/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:26:41,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:26:41,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:26:41,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:26:41,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:26:41,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:26:41,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:26:41,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:26:41,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:26:41,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:26:41,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:26:41,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:26:41,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:26:41,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:26:41,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:26:41,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:26:41,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:26:41,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:26:41,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:26:41,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:26:41,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:26:41,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:26:41,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:26:41,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:26:41,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:26:41,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:26:41,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:26:41,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:26:41,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:26:41,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:26:41,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:26:41,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:26:41,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:26:41,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:26:41,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:26:41,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:26:41,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:26:41,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:26:41,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:26:41,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:26:41,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:26:41,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:26:41,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:26:41,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:26:41,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:26:41,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:26:41,453 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:26:41,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:26:41,454 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:26:41,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:26:41,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:26:41,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:26:41,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:26:41,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:26:41,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:26:41,456 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:26:41,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:26:41,457 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:26:41,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:26:41,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:26:41,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:26:41,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:26:41,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:26:41,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:26:41,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:26:41,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:26:41,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:26:41,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:26:41,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:26:41,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:26:41,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:26:41,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:26:41,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:26:41,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:26:41,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:26:41,929 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:26:41,930 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:26:41,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:26:42,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f84c0b73d/6561bf6c62574188bbd79b24801c48fb/FLAGc1740e5d8 [2020-10-28 18:26:42,755 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:26:42,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:26:42,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f84c0b73d/6561bf6c62574188bbd79b24801c48fb/FLAGc1740e5d8 [2020-10-28 18:26:43,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f84c0b73d/6561bf6c62574188bbd79b24801c48fb [2020-10-28 18:26:43,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:26:43,059 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:26:43,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:26:43,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:26:43,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:26:43,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506918f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43, skipping insertion in model container [2020-10-28 18:26:43,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:26:43,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:26:43,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:26:43,442 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:26:43,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:26:43,560 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:26:43,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43 WrapperNode [2020-10-28 18:26:43,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:26:43,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:26:43,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:26:43,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:26:43,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:26:43,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:26:43,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:26:43,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:26:43,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:26:43,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:26:43,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:26:43,774 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:26:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:26:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:26:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:26:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:26:43,777 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:26:43,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:26:43,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:26:43,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:26:43,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:26:43,779 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:26:43,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:26:43,779 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:26:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:26:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:26:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:26:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:26:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:26:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:26:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:26:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:26:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:26:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:26:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:26:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:26:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:26:44,470 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:26:44,470 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:26:44,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:26:44 BoogieIcfgContainer [2020-10-28 18:26:44,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:26:44,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:26:44,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:26:44,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:26:44,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:26:43" (1/3) ... [2020-10-28 18:26:44,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7997d32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:26:44, skipping insertion in model container [2020-10-28 18:26:44,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43" (2/3) ... [2020-10-28 18:26:44,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7997d32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:26:44, skipping insertion in model container [2020-10-28 18:26:44,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:26:44" (3/3) ... [2020-10-28 18:26:44,482 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 18:26:44,495 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:26:44,500 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:26:44,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:26:44,540 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:26:44,540 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:26:44,540 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:26:44,540 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:26:44,541 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:26:44,541 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:26:44,541 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:26:44,541 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:26:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-28 18:26:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 18:26:44,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:44,570 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] [2020-10-28 18:26:44,570 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:44,577 INFO L82 PathProgramCache]: Analyzing trace with hash 238077610, now seen corresponding path program 1 times [2020-10-28 18:26:44,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:44,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759405650] [2020-10-28 18:26:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:44,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:45,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:45,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:46,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:46,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 18:26:46,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:26:46,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1710 [2020-10-28 18:26:46,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:46,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:26:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:26:46,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:26:46,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:26:46,826 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:26:46,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:46,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:46,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:46,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:46,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:46,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:26:46,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:46,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:46,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:46,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:46,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:46,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:26:46,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759405650] [2020-10-28 18:26:46,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:46,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:26:46,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975646695] [2020-10-28 18:26:46,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:26:46,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:46,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:26:46,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:26:46,978 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 4 states. [2020-10-28 18:26:47,246 