:50,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:01:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:01:50,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360145780] [2020-10-29 13:01:50,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:01:50,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:01:50,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222324385] [2020-10-29 13:01:50,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:01:50,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:01:50,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:01:50,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:01:50,595 INFO L87 Difference]: Start difference. First operand 20359 states and 30301 transitions. Second operand 5 states. [2020-10-29 13:01:50,849 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:01:52,542 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:01:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:01:55,612 INFO L93 Difference]: Finished difference Result 58634 states and 88921 transitions. [2020-10-29 13:01:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:01:55,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-29 13:01:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:01:55,667 INFO L225 Difference]: With dead ends: 58634 [2020-10-29 13:01:55,668 INFO L226 Difference]: Without dead ends: 39774 [2020-10-29 13:01:55,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:01:55,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39774 states. [2020-10-29 13:01:58,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39774 to 29977. [2020-10-29 13:01:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29977 states. [2020-10-29 13:01:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29977 states to 29977 states and 44859 transitions. [2020-10-29 13:01:59,025 INFO L78 Accepts]: Start accepts. Automaton has 29977 states and 44859 transitions. Word has length 76 [2020-10-29 13:01:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:01:59,026 INFO L481 AbstractCegarLoop]: Abstraction has 29977 states and 44859 transitions. [2020-10-29 13:01:59,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:01:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 29977 states and 44859 transitions. [2020-10-29 13:01:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:01:59,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:01:59,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:01:59,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:01:59,038 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:01:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:01:59,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2132657917, now seen corresponding path program 1 times [2020-10-29 13:01:59,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:01:59,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307495592] [2020-10-29 13:01:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:01:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:01:59,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:59,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:59,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:59,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:01:59,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:01,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:04,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:02:04,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:02:04,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:02:04,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:02:04,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:02:04,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:02:04,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:02:04,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 13:02:04,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:02:04,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:02:04,372 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:02:04,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:02:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:02:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:04,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:02:04,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:02:04,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:02:04,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:02:04,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:02:04,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:02:04,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:02:04,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:02:04,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:02:04,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:02:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:02:04,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307495592] [2020-10-29 13:02:04,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:02:04,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:02:04,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505488193] [2020-10-29 13:02:04,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:02:04,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:02:04,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:02:04,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:02:04,411 INFO L87 Difference]: Start difference. First operand 29977 states and 44859 transitions. Second operand 5 states. [2020-10-29 13:02:04,732 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:02:06,385 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-29 13:02:06,810 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:02:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:02:10,950 INFO L93 Difference]: Finished difference Result 59890 states and 90345 transitions. [2020-10-29 13:02:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:02:10,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-29 13:02:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:02:11,017 INFO L225 Difference]: With dead ends: 59890 [2020-10-29 13:02:11,018 INFO L226 Difference]: Without dead ends: 43731 [2020-10-29 13:02:11,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:02:11,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43731 states. [2020-10-29 13:02:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43731 to 43515. [2020-10-29 13:02:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43515 states. [2020-10-29 13:02:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43515 states to 43515 states and 64847 transitions. [2020-10-29 13:02:16,261 INFO L78 Accepts]: Start accepts. Automaton has 43515 states and 64847 transitions. Word has length 76 [2020-10-29 13:02:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:02:16,261 INFO L481 AbstractCegarLoop]: Abstraction has 43515 states and 64847 transitions. [2020-10-29 13:02:16,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:02:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 43515 states and 64847 transitions. [2020-10-29 13:02:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:02:16,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:02:16,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:02:16,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:02:16,272 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:02:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:02:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash -545908755, now seen corresponding path program 1 times [2020-10-29 13:02:16,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:02:16,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178681495] [2020-10-29 13:02:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:02:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:02:16,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:16,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:16,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:16,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:16,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:19,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:21,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:02:21,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:02:21,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:02:21,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:02:21,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:02:21,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:02:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:02:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 13:02:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:02:21,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:02:21,584 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:02:21,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:02:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:02:21,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:21,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:02:21,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:02:21,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:02:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:02:21,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:02:21,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:02:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:02:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:02:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:02:21,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:02:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:02:21,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178681495] [2020-10-29 13:02:21,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:02:21,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:02:21,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113104269] [2020-10-29 