/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:18:50,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:18:50,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:18:50,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:18:50,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:18:50,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:18:50,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:18:50,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:18:50,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:18:50,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:18:50,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:18:50,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:18:50,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:18:50,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:18:50,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:18:50,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:18:50,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:18:50,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:18:50,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:18:50,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:18:50,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:18:50,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:18:50,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:18:50,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:18:50,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:18:50,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:18:50,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:18:50,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:18:50,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:18:50,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:18:50,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:18:50,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:18:50,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:18:50,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:18:50,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:18:50,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:18:50,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:18:50,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:18:50,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:18:50,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:18:50,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:18:50,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:18:50,489 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:18:50,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:18:50,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:18:50,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:18:50,496 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:18:50,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:18:50,496 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:18:50,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:18:50,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:18:50,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:18:50,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:18:50,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:18:50,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:18:50,499 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:18:50,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:18:50,499 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:18:50,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:18:50,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:18:50,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:18:50,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:18:50,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:18:50,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:18:50,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:18:50,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:18:50,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:18:50,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:18:50,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:18:50,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:18:50,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:18:50,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:18:50,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:18:50,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:18:50,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:18:50,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:18:50,968 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:18:50,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:18:51,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8286d3d3/cdb4a623afaa44449a24c23e27bb8518/FLAG8cecf3584 [2020-10-28 00:18:51,799 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:18:51,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:18:51,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8286d3d3/cdb4a623afaa44449a24c23e27bb8518/FLAG8cecf3584 [2020-10-28 00:18:52,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8286d3d3/cdb4a623afaa44449a24c23e27bb8518 [2020-10-28 00:18:52,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:18:52,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:18:52,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:18:52,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:18:52,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:18:52,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:18:52" (1/1) ... [2020-10-28 00:18:52,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1793e543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52, skipping insertion in model container [2020-10-28 00:18:52,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:18:52" (1/1) ... [2020-10-28 00:18:52,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:18:52,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:18:52,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:18:52,546 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:18:52,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:18:52,848 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:18:52,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52 WrapperNode [2020-10-28 00:18:52,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:18:52,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:18:52,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:18:52,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:18:52,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52" (1/1) ... [2020-10-28 00:18:52,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52" (1/1) ... [2020-10-28 00:18:52,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52" (1/1) ... [2020-10-28 00:18:52,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52" (1/1) ... [2020-10-28 00:18:52,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52" (1/1) ... [2020-10-28 00:18:52,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52" (1/1) ... [2020-10-28 00:18:52,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52" (1/1) ... [2020-10-28 00:18:52,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:18:52,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:18:52,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:18:52,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:18:52,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:18:53,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:18:53,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:18:53,043 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:18:53,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:18:53,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:18:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:18:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:18:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:18:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:18:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:18:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:18:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:18:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:18:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:18:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:18:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:18:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:18:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:18:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:18:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:18:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:18:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:18:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:18:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:18:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:18:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:18:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:18:53,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:18:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:18:53,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:18:54,299 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:18:54,300 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:18:54,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:54 BoogieIcfgContainer [2020-10-28 00:18:54,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:18:54,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:18:54,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:18:54,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:18:54,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:18:52" (1/3) ... [2020-10-28 00:18:54,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1fd4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:54, skipping insertion in model container [2020-10-28 00:18:54,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:52" (2/3) ... [2020-10-28 00:18:54,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1fd4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:54, skipping