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 18:26:47,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:47,646 INFO L93 Difference]: Finished difference Result 159 states and 245 transitions. [2020-10-28 18:26:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:26:47,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 18:26:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:47,660 INFO L225 Difference]: With dead ends: 159 [2020-10-28 18:26:47,660 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 18:26:47,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:26:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 18:26:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-10-28 18:26:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 18:26:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 141 transitions. [2020-10-28 18:26:47,724 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 141 transitions. Word has length 42 [2020-10-28 18:26:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:47,725 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 141 transitions. [2020-10-28 18:26:47,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:26:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 141 transitions. [2020-10-28 18:26:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 18:26:47,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:47,727 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] [2020-10-28 18:26:47,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:26:47,728 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash 599007831, now seen corresponding path program 1 times [2020-10-28 18:26:47,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:47,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206339256] [2020-10-28 18:26:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:47,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:47,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:47,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:49,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:49,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 18:26:49,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:26:49,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2102 [2020-10-28 18:26:49,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:49,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:49,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:26:49,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:26:49,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:26:49,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:26:50,090 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:26:50,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:50,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:50,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:50,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:50,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:50,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:26:50,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:50,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:50,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:50,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:50,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:50,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:26:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:26:50,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206339256] [2020-10-28 18:26:50,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:50,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:26:50,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412875934] [2020-10-28 18:26:50,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:26:50,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:50,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:26:50,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:26:50,128 INFO L87 Difference]: Start difference. First operand 98 states and 141 transitions. Second operand 4 states. [2020-10-28 18:26:50,319 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 18:26:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:50,710 INFO L93 Difference]: Finished difference Result 232 states and 351 transitions. [2020-10-28 18:26:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:26:50,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 18:26:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:50,714 INFO L225 Difference]: With dead ends: 232 [2020-10-28 18:26:50,714 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 18:26:50,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:26:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 18:26:50,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2020-10-28 18:26:50,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 18:26:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 229 transitions. [2020-10-28 18:26:50,756 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 229 transitions. Word has length 43 [2020-10-28 18:26:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:50,756 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 229 transitions. [2020-10-28 18:26:50,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:26:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 229 transitions. [2020-10-28 18:26:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 18:26:50,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:50,759 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] [2020-10-28 18:26:50,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:26:50,759 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1673593743, now seen corresponding path program 1 times [2020-10-28 18:26:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:50,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285688004] [2020-10-28 18:26:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:50,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:50,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:50,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:51,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:54,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:54,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 18:26:54,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:26:54,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3535 [2020-10-28 18:26:54,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:54,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:54,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:26:54,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:26:54,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:26:54,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:54,569 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:26:54,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:54,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:54,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:54,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:54,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:54,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:26:54,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:54,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:54,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:26:54,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:54,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:26:54,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:26:54,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285688004] [2020-10-28 18:26:54,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:54,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:26:54,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350601572] [2020-10-28 18:26:54,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:26:54,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:26:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:26:54,623 INFO L87 Difference]: Start difference. First operand 154 states and 229 transitions. Second operand 6 states. [2020-10-28 18:26:54,858 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:26:55,354 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:26:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:55,441 INFO L93 Difference]: Finished difference Result 414 states and 637 transitions. [2020-10-28 18:26:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:26:55,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-28 18:26:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:55,447 INFO L225 Difference]: With dead ends: 414 [2020-10-28 18:26:55,447 INFO L226 Difference]: Without dead ends: 283 [2020-10-28 18:26:55,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:26:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-28 18:26:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2020-10-28 18:26:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-28 18:26:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 427 transitions. [2020-10-28 18:26:55,497 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 427 transitions. Word has length 44 [2020-10-28 18:26:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:55,498 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 427 transitions. [2020-10-28 18:26:55,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:26:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 427 transitions. [2020-10-28 18:26:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 18:26:55,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:55,499 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] [2020-10-28 18:26:55,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:26:55,500 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:55,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:55,501 INFO L82 PathProgramCache]: Analyzing trace with hash -838391252, now seen corresponding path program 1 times [2020-10-28 18:26:55,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:55,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481885458] [2020-10-28 18:26:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:55,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:55,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:56,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:56,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 18:26:56,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:26:56,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-28 18:26:56,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:56,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:56,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:26:56,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:26:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:26:56,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 18:26:56,497 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:26:56,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:56,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:56,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:56,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:56,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:56,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:26:56,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:56,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:56,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:26:56,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481885458] [2020-10-28 18:26:56,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:56,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:26:56,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946061060] [2020-10-28 18:26:56,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:26:56,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:56,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:26:56,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:26:56,531 INFO L87 Difference]: Start difference. First operand 280 states and 427 transitions. Second operand 6 states. [2020-10-28 18:26:56,732 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:26:57,142 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:26:57,386 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 18:26:57,532 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-28 18:26:57,729 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 18:26:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:57,817 INFO L93 Difference]: Finished difference Result 1822 states and 2851 transitions. [2020-10-28 18:26:57,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:26:57,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-28 18:26:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:57,827 INFO L225 Difference]: With dead ends: 1822 [2020-10-28 18:26:57,827 INFO L226 