13:02:21,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:02:21,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:02:21,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:02:21,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:02:21,612 INFO L87 Difference]: Start difference. First operand 43515 states and 64847 transitions. Second operand 5 states. [2020-10-29 13:02:21,911 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:02:23,338 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-29 13:02:23,764 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:02:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:02:29,584 INFO L93 Difference]: Finished difference Result 86966 states and 130909 transitions. [2020-10-29 13:02:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:02:29,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-29 13:02:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:02:29,667 INFO L225 Difference]: With dead ends: 86966 [2020-10-29 13:02:29,667 INFO L226 Difference]: Without dead ends: 56460 [2020-10-29 13:02:29,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:02:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56460 states. [2020-10-29 13:02:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56460 to 56244. [2020-10-29 13:02:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56244 states. [2020-10-29 13:02:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56244 states to 56244 states and 82798 transitions. [2020-10-29 13:02:36,449 INFO L78 Accepts]: Start accepts. Automaton has 56244 states and 82798 transitions. Word has length 76 [2020-10-29 13:02:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:02:36,449 INFO L481 AbstractCegarLoop]: Abstraction has 56244 states and 82798 transitions. [2020-10-29 13:02:36,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:02:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 56244 states and 82798 transitions. [2020-10-29 13:02:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:02:36,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:02:36,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:02:36,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:02:36,454 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:02:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:02:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1783110900, now seen corresponding path program 1 times [2020-10-29 13:02:36,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:02:36,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477408613] [2020-10-29 13:02:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:02:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:02:36,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:36,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:36,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:36,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:37,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:41,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:02:41,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:02:41,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:02:41,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:02:41,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:02:41,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:02:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:02:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-29 13:02:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:02:41,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:02:41,760 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:02:41,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:02:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:02:41,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:02:41,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:02:41,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:02:41,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:02:41,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:02:41,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:02:41,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:02:41,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:02:41,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:02:41,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:02:41,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:02:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:02:41,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477408613] [2020-10-29 13:02:41,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:02:41,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:02:41,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172076413] [2020-10-29 13:02:41,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:02:41,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:02:41,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:02:41,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:02:41,814 INFO L87 Difference]: Start difference. First operand 56244 states and 82798 transitions. Second operand 5 states. [2020-10-29 13:02:42,102 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:02:46,963 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:02:53,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:02:53,484 INFO L93 Difference]: Finished difference Result 146841 states and 217882 transitions. [2020-10-29 13:02:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:02:53,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-29 13:02:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:02:53,791 INFO L225 Difference]: With dead ends: 146841 [2020-10-29 13:02:53,791 INFO L226 Difference]: Without dead ends: 91954 [2020-10-29 13:02:53,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:02:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91954 states. [2020-10-29 13:03:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91954 to 73823. [2020-10-29 13:03:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73823 states. [2020-10-29 13:03:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73823 states to 73823 states and 108384 transitions. [2020-10-29 13:03:03,233 INFO L78 Accepts]: Start accepts. Automaton has 73823 states and 108384 transitions. Word has length 77 [2020-10-29 13:03:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:03:03,233 INFO L481 AbstractCegarLoop]: Abstraction has 73823 states and 108384 transitions. [2020-10-29 13:03:03,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:03:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 73823 states and 108384 transitions. [2020-10-29 13:03:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:03:03,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:03:03,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:03:03,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:03:03,239 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:03:03,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:03:03,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1069503885, now seen corresponding path program 1 times [2020-10-29 13:03:03,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:03:03,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788035375] [2020-10-29 13:03:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:03:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:03:03,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:03,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:03,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:03,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:04,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:04,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:08,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:03:08,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:03:08,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:03:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:03:08,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:03:08,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:03:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:03:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-29 13:03:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:03:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:03:08,522 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:03:08,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:03:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:03:08,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:03:08,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:03:08,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:03:08,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:03:08,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:03:08,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:03:08,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:03:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:03:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:03:08,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:03:08,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:03:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:03:08,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788035375] [2020-10-29 13:03:08,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:03:08,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:03:08,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960632504] [2020-10-29 13:03:08,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:03:08,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:03:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:03:08,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:03:08,555 INFO L87 Difference]: Start difference. First operand 73823 states and 108384 transitions. Second operand 5 states. [2020-10-29 13:03:08,838 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:03:10,246 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186