insertion in model container [2020-10-28 00:18:54,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:54" (3/3) ... [2020-10-28 00:18:54,313 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:18:54,328 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:18:54,333 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:18:54,346 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:18:54,377 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:18:54,377 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:18:54,377 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:18:54,378 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:18:54,378 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:18:54,378 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:18:54,378 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:18:54,378 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:18:54,406 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-10-28 00:18:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:18:54,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:54,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:54,419 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:54,426 INFO L82 PathProgramCache]: Analyzing trace with hash 115916313, now seen corresponding path program 1 times [2020-10-28 00:18:54,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:54,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565410684] [2020-10-28 00:18:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:55,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:55,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:59,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:59,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:18:59,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:18:59,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 00:18:59,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 00:18:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:18:59,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:19:00,275 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:00,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:00,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:00,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:00,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:00,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:00,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:19:00,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:00,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:00,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:00,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:00,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:00,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565410684] [2020-10-28 00:19:00,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:00,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:00,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402444902] [2020-10-28 00:19:00,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:00,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:00,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:00,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:00,369 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2020-10-28 00:19:00,703 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-28 00:19:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:01,740 INFO L93 Difference]: Finished difference Result 430 states and 702 transitions. [2020-10-28 00:19:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:01,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-28 00:19:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:01,758 INFO L225 Difference]: With dead ends: 430 [2020-10-28 00:19:01,758 INFO L226 Difference]: Without dead ends: 320 [2020-10-28 00:19:01,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-28 00:19:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2020-10-28 00:19:01,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-28 00:19:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 473 transitions. [2020-10-28 00:19:01,871 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 473 transitions. Word has length 84 [2020-10-28 00:19:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:01,874 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 473 transitions. [2020-10-28 00:19:01,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 473 transitions. [2020-10-28 00:19:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:19:01,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:01,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:01,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:19:01,885 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash -216084163, now seen corresponding path program 1 times [2020-10-28 00:19:01,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:01,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076419342] [2020-10-28 00:19:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:02,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:02,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:03,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:03,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:19:03,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:19:03,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-28 00:19:03,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:03,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:19:03,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 00:19:03,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:19:03,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:19:03,712 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:03,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:03,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:03,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:03,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:03,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:03,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 00:19:03,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:03,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:03,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:03,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:03,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:03,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076419342] [2020-10-28 00:19:03,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:03,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:19:03,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006199599] [2020-10-28 00:19:03,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:19:03,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:03,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:19:03,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:03,795 INFO L87 Difference]: Start difference. First operand 317 states and 473 transitions. Second operand 5 states. [2020-10-28 00:19:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:04,771 INFO L93 Difference]: Finished difference Result 490 states and 746 transitions. [2020-10-28 00:19:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:19:04,772 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-28 00:19:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:04,777 INFO L225 Difference]: With dead ends: 490 [2020-10-28 00:19:04,778 INFO L226 Difference]: Without dead ends: 487 [2020-10-28 00:19:04,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-10-28 00:19:04,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 319. [2020-10-28 00:19:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-28 00:19:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 475 transitions. [2020-10-28 00:19:04,813 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 475 transitions. Word has length 85 [2020-10-28 00:19:04,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:04,814 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 475 transitions. [2020-10-28 00:19:04,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:19:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 475 transitions. [2020-10-28 00:19:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 00:19:04,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:04,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:04,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:19:04,817 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:04,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1371480579, now seen corresponding path program 1 times [2020-10-28 00:19:04,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:04,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682681877] [2020-10-28 00:19:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:04,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:04,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:06,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:06,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 00:19:06,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:19:06,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1904 [2020-10-28 00:19:06,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:19:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:19:06,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:19:06,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:07,179 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:07,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:07,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:07,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:07,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:07,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:07,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:19:07,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:07,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:07,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:07,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:07,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:07,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682681877] [2020-10-28 