Difference]: Without dead ends: 1565 [2020-10-28 18:26:57,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:26:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2020-10-28 18:26:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 534. [2020-10-28 18:26:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-10-28 18:26:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 813 transitions. [2020-10-28 18:26:57,912 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 813 transitions. Word has length 44 [2020-10-28 18:26:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:57,912 INFO L481 AbstractCegarLoop]: Abstraction has 534 states and 813 transitions. [2020-10-28 18:26:57,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:26:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 813 transitions. [2020-10-28 18:26:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 18:26:57,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:57,915 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] [2020-10-28 18:26:57,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:26:57,915 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:57,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:57,916 INFO L82 PathProgramCache]: Analyzing trace with hash -162912687, now seen corresponding path program 1 times [2020-10-28 18:26:57,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:57,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823298768] [2020-10-28 18:26:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:57,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:57,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:57,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:58,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:58,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:58,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 18:26:58,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:26:58,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-28 18:26:58,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:58,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:26:58,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:26:58,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 18:26:58,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:26:58,904 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:26:58,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:58,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:58,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:58,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:58,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:58,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:26:58,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:58,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:58,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:58,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:58,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:58,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:26:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:26:58,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823298768] [2020-10-28 18:26:58,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:58,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:26:58,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708542570] [2020-10-28 18:26:58,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:26:58,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:26:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:26:58,954 INFO L87 Difference]: Start difference. First operand 534 states and 813 transitions. Second operand 4 states. [2020-10-28 18:26:59,138 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 18:26:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:59,485 INFO L93 Difference]: Finished difference Result 1468 states and 2241 transitions. [2020-10-28 18:26:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:26:59,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-28 18:26:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:59,495 INFO L225 Difference]: With dead ends: 1468 [2020-10-28 18:26:59,495 INFO L226 Difference]: Without dead ends: 957 [2020-10-28 18:26:59,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:26:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-10-28 18:26:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 938. [2020-10-28 18:26:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-10-28 18:26:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1393 transitions. [2020-10-28 18:26:59,590 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1393 transitions. Word has length 46 [2020-10-28 18:26:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:59,590 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1393 transitions. [2020-10-28 18:26:59,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:26:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1393 transitions. [2020-10-28 18:26:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 18:26:59,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:59,603 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] [2020-10-28 18:26:59,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:26:59,605 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:59,608 INFO L82 PathProgramCache]: Analyzing trace with hash 458616946, now seen corresponding path program 1 times [2020-10-28 18:26:59,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:59,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108450499] [2020-10-28 18:26:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:59,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:59,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:00,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:00,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 18:27:00,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:27:00,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-28 18:27:00,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:00,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:27:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 18:27:00,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:00,646 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:27:00,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:00,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:00,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:00,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:00,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:00,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:27:00,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:00,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:00,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:00,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:00,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:00,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:00,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108450499] [2020-10-28 18:27:00,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:00,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:27:00,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236730828] [2020-10-28 18:27:00,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:00,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:00,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:00,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:00,690 INFO L87 Difference]: Start difference. First operand 938 states and 1393 transitions. Second operand 6 states. [2020-10-28 18:27:00,906 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 18:27:01,325 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:27:01,601 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:27:01,747 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:27:01,957 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-28 18:27:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:02,117 INFO L93 Difference]: Finished difference Result 3288 states and 4929 transitions. [2020-10-28 18:27:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:27:02,118 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-28 18:27:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:02,131 INFO L225 Difference]: With dead ends: 3288 [2020-10-28 18:27:02,132 INFO L226 Difference]: Without dead ends: 2373 [2020-10-28 18:27:02,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:27:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2020-10-28 18:27:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 938. [2020-10-28 18:27:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-10-28 18:27:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1377 transitions. [2020-10-28 18:27:02,251 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1377 transitions. Word has length 46 [2020-10-28 18:27:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:02,251 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1377 transitions. [2020-10-28 18:27:02,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1377 transitions. [2020-10-28 18:27:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 18:27:02,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:02,253 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] [2020-10-28 18:27:02,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:27:02,254 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:02,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:02,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1190079735, now seen corresponding path program 1 times [2020-10-28 18:27:02,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:02,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948449382] [2020-10-28 18:27:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:02,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:03,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:03,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:03,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 18:27:03,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:27:03,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1441 [2020-10-28 18:27:03,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:03,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:27:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:27:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 18:27:03,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:03,928 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:27:03,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:03,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:03,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:03,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:03,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:03,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:27:03,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:03,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:03,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:03,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948449382] [2020-10-28 18:27:03,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:03,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:27:03,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541926000] [2020-10-28 18:27:03,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:27:03,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:27:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:27:03,963 INFO L87 Difference]: Start difference. First operand 938 states and 1377 transitions. Second operand 5 states. [2020-10-28 18:27:04,161 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 18:27:04,537 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:27:04,693 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 18:27:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:04,976 INFO L93 Difference]: Finished difference Result 1955 states and 2919 transitions. [2020-10-28 18:27:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:27:04,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-28 18:27:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:04,986 INFO L225 Difference]: With dead ends: 1955 [2020-10-28 18:27:04,987 INFO L226 Difference]: Without dead ends: 1444 [2020-10-28 18:27:04,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:27:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2020-10-28 18:27:05,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1422. [2020-10-28 18:27:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1422 states. [2020-10-28 18:27:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 2077 transitions. [2020-10-28 18:27:05,116 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 2077 transitions. Word has length 47 [2020-10-28 