00:19:07,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:07,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:19:07,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093369441] [2020-10-28 00:19:07,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:19:07,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:07,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:19:07,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:19:07,274 INFO L87 Difference]: Start difference. First operand 319 states and 475 transitions. Second operand 8 states. [2020-10-28 00:19:08,492 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 00:19:08,740 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:19:09,001 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 00:19:09,282 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 00:19:09,564 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 00:19:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:10,215 INFO L93 Difference]: Finished difference Result 1380 states and 2128 transitions. [2020-10-28 00:19:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:19:10,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-28 00:19:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:10,223 INFO L225 Difference]: With dead ends: 1380 [2020-10-28 00:19:10,223 INFO L226 Difference]: Without dead ends: 1141 [2020-10-28 00:19:10,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:19:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2020-10-28 00:19:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1129. [2020-10-28 00:19:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1129 states. [2020-10-28 00:19:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1736 transitions. [2020-10-28 00:19:10,308 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1736 transitions. Word has length 86 [2020-10-28 00:19:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:10,309 INFO L481 AbstractCegarLoop]: Abstraction has 1129 states and 1736 transitions. [2020-10-28 00:19:10,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:19:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1736 transitions. [2020-10-28 00:19:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 00:19:10,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:10,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:10,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:19:10,313 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:10,314 INFO L82 PathProgramCache]: Analyzing trace with hash 57797233, now seen corresponding path program 1 times [2020-10-28 00:19:10,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:10,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077675919] [2020-10-28 00:19:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:10,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:10,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:11,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:11,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 00:19:11,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:19:11,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-28 00:19:11,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:11,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:19:11,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:19:11,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 00:19:11,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:11,400 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:11,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:11,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:11,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:11,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:11,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:11,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:19:11,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:11,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:11,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:11,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:11,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:11,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077675919] [2020-10-28 00:19:11,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:11,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:19:11,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136856839] [2020-10-28 00:19:11,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:19:11,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:19:11,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:11,473 INFO L87 Difference]: Start difference. First operand 1129 states and 1736 transitions. Second operand 5 states. [2020-10-28 00:19:11,764 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 00:19:12,559 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-28 00:19:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:13,111 INFO L93 Difference]: Finished difference Result 2590 states and 4039 transitions. [2020-10-28 00:19:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 00:19:13,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-28 00:19:13,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:13,129 INFO L225 Difference]: With dead ends: 2590 [2020-10-28 00:19:13,129 INFO L226 Difference]: Without dead ends: 1827 [2020-10-28 00:19:13,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:19:13,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2020-10-28 00:19:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1814. [2020-10-28 00:19:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1814 states. [2020-10-28 00:19:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2803 transitions. [2020-10-28 00:19:13,297 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2803 transitions. Word has length 87 [2020-10-28 00:19:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:13,298 INFO L481 AbstractCegarLoop]: Abstraction has 1814 states and 2803 transitions. [2020-10-28 00:19:13,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:19:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2803 transitions. [2020-10-28 00:19:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 00:19:13,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:13,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:13,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:19:13,308 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1661924368, now seen corresponding path program 1 times [2020-10-28 00:19:13,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:13,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645727659] [2020-10-28 00:19:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:13,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:13,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:13,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:14,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:14,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:16,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:18,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:18,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 00:19:18,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:19:18,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 00:19:18,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:18,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:18,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:19:18,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:19:18,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:18,588 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:18,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:18,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:18,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:18,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:18,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:18,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 00:19:18,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:18,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:18,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:18,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645727659] [2020-10-28 00:19:18,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:18,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:18,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843165357] [2020-10-28 00:19:18,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:18,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:18,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:18,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:18,687 INFO L87 Difference]: Start difference. First operand 1814 states and 2803 transitions. Second operand 4 states. [2020-10-28 00:19:18,894 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:19:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:19,793 INFO L93 Difference]: Finished difference Result 3727 states and 5805 transitions. [2020-10-28 00:19:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:19,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-28 00:19:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:19,809 INFO L225 Difference]: With dead ends: 3727 [2020-10-28 00:19:19,809 INFO L226 Difference]: Without dead ends: 2747 [2020-10-28 00:19:19,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2020-10-28 00:19:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2734. [2020-10-28 00:19:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2734 states. [2020-10-28 00:19:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 4197 transitions. [2020-10-28 00:19:19,989 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 4197 transitions. Word has length 88 [2020-10-28 00:19:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:19,989 INFO L481 AbstractCegarLoop]: Abstraction