18:27:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:05,116 INFO L481 AbstractCegarLoop]: Abstraction has 1422 states and 2077 transitions. [2020-10-28 18:27:05,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:27:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 2077 transitions. [2020-10-28 18:27:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 18:27:05,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:05,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:05,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:27:05,118 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:05,118 INFO L82 PathProgramCache]: Analyzing trace with hash -725211283, now seen corresponding path program 1 times [2020-10-28 18:27:05,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:05,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216664222] [2020-10-28 18:27:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:05,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:05,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:05,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:05,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:05,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:10,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:10,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 18:27:10,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:27:10,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:27:10,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:10,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:10,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:10,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:27:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 18:27:10,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:10,330 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:27:10,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:10,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:10,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:10,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:10,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:10,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:27:10,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:10,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:10,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:10,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:10,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216664222] [2020-10-28 18:27:10,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:10,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:27:10,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976243362] [2020-10-28 18:27:10,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:27:10,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:10,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:27:10,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:27:10,362 INFO L87 Difference]: Start difference. First operand 1422 states and 2077 transitions. Second operand 4 states. [2020-10-28 18:27:10,537 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 18:27:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:11,047 INFO L93 Difference]: Finished difference Result 3021 states and 4430 transitions. [2020-10-28 18:27:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:27:11,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-28 18:27:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:11,059 INFO L225 Difference]: With dead ends: 3021 [2020-10-28 18:27:11,059 INFO L226 Difference]: Without dead ends: 2099 [2020-10-28 18:27:11,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:27:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2020-10-28 18:27:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 2096. [2020-10-28 18:27:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2096 states. [2020-10-28 18:27:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 3031 transitions. [2020-10-28 18:27:11,283 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 3031 transitions. Word has length 47 [2020-10-28 18:27:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:11,283 INFO L481 AbstractCegarLoop]: Abstraction has 2096 states and 3031 transitions. [2020-10-28 18:27:11,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:27:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 3031 transitions. [2020-10-28 18:27:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 18:27:11,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:11,284 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] [2020-10-28 18:27:11,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:27:11,284 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1272920004, now seen corresponding path program 1 times [2020-10-28 18:27:11,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:11,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854941393] [2020-10-28 18:27:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:11,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:11,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:11,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:11,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 18:27:11,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:27:11,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-28 18:27:11,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:11,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:11,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:11,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:11,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:27:11,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:11,813 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:27:11,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:11,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:11,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:11,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:11,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:11,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:27:11,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:11,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:11,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:11,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854941393] [2020-10-28 18:27:11,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:11,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:27:11,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798434804] [2020-10-28 18:27:11,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:11,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:11,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:11,862 INFO L87 Difference]: Start difference. First operand 2096 states and 3031 transitions. Second operand 6 states. [2020-10-28 18:27:12,054 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:27:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:12,502 INFO L93 Difference]: Finished difference Result 4167 states and 6037 transitions. [2020-10-28 18:27:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:27:12,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-28 18:27:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:12,515 INFO L225 Difference]: With dead ends: 4167 [2020-10-28 18:27:12,515 INFO L226 Difference]: Without dead ends: 2096 [2020-10-28 18:27:12,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:27:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-10-28 18:27:12,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2096. [2020-10-28 18:27:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2096 states. [2020-10-28 18:27:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2991 transitions. [2020-10-28 18:27:12,812 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2991 transitions. Word has length 47 [2020-10-28 18:27:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:12,813 INFO L481 AbstractCegarLoop]: Abstraction has 2096 states and 2991 transitions. [2020-10-28 18:27:12,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:12,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2991 transitions. [2020-10-28 18:27:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 18:27:12,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:12,814 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] [2020-10-28 18:27:12,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:27:12,815 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:12,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1960347009, now seen corresponding path program 1 times [2020-10-28 18:27:12,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:12,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875485677] [2020-10-28 18:27:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:12,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:12,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:12,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 18:27:12,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:12,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-28 18:27:12,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:12,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:12,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:27:12,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:27:12,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:27:12,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:13,152 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:27:13,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:13,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:13,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:13,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:13,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:27:13,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:13,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:13,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:13,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:13,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:13,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:13,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875485677] [2020-10-28 18:27:13,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:13,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:27:13,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25277713] [2020-10-28 18:27:13,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:27:13,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:13,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:27:13,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:27:13,179 INFO L87 Difference]: Start difference. First operand 2096 states and 2991 transitions. Second operand 5 states. [2020-10-28 18:27:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:13,814 INFO L93 Difference]: Finished difference Result 3347 states and 4761 transitions. [2020-10-28 18:27:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:27:13,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-28 18:27:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:13,831 INFO L225 Difference]: With dead ends: 3347 [2020-10-28 18:27:13,831 INFO L226 Difference]: Without dead ends: 3344 [2020-10-28 18:27:13,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2020-10-28 18:27:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 2160. [2020-10-28 18:27:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2160 states. [2020-10-28 18:27:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 3031 transitions. [2020-10-28 18:27:14,114 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 3031 transitions. Word has length 47 [2020-10-28 18:27:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:14,115 INFO L481 AbstractCegarLoop]: Abstraction has 2160 states and 3031 transitions. [2020-10-28 18:27:14,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:27:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 3031 transitions. [2020-10-28 18:27:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:27:14,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:14,117 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:14,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:27:14,117 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:14,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1407598571, now seen corresponding path program 1 times [2020-10-28 18:27:14,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:14,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888871059] [2020-10-28 18:27:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:14,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:14,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:14,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:14,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:15,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:15,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:19,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:19,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:27:19,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:27:19,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:27:19,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:19,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 18:27:19,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:27:19,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:27:19,342 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:27:19,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:19,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:19,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:19,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:19,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:19,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:27:19,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:19,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:19,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:19,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888871059] [2020-10-28 18:27:19,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:19,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:27:19,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387148299] [2020-10-28 18:27:19,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:27:19,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:19,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:27:19,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:27:19,387 INFO L87 Difference]: Start difference. First operand 2160 states and 3031 transitions. Second operand 4 states. [2020-10-28 18:27:19,845 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:27:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:19,988 INFO L93 Difference]: Finished difference Result 3628 states and 5087 transitions. [2020-10-28 18:27:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:27:19,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 18:27:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:19,996 INFO L225 Difference]: With dead ends: 3628 [2020-10-28 18:27:19,996 INFO L226 Difference]: Without dead ends: 1493 [2020-10-28 18:27:20,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:27:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2020-10-28 18:27:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1490. [2020-10-28 18:27:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1490 states. [2020-10-28 18:27:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 2046 transitions. [2020-10-28 18:27:20,182 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 2046 transitions. Word has length 66 [2020-10-28 18:27:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:20,182 INFO L481 AbstractCegarLoop]: Abstraction has 1490 states and 2046 transitions. [2020-10-28 18:27:20,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:27:20,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 2046 transitions. [2020-10-28 18:27:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:27:20,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:20,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:20,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:27:20,184 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:20,185 INFO L82 PathProgramCache]: Analyzing trace with hash 814539395, now seen corresponding path program 1 times [2020-10-28 18:27:20,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:20,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319310405] [2020-10-28 18:27:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:25,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:25,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:27:25,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:27:25,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:27:25,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:25,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:27:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 18:27:25,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:25,429 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:27:25,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:25,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:25,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:25,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:25,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:25,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:27:25,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:25,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:25,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:27:25,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319310405] [2020-10-28 18:27:25,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:27:25,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:27:25,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373279094] [2020-10-28 18:27:25,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:25,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:25,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:25,482 INFO L87 Difference]: Start difference. First operand 1490 states and 2046 transitions. Second operand 6 states. [2020-10-28 18:27:25,731 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:27:26,170 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-28 18:27:26,359 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 18:27:26,497 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:27:26,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:26,970 INFO L93 Difference]: Finished difference Result 5975 states and 8304 transitions. [2020-10-28 18:27:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:27:26,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 18:27:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:26,997 INFO L225 Difference]: With dead ends: 5975 [2020-10-28 18:27:26,997 INFO L226 Difference]: Without dead ends: 4952 [2020-10-28 18:27:27,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:27:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4952 states. [2020-10-28 18:27:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4952 to 3244. [2020-10-28 18:27:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3244 states. [2020-10-28 18:27:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 4443 transitions. [2020-10-28 18:27:27,409 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 4443 transitions. Word has length 67 [2020-10-28 18:27:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:27,411 INFO L481 AbstractCegarLoop]: Abstraction has 3244 states and 4443 transitions. [2020-10-28 18:27:27,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 4443 transitions. [2020-10-28 18:27:27,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:27:27,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:27,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:27,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:27:27,418 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:27,419 INFO L82 PathProgramCache]: Analyzing trace with hash 78437513, now seen corresponding path program 1 times [2020-10-28 18:27:27,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:27,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499086786] [2020-10-28 18:27:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:27,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:27,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:30,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:31,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:31,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:31,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:31,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:32,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:32,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:27:32,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:27:32,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:27:32,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:32,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:27:32,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 18:27:32,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:32,630 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:27:32,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:32,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:32,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:32,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:32,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:32,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:27:32,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:32,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:32,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:32,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:32,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:32,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 18:27:32,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499086786] [2020-10-28 18:27:32,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:27:32,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:27:32,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478972920] [2020-10-28 18:27:32,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:32,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:32,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:32,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:32,672 INFO L87 Difference]: Start difference. First operand 3244 states and 4443 transitions. Second operand 6 states. [2020-10-28 18:27:32,896 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:27:33,415 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 18:27:33,581 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-28 18:27:33,766 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 18:27:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:34,501 INFO L93 Difference]: Finished difference Result 8000 states and 11022 transitions. [2020-10-28 18:27:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:27:34,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 18:27:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:34,536 INFO L225 Difference]: With dead ends: 8000 [2020-10-28 18:27:34,537 INFO L226 Difference]: Without dead ends: 6553 [2020-10-28 18:27:34,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:27:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2020-10-28 18:27:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 5002. [2020-10-28 18:27:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5002 states. [2020-10-28 18:27:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5002 states to 5002 states and 6835 transitions. [2020-10-28 18:27:35,166 INFO L78 Accepts]: Start accepts. Automaton has 5002 states and 6835 transitions. Word has length 67 [2020-10-28 18:27:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:35,166 INFO L481 AbstractCegarLoop]: Abstraction has 5002 states and 6835 transitions. [2020-10-28 18:27:35,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 5002 states and 6835 transitions. [2020-10-28 18:27:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:27:35,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:35,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:35,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:27:35,168 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1415036687, now seen corresponding path program 1 times [2020-10-28 18:27:35,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:35,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106171779] [2020-10-28 18:27:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:35,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:35,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:35,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:35,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:35,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:35,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:36,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:36,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:36,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:36,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:36,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:40,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:27:40,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:27:40,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:27:40,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:40,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:27:40,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:27:40,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 