has 2734 states and 4197 transitions. [2020-10-28 00:19:19,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 4197 transitions. [2020-10-28 00:19:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 00:19:19,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:19,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:19,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:19:19,993 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:19,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:19,993 INFO L82 PathProgramCache]: Analyzing trace with hash -615068937, now seen corresponding path program 1 times [2020-10-28 00:19:19,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:19,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999848201] [2020-10-28 00:19:19,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:20,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:20,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:20,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:20,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:21,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:21,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:24,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:25,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:25,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 00:19:25,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:19:25,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:19:25,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-28 00:19:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:19:25,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:25,315 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:25,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:25,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:25,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:25,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:25,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:19:25,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:25,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:25,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:19:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:25,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999848201] [2020-10-28 00:19:25,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:25,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:25,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924050345] [2020-10-28 00:19:25,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:25,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:25,375 INFO L87 Difference]: Start difference. First operand 2734 states and 4197 transitions. Second operand 4 states. [2020-10-28 00:19:25,694 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:19:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:26,719 INFO L93 Difference]: Finished difference Result 3932 states and 6045 transitions. [2020-10-28 00:19:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:26,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-28 00:19:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:26,738 INFO L225 Difference]: With dead ends: 3932 [2020-10-28 00:19:26,738 INFO L226 Difference]: Without dead ends: 3291 [2020-10-28 00:19:26,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2020-10-28 00:19:26,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3288. [2020-10-28 00:19:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3288 states. [2020-10-28 00:19:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 4997 transitions. [2020-10-28 00:19:26,963 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 4997 transitions. Word has length 88 [2020-10-28 00:19:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:26,964 INFO L481 AbstractCegarLoop]: Abstraction has 3288 states and 4997 transitions. [2020-10-28 00:19:26,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 4997 transitions. [2020-10-28 00:19:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 00:19:26,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:26,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:26,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:19:26,967 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:26,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:26,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1404603470, now seen corresponding path program 1 times [2020-10-28 00:19:26,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:26,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651310724] [2020-10-28 00:19:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:27,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:27,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:27,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:27,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:27,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:29,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:29,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 00:19:29,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:29,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2881 [2020-10-28 00:19:29,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:19:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:19:29,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:19:29,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:30,118 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:30,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:30,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:30,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:30,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:30,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:30,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:19:30,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:30,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:30,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:30,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:30,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:30,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651310724] [2020-10-28 00:19:30,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:30,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:19:30,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134415811] [2020-10-28 00:19:30,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:19:30,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:30,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:19:30,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:30,170 INFO L87 Difference]: Start difference. First operand 3288 states and 4997 transitions. Second operand 6 states. [2020-10-28 00:19:31,082 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:19:31,996 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:19:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:32,401 INFO L93 Difference]: Finished difference Result 17751 states and 26814 transitions. [2020-10-28 00:19:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:19:32,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-28 00:19:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:32,481 INFO L225 Difference]: With dead ends: 17751 [2020-10-28 00:19:32,482 INFO L226 Difference]: Without dead ends: 14920 [2020-10-28 00:19:32,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:19:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14920 states. [2020-10-28 00:19:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14920 to 3491. [2020-10-28 00:19:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3491 states. [2020-10-28 00:19:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5238 transitions. [2020-10-28 00:19:32,953 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5238 transitions. Word has length 88 [2020-10-28 00:19:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:32,954 INFO L481 AbstractCegarLoop]: Abstraction has 3491 states and 5238 transitions. [2020-10-28 00:19:32,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:19:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5238 transitions. [2020-10-28 00:19:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 00:19:32,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:32,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:32,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:19:32,958 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1856114674, now seen corresponding path program 1 times [2020-10-28 00:19:32,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:32,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364012679] [2020-10-28 00:19:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:33,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:33,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:33,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:33,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:37,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:37,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 00:19:37,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:19:37,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:19:37,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:37,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:37,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 00:19:37,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:19:37,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:38,223 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:38,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:38,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:38,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:38,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:38,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:38,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:19:38,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:38,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:38,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:38,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:38,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:38,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364012679] [2020-10-28 00:19:38,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:38,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:38,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551044602] [2020-10-28 00:19:38,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:38,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:38,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:38,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:38,268 INFO L87 Difference]: Start difference. First operand 3491 states and 5238 transitions. Second operand 4 states. [2020-10-28 00:19:38,522 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:19:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:39,637 INFO L93 Difference]: Finished difference Result 8544 states and 12868 transitions. [2020-10-28 00:19:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:39,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-28 00:19:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:39,654 INFO L225 Difference]: With dead ends: 8544 [2020-10-28 00:19:39,654 INFO L226 Difference]: Without dead ends: 5782 [2020-10-28 00:19:39,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:39,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5782 states. [2020-10-28 00:19:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5782 to 5771. [2020-10-28 00:19:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5771 states. [2020-10-28 00:19:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5771 states to 5771 states and 8548 transitions. [2020-10-28 00:19:40,105 INFO L78 Accepts]: Start accepts. Automaton has 5771 states and 8548 transitions. Word has length 88 [2020-10-28 00:19:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:40,105 INFO L481 AbstractCegarLoop]: Abstraction has 5771 states and 8548 transitions. [2020-10-28 00:19:40,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5771 states and 8548 transitions. [2020-10-28 00:19:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 00:19:40,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:40,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:40,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:19:40,111 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:40,112 INFO L82 PathProgramCache]: Analyzing trace with hash -355801168, now seen corresponding path program 1 times [2020-10-28 00:19:40,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:40,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32094808] [2020-10-28 00:19:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:40,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:40,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:40,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:40,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:40,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:42,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:45,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:45,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 00:19:45,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:19:45,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:19:45,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:45,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:45,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 00:19:45,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:19:45,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:45,354 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:45,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:45,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:45,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:45,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:45,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:45,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:19:45,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:45,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:45,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:45,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:45,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:45,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32094808] [2020-10-28 00:19:45,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:45,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:45,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767277001] [2020-10-28 00:19:45,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:45,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:45,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:45,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:45,392 INFO L87 Difference]: Start difference. First operand 5771 states and 8548 transitions. Second operand 4 states. [2020-10-28 00:19:45,607 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:19:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:46,940 INFO L93 Difference]: Finished difference Result 15351 states and 22828 transitions. [2020-10-28 00:19:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:19:46,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-28 00:19:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:46,972 INFO L225 Difference]: With dead ends: 15351 [2020-10-28 00:19:46,972 INFO L226 Difference]: Without dead ends: 10327 [2020-10-28 00:19:46,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:19:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10327 states. [2020-10-28 00:19:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10327 to 10324. [2020-10-28 00:19:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10324 states. [2020-10-28 00:19:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10324 states to 10324 states and 15174 transitions. [2020-10-28 00:19:47,711 INFO L78 Accepts]: Start accepts. Automaton has 10324 states and 15174 transitions. Word has length 88 [2020-10-28 00:19:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:47,711 INFO L481 AbstractCegarLoop]: Abstraction has 10324 states and 15174 transitions. [2020-10-28 00:19:47,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:19:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 10324 states and 15174 transitions. [2020-10-28 00:19:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 00:19:47,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:47,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:47,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:19:47,719 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:47,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:47,720 INFO L82 PathProgramCache]: Analyzing trace with hash 233621510, now seen corresponding path program 1 times [2020-10-28 00:19:47,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:47,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509555989] [2020-10-28 00:19:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:47,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:47,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:47,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:48,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:48,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:50,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:50,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 00:19:50,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:50,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2587 [2020-10-28 00:19:50,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:50,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:19:50,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:19:50,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 00:19:50,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:50,560 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:50,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:50,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:50,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:50,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:50,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:50,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:19:50,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:50,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:50,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509555989] [2020-10-28 00:19:50,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:50,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:19:50,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836110717] [2020-10-28 00:19:50,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:19:50,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:50,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:19:50,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:50,598 INFO L87 Difference]: Start difference. First operand 10324 states and 15174 transitions. Second operand 6 states. [2020-10-28 00:19:51,688 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:19:53,189 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:19:54,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:54,106 INFO L93 Difference]: Finished difference Result 43453 states and 63681 transitions. [2020-10-28 00:19:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:19:54,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-28 00:19:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:54,198 INFO L225 Difference]: With dead ends: 43453 [2020-10-28 00:19:54,198 INFO L226 Difference]: Without dead ends: 34828 [2020-10-28 00:19:54,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:19:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34828 states. [2020-10-28 00:19:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34828 to 18812. [2020-10-28 00:19:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18812 states. [2020-10-28 00:19:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18812 states to 18812 states and 