18:27:40,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:40,385 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:27:40,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:40,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:40,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:40,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:40,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:27:40,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:40,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:40,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:40,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:40,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:40,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:40,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106171779] [2020-10-28 18:27:40,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:27:40,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:27:40,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840114500] [2020-10-28 18:27:40,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:27:40,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:40,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:27:40,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:27:40,414 INFO L87 Difference]: Start difference. First operand 5002 states and 6835 transitions. Second operand 6 states. [2020-10-28 18:27:40,611 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-28 18:27:41,114 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 18:27:41,290 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-28 18:27:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:41,973 INFO L93 Difference]: Finished difference Result 8316 states and 11500 transitions. [2020-10-28 18:27:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:27:41,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 18:27:41,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:41,994 INFO L225 Difference]: With dead ends: 8316 [2020-10-28 18:27:41,994 INFO L226 Difference]: Without dead ends: 6749 [2020-10-28 18:27:42,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:27:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6749 states. [2020-10-28 18:27:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6749 to 6531. [2020-10-28 18:27:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6531 states. [2020-10-28 18:27:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6531 states to 6531 states and 9023 transitions. [2020-10-28 18:27:42,841 INFO L78 Accepts]: Start accepts. Automaton has 6531 states and 9023 transitions. Word has length 67 [2020-10-28 18:27:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:42,841 INFO L481 AbstractCegarLoop]: Abstraction has 6531 states and 9023 transitions. [2020-10-28 18:27:42,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:27:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6531 states and 9023 transitions. [2020-10-28 18:27:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:27:42,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:42,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:42,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:27:42,843 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash -212930807, now seen corresponding path program 1 times [2020-10-28 18:27:42,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:42,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884681670] [2020-10-28 18:27:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:42,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:43,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:43,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:43,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:43,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:43,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:44,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:44,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:44,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:44,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:46,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:47,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:47,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:27:47,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:27:47,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:27:47,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:47,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:27:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:27:47,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:48,323 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:27:48,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:48,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:48,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:48,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:48,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:48,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:27:48,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:48,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:48,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:48,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884681670] [2020-10-28 18:27:48,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:27:48,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 18:27:48,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545510437] [2020-10-28 18:27:48,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:27:48,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:48,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:27:48,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:27:48,391 INFO L87 Difference]: Start difference. First operand 6531 states and 9023 transitions. Second operand 13 states. [2020-10-28 18:27:48,896 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2020-10-28 18:27:49,646 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-28 18:27:49,909 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-28 18:27:51,822 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2020-10-28 18:27:52,218 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2020-10-28 18:27:52,627 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 130 [2020-10-28 18:27:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:56,316 INFO L93 Difference]: Finished difference Result 19911 states and 27195 transitions. [2020-10-28 18:27:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-28 18:27:56,316 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-10-28 18:27:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:56,358 INFO L225 Difference]: With dead ends: 19911 [2020-10-28 18:27:56,358 INFO L226 Difference]: Without dead ends: 16535 [2020-10-28 18:27:56,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=876, Invalid=3414, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 18:27:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16535 states. [2020-10-28 18:27:57,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16535 to 10381. [2020-10-28 18:27:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10381 states. [2020-10-28 18:27:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10381 states to 10381 states and 14363 transitions. [2020-10-28 18:27:57,620 INFO L78 Accepts]: Start accepts. Automaton has 10381 states and 14363 transitions. Word has length 69 [2020-10-28 18:27:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:57,620 INFO L481 AbstractCegarLoop]: Abstraction has 10381 states and 14363 transitions. [2020-10-28 18:27:57,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:27:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 10381 states and 14363 transitions. [2020-10-28 18:27:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:27:57,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:57,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:57,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:27:57,622 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1062764431, now seen corresponding path program 1 times [2020-10-28 18:27:57,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:57,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542538565] [2020-10-28 18:27:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:57,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:57,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:57,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:59,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:59,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:00,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:01,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:01,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:02,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:02,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:02,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:28:02,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:28:02,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:28:02,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:02,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:28:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:28:02,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:03,007 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:28:03,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:03,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:03,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:03,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:03,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:03,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:28:03,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:03,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:03,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:03,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542538565] [2020-10-28 18:28:03,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:28:03,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 18:28:03,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474803076] [2020-10-28 18:28:03,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:28:03,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:03,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:28:03,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:28:03,052 INFO L87 Difference]: Start difference. First operand 10381 states and 14363 transitions. Second operand 11 states. [2020-10-28 18:28:03,295 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:28:04,706 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-28 18:28:04,926 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 18:28:05,105 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 18:28:10,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:10,991 INFO L93 Difference]: Finished difference Result 55088 states and 75799 transitions. [2020-10-28 18:28:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 18:28:10,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 18:28:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:11,103 INFO L225 Difference]: With dead ends: 55088 [2020-10-28 18:28:11,103 INFO L226 Difference]: Without dead ends: 46111 [2020-10-28 18:28:11,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 18:28:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46111 states. [2020-10-28 18:28:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46111 to 24229. [2020-10-28 18:28:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24229 states. [2020-10-28 18:28:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24229 states to 24229 states and 33436 transitions. [2020-10-28 18:28:15,200 INFO L78 Accepts]: Start accepts. Automaton has 24229 states and 33436 transitions. Word has length 69 [2020-10-28 18:28:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:15,200 INFO L481 AbstractCegarLoop]: Abstraction has 24229 states and 33436 transitions. [2020-10-28 18:28:15,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:28:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 24229 states and 33436 transitions. [2020-10-28 18:28:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:28:15,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:15,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:15,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:28:15,203 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:15,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:15,204 INFO L82 PathProgramCache]: Analyzing trace with hash 947732126, now seen corresponding path program 1 times [2020-10-28 18:28:15,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:15,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800298368] [2020-10-28 