27214 transitions. [2020-10-28 00:19:55,990 INFO L78 Accepts]: Start accepts. Automaton has 18812 states and 27214 transitions. Word has length 88 [2020-10-28 00:19:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:55,990 INFO L481 AbstractCegarLoop]: Abstraction has 18812 states and 27214 transitions. [2020-10-28 00:19:55,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:19:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 18812 states and 27214 transitions. [2020-10-28 00:19:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 00:19:56,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:56,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:56,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:19:56,001 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash 859063009, now seen corresponding path program 1 times [2020-10-28 00:19:56,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:56,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374569270] [2020-10-28 00:19:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:56,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:56,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:56,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:56,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:58,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:58,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 00:19:58,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:58,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2710 [2020-10-28 00:19:58,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:58,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:19:58,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:19:58,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:19:58,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:58,960 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:19:58,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:58,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:58,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:58,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:58,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:58,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:19:58,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:58,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:58,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374569270] [2020-10-28 00:19:58,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:58,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:19:58,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976154624] [2020-10-28 00:19:58,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:19:58,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:58,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:19:58,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:19:58,991 INFO L87 Difference]: Start difference. First operand 18812 states and 27214 transitions. Second operand 6 states. [2020-10-28 00:20:00,038 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:20:02,250 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:20:06,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:06,863 INFO L93 Difference]: Finished difference Result 118700 states and 170904 transitions. [2020-10-28 00:20:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:20:06,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-28 00:20:06,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:07,160 INFO L225 Difference]: With dead ends: 118700 [2020-10-28 00:20:07,161 INFO L226 Difference]: Without dead ends: 102243 [2020-10-28 00:20:07,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:20:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102243 states. [2020-10-28 00:20:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102243 to 19603. [2020-10-28 00:20:09,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19603 states. [2020-10-28 00:20:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19603 states to 19603 states and 27975 transitions. [2020-10-28 00:20:09,367 INFO L78 Accepts]: Start accepts. Automaton has 19603 states and 27975 transitions. Word has length 88 [2020-10-28 00:20:09,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:09,367 INFO L481 AbstractCegarLoop]: Abstraction has 19603 states and 27975 transitions. [2020-10-28 00:20:09,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:20:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 19603 states and 27975 transitions. [2020-10-28 00:20:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 00:20:09,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:09,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:20:09,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:20:09,382 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1116383907, now seen corresponding path program 1 times [2020-10-28 00:20:09,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:09,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017239835] [2020-10-28 00:20:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:09,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:09,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:09,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:09,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:10,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:10,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:10,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:11,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:14,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:14,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 00:20:14,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:20:14,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:20:14,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:14,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:20:14,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 00:20:14,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:20:14,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:14,645 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:20:14,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:14,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:14,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:14,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:14,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:14,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:20:14,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:14,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:14,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:14,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:14,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:14,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017239835] [2020-10-28 00:20:14,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:14,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:20:14,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603201369] [2020-10-28 00:20:14,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:20:14,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:20:14,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:20:14,678 INFO L87 Difference]: Start difference. First operand 19603 states and 27975 transitions. Second operand 4 states. [2020-10-28 00:20:14,922 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-28 00:20:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:17,595 INFO L93 Difference]: Finished difference Result 36204 states and 51901 transitions. [2020-10-28 00:20:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:20:17,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-10-28 00:20:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:17,646 INFO L225 Difference]: With dead ends: 36204 [2020-10-28 00:20:17,646 INFO L226 Difference]: Without dead ends: 25081 [2020-10-28 00:20:17,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:20:17,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25081 states. [2020-10-28 00:20:19,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25081 to 25007. [2020-10-28 00:20:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25007 states. [2020-10-28 00:20:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25007 states to 25007 states and 35226 transitions. [2020-10-28 00:20:19,702 INFO L78 Accepts]: Start accepts. Automaton has 25007 states and 35226 transitions. Word has length 88 [2020-10-28 00:20:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:19,702 INFO L481 AbstractCegarLoop]: Abstraction has 25007 states and 35226 transitions. [2020-10-28 00:20:19,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:20:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 25007 states and 35226 transitions. [2020-10-28 00:20:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 00:20:19,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:19,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:20:19,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:20:19,715 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:19,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1440124460, now seen corresponding path program 1 times [2020-10-28 00:20:19,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:19,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242262758] [2020-10-28 00:20:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:19,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:19,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:19,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:20,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:20,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:22,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:22,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 00:20:22,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:20:22,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2584 [2020-10-28 00:20:22,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:22,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:20:22,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:20:22,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:20:22,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:22,567 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:20:22,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:22,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:22,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:22,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:22,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:22,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:20:22,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:22,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:22,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:22,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:22,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:22,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242262758] [2020-10-28 00:20:22,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:22,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:20:22,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419126337] [2020-10-28 00:20:22,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:20:22,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:22,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:20:22,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:20:22,601 INFO L87 Difference]: Start difference. First operand 25007 states and 35226 transitions. Second operand 6 states. [2020-10-28 00:20:23,916 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:20:26,317 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:20:31,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:31,817 INFO L93 Difference]: Finished difference Result 121014 states and 170899 transitions. [2020-10-28 00:20:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:20:31,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-28 00:20:31,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:31,989 INFO L225 Difference]: With dead ends: 121014 [2020-10-28 00:20:31,989 INFO L226 Difference]: Without dead ends: 99365 [2020-10-28 00:20:32,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:20:32,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99365 states. [2020-10-28 00:20:34,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99365 to 25145. [2020-10-28 00:20:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25145 states. [2020-10-28 00:20:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25145 states to 25145 states and 35204 transitions. [2020-10-28 00:20:35,001 INFO L78 Accepts]: Start accepts. Automaton has 25145 states and 35204 transitions. Word has length 88 [2020-10-28 00:20:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:35,001 INFO L481 AbstractCegarLoop]: Abstraction has 25145 states and 35204 transitions. [2020-10-28 00:20:35,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:20:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 25145 states and 35204 transitions. [2020-10-28 00:20:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:20:35,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:35,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:20:35,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:20:35,016 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash 504311028, now seen corresponding path program 1 times [2020-10-28 00:20:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:35,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056154200] [2020-10-28 00:20:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:35,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:35,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:35,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:35,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:35,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:35,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:35,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:36,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:36,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:36,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:38,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:40,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:40,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:20:40,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:20:40,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:20:40,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:40,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:20:40,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:20:40,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:20:40,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:40,491 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:20:40,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:40,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:40,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:40,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:40,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:40,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:20:40,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:40,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:40,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:40,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:40,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:40,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056154200] [2020-10-28 00:20:40,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:40,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:20:40,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483906584] [2020-10-28 00:20:40,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:20:40,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:20:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:20:40,535 INFO L87 Difference]: Start difference. First operand 25145 states and 35204 transitions. Second operand 11 states. [2020-10-28 00:20:40,837 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 00:20:43,279 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:20:47,096 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:20:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:50,679 INFO L93 Difference]: Finished difference Result 95224 states and 132688 transitions. [2020-10-28 00:20:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 00:20:50,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-10-28 00:20:50,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:50,774 INFO L225 Difference]: With dead ends: 95224 [2020-10-28 00:20:50,774 INFO L226 Difference]: Without dead ends: 80525 [2020-10-28 00:20:50,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 00:20:50,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80525 states. [2020-10-28 00:20:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80525 to 26127. [2020-10-28 00:20:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26127 states. [2020-10-28 00:20:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26127 states to 26127 states and 36494 transitions. [2020-10-28 00:20:53,605 INFO L78 Accepts]: Start accepts. Automaton has 26127 states and 36494 transitions. Word has length 89 [2020-10-28 00:20:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:53,606 INFO L481 AbstractCegarLoop]: Abstraction has 26127 states and 36494 transitions. [2020-10-28 00:20:53,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:20:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 26127 states and 36494 transitions. [2020-10-28 00:20:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:20:53,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:53,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:20:53,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:20:53,616 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:53,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:53,617 INFO L82 PathProgramCache]: Analyzing trace with hash -292716593, now seen corresponding path program 1 times [2020-10-28 00:20:53,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:53,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155411775] [2020-10-28 00:20:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:53,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:53,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:53,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:54,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:54,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:54,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:55,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:55,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:55,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:55,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:58,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:58,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:20:58,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:20:58,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:20:58,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:58,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:20:58,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:20:58,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:20:58,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:59,059 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:20:59,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:59,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:59,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:59,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:59,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:59,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:20:59,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:59,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:59,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:59,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:59,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:59,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155411775] [2020-10-28 00:20:59,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:59,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:20:59,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539030119] [2020-10-28 00:20:59,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:20:59,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:59,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:20:59,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:20:59,099 INFO L87 Difference]: Start difference. First operand 26127 states and 36494 transitions. Second operand 11 states. [2020-10-28 00:20:59,366 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:21:02,348 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-28 00:21:09,525 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:21:22,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:21:22,236 INFO L93 Difference]: Finished difference Result 194566 states and 270980 transitions. [2020-10-28 00:21:22,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:21:22,237 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-10-28 00:21:22,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:21:22,532 INFO L225 Difference]: With dead ends: 194566 [2020-10-28 00:21:22,532 INFO L226 Difference]: Without dead ends: 176511 [2020-10-28 00:21:22,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:21:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176511 states. [2020-10-28 00:21:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176511 to 28000. [2020-10-28 00:21:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28000 states. [2020-10-28 00:21:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28000 states to 28000 states and 39045 transitions. [2020-10-28 00:21:26,546 INFO L78 Accepts]: Start accepts. Automaton has 28000 states and 39045 transitions. Word has length 89 [2020-10-28 00:21:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:21:26,546 INFO L481 AbstractCegarLoop]: Abstraction has 28000 states and 39045 transitions. [2020-10-28 00:21:26,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:21:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 28000 states and 39045 transitions. [2020-10-28 00:21:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:21:26,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:21:26,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:21:26,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:21:26,562 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:21:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:21:26,562 INFO L82 PathProgramCache]: Analyzing trace with hash 2025554477, now seen corresponding path program 1 times [2020-10-28 00:21:26,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:21:26,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331657467] [2020-10-28 00:21:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:21:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:26,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:26,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:26,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:27,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:27,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:27,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:27,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:28,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:28,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:28,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:29,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:31,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:31,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:31,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:21:31,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:21:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:21:31,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:21:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:21:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 00:21:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:31,993 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:21:31,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:21:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:32,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:32,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:32,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:21:32,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:21:32,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:21:32,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:32,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:21:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:21:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:21:32,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:21:32,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331657467] [2020-10-28 00:21:32,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:21:32,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:21:32,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657471602] [2020-10-28 00:21:32,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:21:32,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:21:32,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:21:32,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:21:32,025 INFO L87 Difference]: Start difference. First operand 28000 states and 39045 transitions. Second operand 11 states. [2020-10-28 00:21:32,300 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 00:21:35,781 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-28 00:21:47,188 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 00:22:07,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:07,725 INFO L93 Difference]: Finished difference Result 264137 states and 368731 transitions. [2020-10-28 00:22:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 00:22:07,726 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-10-28 00:22:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:08,175 INFO L225 Difference]: With dead ends: 264137 [2020-10-28 00:22:08,175 INFO L226 Difference]: Without dead ends: 244047 [2020-10-28 00:22:08,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 00:22:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244047 states. [2020-10-28 00:22:13,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244047 to 30337. [2020-10-28 00:22:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30337 states. [2020-10-28 00:22:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30337 states to 30337 states and 42197 transitions. [2020-10-28 00:22:13,650 INFO L78 Accepts]: Start accepts. Automaton has 30337 states and 42197 transitions. Word has length 89 [2020-10-28 00:22:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:13,650 INFO L481 AbstractCegarLoop]: Abstraction has 30337 states and 42197 transitions. [2020-10-28 00:22:13,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:22:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 30337 states and 42197 transitions. [2020-10-28 00:22:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 00:22:13,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:13,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:22:13,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:22:13,668 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:13,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1208195840, now seen corresponding path program 1 times [2020-10-28 00:22:13,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:13,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256044612] [2020-10-28 00:22:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:13,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:13,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:13,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:13,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:13,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:17,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:17,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 00:22:17,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:22:17,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3497 [2020-10-28 00:22:17,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:17,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:22:17,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:22:17,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:22:17,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:17,429 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 00:22:17,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:17,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:17,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:17,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:17,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:17,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:22:17,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:17,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:17,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:17,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:17,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:17,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256044612] [2020-10-28 00:22:17,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:17,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:22:17,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621373497] [2020-10-28 00:22:17,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:22:17,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:22:17,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:22:17,462 INFO L87 Difference]: Start difference. First operand 30337 states and 42197 transitions. Second operand 6 states. [2020-10-28 00:22:19,554 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 00:22:20,171 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 176