18:28:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:15,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:15,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:15,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:15,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:15,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:15,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:16,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:16,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:18,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:18,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:20,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:20,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:28:20,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:28:20,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:28:20,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:20,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:20,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:28:20,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:20,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:28:20,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:20,593 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:28:20,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:20,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:20,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:20,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:20,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:20,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:28:20,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:20,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:20,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:20,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:20,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:20,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:20,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800298368] [2020-10-28 18:28:20,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:28:20,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 18:28:20,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771939063] [2020-10-28 18:28:20,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:28:20,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:20,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:28:20,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:28:20,665 INFO L87 Difference]: Start difference. First operand 24229 states and 33436 transitions. Second operand 13 states. [2020-10-28 18:28:21,014 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:28:24,050 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:28:24,345 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-28 18:28:24,605 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:28:25,196 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 18:28:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:42,693 INFO L93 Difference]: Finished difference Result 133852 states and 182860 transitions. [2020-10-28 18:28:42,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-28 18:28:42,693 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-10-28 18:28:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:42,949 INFO L225 Difference]: With dead ends: 133852 [2020-10-28 18:28:42,949 INFO L226 Difference]: Without dead ends: 109650 [2020-10-28 18:28:43,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3359 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1491, Invalid=7251, Unknown=0, NotChecked=0, Total=8742 [2020-10-28 18:28:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109650 states. [2020-10-28 18:28:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109650 to 52959. [2020-10-28 18:28:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52959 states. [2020-10-28 18:28:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52959 states to 52959 states and 72421 transitions. [2020-10-28 18:28:51,951 INFO L78 Accepts]: Start accepts. Automaton has 52959 states and 72421 transitions. Word has length 69 [2020-10-28 18:28:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:51,951 INFO L481 AbstractCegarLoop]: Abstraction has 52959 states and 72421 transitions. [2020-10-28 18:28:51,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:28:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 52959 states and 72421 transitions. [2020-10-28 18:28:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:28:51,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:51,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:51,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:28:51,954 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:51,955 INFO L82 PathProgramCache]: Analyzing trace with hash -613912440, now seen corresponding path program 1 times [2020-10-28 18:28:51,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:51,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142180850] [2020-10-28 18:28:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:51,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:52,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:52,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:52,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:55,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:55,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:28:55,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:28:55,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3933 [2020-10-28 18:28:55,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:55,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 18:28:55,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 18:28:55,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:56,078 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:28:56,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:56,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:56,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:56,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:56,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:56,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:28:56,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:56,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:56,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:28:56,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142180850] [2020-10-28 18:28:56,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:56,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:28:56,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635582217] [2020-10-28 18:28:56,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:28:56,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:28:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:28:56,105 INFO L87 Difference]: Start difference. First operand 52959 states and 72421 transitions. Second operand 4 states. [2020-10-28 18:28:56,631 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-28 18:29:03,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:03,240 INFO L93 Difference]: Finished difference Result 99866 states and 137093 transitions. [2020-10-28 18:29:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:03,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-28 18:29:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:03,346 INFO L225 Difference]: With dead ends: 99866 [2020-10-28 18:29:03,346 INFO L226 Difference]: Without dead ends: 47083 [2020-10-28 18:29:03,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47083 states. [2020-10-28 18:29:10,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47083 to 47083. [2020-10-28 18:29:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47083 states. [2020-10-28 18:29:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47083 states to 47083 states and 64234 transitions. [2020-10-28 18:29:10,646 INFO L78 Accepts]: Start accepts. Automaton has 47083 states and 64234 transitions. Word has length 70 [2020-10-28 18:29:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:10,646 INFO L481 AbstractCegarLoop]: Abstraction has 47083 states and 64234 transitions. [2020-10-28 18:29:10,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:29:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 47083 states and 64234 transitions. [2020-10-28 18:29:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:29:10,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:10,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:10,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:29:10,648 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:10,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1363560665, now seen corresponding path program 1 times [2020-10-28 18:29:10,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:10,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091657505] [2020-10-28 18:29:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:10,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:11,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:11,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:14,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:14,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:29:14,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:29:14,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3442 [2020-10-28 18:29:14,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:14,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:29:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:29:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 18:29:14,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:14,530 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:29:14,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:14,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:14,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:14,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:14,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:14,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:29:14,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:14,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:14,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:14,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:14,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:29:14,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:14,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091657505] [2020-10-28 18:29:14,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:29:14,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 18:29:14,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880518352] [2020-10-28 18:29:14,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:29:14,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:29:14,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:29:14,575 INFO L87 Difference]: Start difference. First operand 47083 states and 64234 transitions. Second operand 13 states. [2020-10-28 18:29:15,096 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 134 [2020-10-28 18:29:17,844 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 129 [2020-10-28 18:29:18,075 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:29:18,316 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-28 18:29:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:34,361 INFO L93 Difference]: Finished difference Result 105290 states and 141943 transitions. [2020-10-28 18:29:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-28 18:29:34,362 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-10-28 18:29:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:34,493 INFO L225 Difference]: With dead ends: 105290 [2020-10-28 18:29:34,494 INFO L226 Difference]: Without dead ends: 77425 [2020-10-28 18:29:34,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=978, Invalid=4278, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 18:29:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77425 states. [2020-10-28 18:29:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77425 to 46489. [2020-10-28 18:29:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46489 states. [2020-10-28 18:29:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46489 states to 46489 states and 63491 transitions. [2020-10-28 18:29:42,702 INFO L78 Accepts]: Start accepts. Automaton has 46489 states and 63491 transitions. Word has length 70 [2020-10-28 18:29:42,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:42,702 INFO L481 AbstractCegarLoop]: Abstraction has 46489 states and 63491 transitions. [2020-10-28 18:29:42,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:29:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 46489 states and 63491 transitions. [2020-10-28 18:29:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:29:42,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:42,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:42,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:29:42,704 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1276010137, now seen corresponding path program 1 times [2020-10-28 18:29:42,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:42,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975166183] [2020-10-28 18:29:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:42,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:45,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:45,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:29:45,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:29:45,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3046 [2020-10-28 18:29:45,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:45,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:45,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:45,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 18:29:45,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 18:29:45,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:45,945 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:29:45,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:45,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:45,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:45,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:45,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:45,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:29:45,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:45,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:45,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:45,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975166183] [2020-10-28 18:29:45,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:45,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:29:45,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662103067] [2020-10-28 18:29:45,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:29:45,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:29:45,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:29:45,974 INFO L87 Difference]: Start difference. First operand 46489 states and 63491 transitions. Second operand 4 states. [2020-10-28 18:29:46,909 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:29:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:49,649 INFO L93 Difference]: Finished difference Result 63231 states and 86577 transitions. [2020-10-28 18:29:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:49,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-28 18:29:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:49,672 INFO L225 Difference]: With dead ends: 63231 [2020-10-28 18:29:49,672 INFO L226 Difference]: Without dead ends: 19378 [2020-10-28 18:29:49,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19378 states. [2020-10-28 18:29:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19378 to 18940. [2020-10-28 18:29:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18940 states. [2020-10-28 18:29:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18940 states to 18940 states and 25119 transitions. [2020-10-28 18:29:53,445 INFO L78 Accepts]: Start accepts. Automaton has 18940 states and 25119 transitions. Word has length 70 [2020-10-28 18:29:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:53,445 INFO L481 AbstractCegarLoop]: Abstraction has 18940 states and 25119 transitions. [2020-10-28 18:29:53,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:29:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand 18940 states and 25119 transitions. [2020-10-28 18:29:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:29:53,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:53,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:53,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 18:29:53,447 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:53,448 INFO L82 PathProgramCache]: Analyzing trace with hash 40295317, now seen corresponding path program 1 times [2020-10-28 18:29:53,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:53,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202390143] [2020-10-28 18:29:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:53,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:56,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:29:56,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:29:56,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2767 [2020-10-28 18:29:56,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:56,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:56,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:56,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 18:29:56,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:29:56,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:56,425 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:29:56,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:56,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:56,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:56,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:56,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:29:56,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:56,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:56,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:56,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:56,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:56,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:56,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202390143] [2020-10-28 18:29:56,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:56,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:29:56,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702634960] [2020-10-28 18:29:56,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:29:56,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:29:56,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:29:56,453 INFO L87 Difference]: Start difference. First operand 18940 states and 25119 transitions. Second operand 4 states. [2020-10-28 18:29:57,200 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 18:29:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:58,929 INFO L93 Difference]: Finished difference Result 28693 states and 38279 transitions. [2020-10-28 18:29:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:58,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-28 18:29:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:58,943 INFO L225 Difference]: With dead ends: 28693 [2020-10-28 18:29:58,943 INFO L226 Difference]: Without dead ends: 11508 [2020-10-28 18:29:58,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11508 states. [2020-10-28 18:30:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11508 to 11505. [2020-10-28 18:30:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11505 states. [2020-10-28 18:30:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11505 states to 11505 states and 14977 transitions. [2020-10-28 18:30:00,735 INFO L78 Accepts]: Start accepts. Automaton has 11505 states and 14977 transitions. Word has length 70 [2020-10-28 18:30:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:00,735 INFO L481 AbstractCegarLoop]: Abstraction has 11505 states and 14977 transitions. [2020-10-28 18:30:00,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 11505 states and 14977 transitions. [2020-10-28 18:30:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:30:00,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:00,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:00,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 18:30:00,737 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash 525047704, now seen corresponding path program 1 times [2020-10-28 18:30:00,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:00,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710492869] [2020-10-28 18:30:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:00,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:00,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:00,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:01,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:01,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:04,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:04,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:30:04,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:30:04,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3972 [2020-10-28 18:30:04,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:04,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:30:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:30:04,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:05,250 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-28 18:30:05,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:05,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:05,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:05,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:05,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:05,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 18:30:05,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:05,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:05,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:05,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:05,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:05,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:05,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710492869] [2020-10-28 18:30:05,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:30:05,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 18:30:05,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113346799] [2020-10-28 18:30:05,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:30:05,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:05,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:30:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:30:05,281 INFO L87 Difference]: Start difference. First operand 11505 states and 14977 transitions. Second operand 10 states. [2020-10-28 18:30:05,593 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:30:06,951 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:30:07,684 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:30:10,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:10,200 INFO L93 Difference]: Finished difference Result 24892 states and 32591 transitions. [2020-10-28 18:30:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:30:10,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-28 18:30:10,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:10,223 INFO L225 Difference]: With dead ends: 24892 [2020-10-28 18:30:10,223 INFO L226 Difference]: Without dead ends: 16887 [2020-10-28 18:30:10,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:30:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2020-10-28 18:30:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 12121. [2020-10-28 18:30:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12121 states. [2020-10-28 18:30:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12121 states to 12121 states and 15801 transitions. [2020-10-28 18:30:12,374 INFO L78 Accepts]: Start accepts. Automaton has 12121 states and 15801 transitions. Word has length 70 [2020-10-28 18:30:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:12,375 INFO L481 AbstractCegarLoop]: Abstraction has 12121 states and 15801 transitions. [2020-10-28 18:30:12,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:30:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 12121 states and 15801 transitions. [2020-10-28 18:30:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:30:12,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:12,376 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:12,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 18:30:12,377 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1199043499, now seen corresponding path program 1 times [2020-10-28 18:30:12,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:12,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257777854] [2020-10-28 18:30:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:12,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:12,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:12,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:12,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:12,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:13,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:13,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:14,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking...