/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:25:36,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:25:36,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:25:36,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:25:36,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:25:36,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:25:36,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:25:36,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:25:36,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:25:36,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:25:36,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:25:36,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:25:36,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:25:36,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:25:36,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:25:36,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:25:36,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:25:36,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:25:36,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:25:36,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:25:36,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:25:36,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:25:36,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:25:36,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:25:36,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:25:36,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:25:36,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:25:36,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:25:36,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:25:36,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:25:36,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:25:36,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:25:36,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:25:36,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:25:36,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:25:36,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:25:36,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:25:36,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:25:36,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:25:36,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:25:36,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:25:36,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:25:36,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:25:36,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:25:36,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:25:36,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:25:36,335 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:25:36,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:25:36,336 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:25:36,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:25:36,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:25:36,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:25:36,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:25:36,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:25:36,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:25:36,339 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:25:36,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:25:36,339 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:25:36,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:25:36,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:25:36,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:25:36,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:25:36,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:25:36,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:25:36,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:25:36,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:25:36,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:25:36,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:25:36,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:25:36,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:25:36,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:25:36,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:25:36,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:25:36,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:25:36,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:25:36,861 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:25:36,862 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:25:36,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c [2020-10-29 13:25:36,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d224bc413/07a95c8bec914be085bbebae64b0d8c5/FLAGb2957ea24 [2020-10-29 13:25:37,881 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:25:37,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c [2020-10-29 13:25:37,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d224bc413/07a95c8bec914be085bbebae64b0d8c5/FLAGb2957ea24 [2020-10-29 13:25:38,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d224bc413/07a95c8bec914be085bbebae64b0d8c5 [2020-10-29 13:25:38,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:25:38,406 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:25:38,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:25:38,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:25:38,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:25:38,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:25:38" (1/1) ... [2020-10-29 13:25:38,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c905545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:38, skipping insertion in model container [2020-10-29 13:25:38,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:25:38" (1/1) ... [2020-10-29 13:25:38,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:25:38,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:25:40,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:25:40,029 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:25:40,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:25:40,611 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:25:40,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:40 WrapperNode [2020-10-29 13:25:40,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:25:40,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:25:40,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:25:40,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:25:40,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:40" (1/1) ... [2020-10-29 13:25:40,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:40" (1/1) ... [2020-10-29 13:25:40,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:40" (1/1) ... [2020-10-29 13:25:40,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:40" (1/1) ... [2020-10-29 13:25:40,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:40" (1/1) ... [2020-10-29 13:25:40,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:40" (1/1) ... [2020-10-29 13:25:40,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:40" (1/1) ... [2020-10-29 13:25:40,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:25:40,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:25:40,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:25:40,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:25:40,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:25:40,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:25:40,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:25:40,997 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:25:40,997 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:25:40,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:25:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:25:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:25:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:25:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:25:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:25:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:25:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:25:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:25:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:25:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:25:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:25:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:25:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:25:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:25:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:25:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-29 13:25:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:25:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:25:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:25:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:25:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:25:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:25:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:25:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:25:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:25:45,293 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:25:45,293 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:25:45,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:25:45 BoogieIcfgContainer [2020-10-29 13:25:45,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:25:45,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:25:45,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:25:45,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:25:45,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:25:38" (1/3) ... [2020-10-29 13:25:45,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ec5785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:25:45, skipping insertion in model container [2020-10-29 13:25:45,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:25:40" (2/3) ... [2020-10-29 13:25:45,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ec5785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:25:45, skipping insertion in model container [2020-10-29 13:25:45,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:25:45" (3/3) ... [2020-10-29 13:25:45,308 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c [2020-10-29 13:25:45,322 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:25:45,329 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:25:45,343 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:25:45,379 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:25:45,379 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:25:45,379 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:25:45,380 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:25:45,380 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:25:45,380 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:25:45,380 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:25:45,380 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:25:45,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states. [2020-10-29 13:25:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-29 13:25:45,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:45,449 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, 1, 1] [2020-10-29 13:25:45,449 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2046227063, now seen corresponding path program 1 times [2020-10-29 13:25:45,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:45,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57531057] [2020-10-29 13:25:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:46,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:46,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:47,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:47,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:47,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:49,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:49,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:49,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:50,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:50,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:51,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:51,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-29 13:25:51,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:25:51,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-29 13:25:51,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:51,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:51,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:25:51,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:25:51,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:25:51,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:25:52,930 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:25:52,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:52,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:53,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:53,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:53,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:53,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-29 13:25:53,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:53,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:53,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:25:53,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:53,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:25:53,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:25:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:53,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57531057] [2020-10-29 13:25:53,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:53,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:25:53,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39106898] [2020-10-29 13:25:53,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:25:53,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:53,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:25:53,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:25:53,187 INFO L87 Difference]: Start difference. First operand 1140 states. Second operand 6 states. [2020-10-29 13:25:55,103 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-29 13:26:05,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:05,746 INFO L93 Difference]: Finished difference Result 1707 states and 3047 transitions. [2020-10-29 13:26:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:26:05,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-29 13:26:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:05,783 INFO L225 Difference]: With dead ends: 1707 [2020-10-29 13:26:05,783 INFO L226 Difference]: Without dead ends: 952 [2020-10-29 13:26:05,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:26:05,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-10-29 13:26:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 952. [2020-10-29 13:26:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2020-10-29 13:26:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1222 transitions. [2020-10-29 13:26:05,952 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1222 transitions. Word has length 91 [2020-10-29 13:26:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:05,954 INFO L481 AbstractCegarLoop]: Abstraction has 952 states and 1222 transitions. [2020-10-29 13:26:05,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:26:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1222 transitions. [2020-10-29 13:26:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-29 13:26:05,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:05,966 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, 1, 1, 1] [2020-10-29 13:26:05,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:26:05,970 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:05,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 956990493, now seen corresponding path program 1 times [2020-10-29 13:26:05,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:05,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732049819] [2020-10-29 13:26:05,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:06,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:06,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:06,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:06,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:06,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:07,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:08,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:09,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:09,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:10,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:11,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:11,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-29 13:26:11,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:26:11,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 13:26:11,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:11,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:11,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:26:11,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:26:11,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:26:11,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:26:13,024 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:26:13,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:13,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:13,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:13,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:13,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:13,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-29 13:26:13,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:13,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:13,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:26:13,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:13,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:26:13,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:13,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732049819] [2020-10-29 13:26:13,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:13,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:26:13,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19644655] [2020-10-29 13:26:13,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:26:13,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:13,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:26:13,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:26:13,198 INFO L87 Difference]: Start difference. First operand 952 states and 1222 transitions. Second operand 6 states. [2020-10-29 13:26:15,178 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 525 [2020-10-29 13:26:22,870 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-29 13:26:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:23,685 INFO L93 Difference]: Finished difference Result 1839 states and 2486 transitions. [2020-10-29 13:26:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:26:23,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-29 13:26:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:23,697 INFO L225 Difference]: With dead ends: 1839 [2020-10-29 13:26:23,697 INFO L226 Difference]: Without dead ends: 1111 [2020-10-29 13:26:23,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:26:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2020-10-29 13:26:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1045. [2020-10-29 13:26:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1045 states. [2020-10-29 13:26:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1434 transitions. [2020-10-29 13:26:23,770 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1434 transitions. Word has length 92 [2020-10-29 13:26:23,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:23,770 INFO L481 AbstractCegarLoop]: Abstraction has 1045 states and 1434 transitions. [2020-10-29 13:26:23,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:26:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1434 transitions. [2020-10-29 13:26:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-29 13:26:23,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:23,775 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, 1, 1, 1, 1] [2020-10-29 13:26:23,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:26:23,775 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:23,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:23,776 INFO L82 PathProgramCache]: Analyzing trace with hash 881664243, now seen corresponding path program 1 times [2020-10-29 13:26:23,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:23,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956207040] [2020-10-29 13:26:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:23,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:24,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:24,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:24,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:24,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:25,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:25,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:26,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:26,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:27,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:27,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:28,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:28,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 13:26:28,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:26:28,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-29 13:26:28,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:28,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:28,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:26:28,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:26:28,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:26:28,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:30,798 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:26:30,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:30,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:30,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:30,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:30,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-29 13:26:30,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:30,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:26:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:26:30,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:30,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956207040] [2020-10-29 13:26:30,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:30,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:26:30,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863963822] [2020-10-29 13:26:30,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:26:30,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:26:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:26:30,953 INFO L87 Difference]: Start difference. First operand 1045 states and 1434 transitions. Second operand 6 states. [2020-10-29 13:26:32,882 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 526 [2020-10-29 13:26:40,160 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 524 [2020-10-29 13:26:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:40,973 INFO L93 Difference]: Finished difference Result 2273 states and 3191 transitions. [2020-10-29 13:26:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:26:40,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-10-29 13:26:40,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:40,983 INFO L225 Difference]: With dead ends: 2273 [2020-10-29 13:26:40,983 INFO L226 Difference]: Without dead ends: 1388 [2020-10-29 13:26:40,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:26:40,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2020-10-29 13:26:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1322. [2020-10-29 13:26:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2020-10-29 13:26:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1854 transitions. [2020-10-29 13:26:41,066 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1854 transitions. Word has length 93 [2020-10-29 13:26:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:41,066 INFO L481 AbstractCegarLoop]: Abstraction has 1322 states and 1854 transitions. [2020-10-29 13:26:41,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:26:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1854 transitions. [2020-10-29 13:26:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-29 13:26:41,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:41,070 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, 1, 1, 1, 1, 1] [2020-10-29 13:26:41,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:26:41,070 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash 755569773, now seen corresponding path program 1 times [2020-10-29 13:26:41,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:41,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990099683] [2020-10-29 13:26:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:41,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:41,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:42,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:45,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:45,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:46,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:46,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:46,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 13:26:46,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:26:46,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-29 13:26:46,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:46,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:46,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:26:46,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:26:46,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:26:46,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:48,254 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:26:48,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:48,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:48,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:48,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:48,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:48,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-29 13:26:48,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:48,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:26:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:26:48,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:26:48,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990099683] [2020-10-29 13:26:48,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:48,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:26:48,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426316079] [2020-10-29 13:26:48,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:26:48,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:48,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:26:48,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:26:48,425 INFO L87 Difference]: Start difference. First operand 1322 states and 1854 transitions. Second operand 6 states. [2020-10-29 13:26:50,357 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 526 [2020-10-29 13:26:56,780 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 524 [2020-10-29 13:26:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:57,574 INFO L93 Difference]: Finished difference Result 3251 states and 4655 transitions. [2020-10-29 13:26:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:26:57,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-10-29 13:26:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:57,587 INFO L225 Difference]: With dead ends: 3251 [2020-10-29 13:26:57,587 INFO L226 Difference]: Without dead ends: 2036 [2020-10-29 13:26:57,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:26:57,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2020-10-29 13:26:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1990. [2020-10-29 13:26:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1990 states. [2020-10-29 13:26:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 2862 transitions. [2020-10-29 13:26:57,717 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 2862 transitions. Word has length 94 [2020-10-29 13:26:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:57,718 INFO L481 AbstractCegarLoop]: Abstraction has 1990 states and 2862 transitions. [2020-10-29 13:26:57,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:26:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 2862 transitions. [2020-10-29 13:26:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 13:26:57,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:57,722 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, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:57,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:26:57,723 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:57,723 INFO L82 PathProgramCache]: Analyzing trace with hash -907697893, now seen corresponding path program 1 times [2020-10-29 13:26:57,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:57,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001235838] [2020-10-29 13:26:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:57,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:57,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:58,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:58,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:58,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:02,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:02,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 13:27:02,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:27:02,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:27:02,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:02,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:02,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:27:02,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:27:02,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:27:02,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:04,607 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:27:04,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:04,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:04,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:04,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:04,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:04,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-29 13:27:04,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:04,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:04,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:04,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:27:04,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:04,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001235838] [2020-10-29 13:27:04,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:04,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:27:04,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633342727] [2020-10-29 13:27:04,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:27:04,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:04,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:27:04,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:27:04,778 INFO L87 Difference]: Start difference. First operand 1990 states and 2862 transitions. Second operand 6 states. [2020-10-29 13:27:06,591 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-29 13:27:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:11,541 INFO L93 Difference]: Finished difference Result 3873 states and 5614 transitions. [2020-10-29 13:27:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:27:11,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-10-29 13:27:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:11,553 INFO L225 Difference]: With dead ends: 3873 [2020-10-29 13:27:11,553 INFO L226 Difference]: Without dead ends: 1968 [2020-10-29 13:27:11,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:27:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2020-10-29 13:27:11,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1968. [2020-10-29 13:27:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1968 states. [2020-10-29 13:27:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2830 transitions. [2020-10-29 13:27:11,718 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2830 transitions. Word has length 95 [2020-10-29 13:27:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:11,719 INFO L481 AbstractCegarLoop]: Abstraction has 1968 states and 2830 transitions. [2020-10-29 13:27:11,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:27:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2830 transitions. [2020-10-29 13:27:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 13:27:11,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:11,724 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:11,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:27:11,724 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:11,725 INFO L82 PathProgramCache]: Analyzing trace with hash 965769291, now seen corresponding path program 1 times [2020-10-29 13:27:11,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:11,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027396301] [2020-10-29 13:27:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:11,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:11,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:12,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:12,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:15,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:15,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:15,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:16,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:16,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:16,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 13:27:16,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:27:16,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-29 13:27:16,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:16,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:27:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:27:16,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:27:16,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:18,798 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:27:18,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:18,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:18,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:18,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:18,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:18,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:27:18,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:18,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:18,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:18,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:18,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027396301] [2020-10-29 13:27:18,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:18,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:27:18,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125790397] [2020-10-29 13:27:18,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:27:18,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:27:18,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:27:18,885 INFO L87 Difference]: Start difference. First operand 1968 states and 2830 transitions. Second operand 7 states. [2020-10-29 13:27:20,818 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 527 [2020-10-29 13:27:26,426 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 525 [2020-10-29 13:27:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:28,250 INFO L93 Difference]: Finished difference Result 3414 states and 4887 transitions. [2020-10-29 13:27:28,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:27:28,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-29 13:27:28,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:28,262 INFO L225 Difference]: With dead ends: 3414 [2020-10-29 13:27:28,263 INFO L226 Difference]: Without dead ends: 2372 [2020-10-29 13:27:28,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:27:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2020-10-29 13:27:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 1564. [2020-10-29 13:27:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-10-29 13:27:28,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2239 transitions. [2020-10-29 13:27:28,428 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2239 transitions. Word has length 96 [2020-10-29 13:27:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:28,428 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2239 transitions. [2020-10-29 13:27:28,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:27:28,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2239 transitions. [2020-10-29 13:27:28,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 13:27:28,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:28,431 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:28,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:27:28,432 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:28,432 INFO L82 PathProgramCache]: Analyzing trace with hash 34383444, now seen corresponding path program 1 times [2020-10-29 13:27:28,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:28,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030300203] [2020-10-29 13:27:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:28,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:28,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:28,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:29,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:32,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:32,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:33,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:33,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 13:27:33,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:27:33,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-29 13:27:33,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:33,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:27:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:27:33,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 13:27:33,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:27:35,411 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:27:35,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:35,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:35,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:35,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:35,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:35,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 13:27:35,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:35,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:35,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:35,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:35,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:35,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:35,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030300203] [2020-10-29 13:27:35,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:35,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:27:35,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44049799] [2020-10-29 13:27:35,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:27:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:35,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:27:35,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:27:35,507 INFO L87 Difference]: Start difference. First operand 1564 states and 2239 transitions. Second operand 8 states. [2020-10-29 13:27:37,495 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:27:43,588 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 525 [2020-10-29 13:27:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:46,051 INFO L93 Difference]: Finished difference Result 4341 states and 6365 transitions. [2020-10-29 13:27:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:27:46,052 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-29 13:27:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:46,070 INFO L225 Difference]: With dead ends: 4341 [2020-10-29 13:27:46,071 INFO L226 Difference]: Without dead ends: 3745 [2020-10-29 13:27:46,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:27:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2020-10-29 13:27:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 1564. [2020-10-29 13:27:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-10-29 13:27:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2237 transitions. [2020-10-29 13:27:46,299 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2237 transitions. Word has length 96 [2020-10-29 13:27:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:46,300 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2237 transitions. [2020-10-29 13:27:46,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:27:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2237 transitions. [2020-10-29 13:27:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 13:27:46,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:46,303 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:46,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:27:46,303 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:46,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1392466273, now seen corresponding path program 1 times [2020-10-29 13:27:46,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:46,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956103464] [2020-10-29 13:27:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:46,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:46,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:46,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:46,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:47,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:48,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:48,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:49,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:49,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:51,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:51,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:51,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:51,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:51,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 13:27:51,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:27:51,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:27:51,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:51,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:27:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:27:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 13:27:51,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:53,269 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:27:53,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:53,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:53,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:53,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:53,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:53,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:27:53,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:53,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:53,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:53,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:53,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:53,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:53,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956103464] [2020-10-29 13:27:53,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:53,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:27:53,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827365927] [2020-10-29 13:27:53,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:27:53,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:27:53,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:27:53,330 INFO L87 Difference]: Start difference. First operand 1564 states and 2237 transitions. Second operand 8 states. [2020-10-29 13:27:55,304 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:28:00,785 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 525 [2020-10-29 13:28:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:02,680 INFO L93 Difference]: Finished difference Result 3168 states and 4642 transitions. [2020-10-29 13:28:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:28:02,680 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-29 13:28:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:02,692 INFO L225 Difference]: With dead ends: 3168 [2020-10-29 13:28:02,692 INFO L226 Difference]: Without dead ends: 2440 [2020-10-29 13:28:02,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:28:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2020-10-29 13:28:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1564. [2020-10-29 13:28:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-10-29 13:28:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2236 transitions. [2020-10-29 13:28:02,852 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2236 transitions. Word has length 96 [2020-10-29 13:28:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:02,853 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2236 transitions. [2020-10-29 13:28:02,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:28:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2236 transitions. [2020-10-29 13:28:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 13:28:02,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:02,856 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:02,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:28:02,857 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:02,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:02,857 INFO L82 PathProgramCache]: Analyzing trace with hash 156740272, now seen corresponding path program 1 times [2020-10-29 13:28:02,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:02,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882304451] [2020-10-29 13:28:02,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:02,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:03,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:03,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:03,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:05,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:05,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:06,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:06,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:06,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:07,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:07,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:08,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:08,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 13:28:08,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:28:08,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-29 13:28:08,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:08,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:28:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:28:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 13:28:08,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:09,898 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:28:09,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:09,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:09,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:09,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:09,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:09,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:28:09,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:09,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:09,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:09,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:09,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:09,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:10,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882304451] [2020-10-29 13:28:10,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:10,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:28:10,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032231865] [2020-10-29 13:28:10,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:28:10,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:10,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:28:10,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:28:10,010 INFO L87 Difference]: Start difference. First operand 1564 states and 2236 transitions. Second operand 8 states. [2020-10-29 13:28:11,965 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:28:18,522 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 525 [2020-10-29 13:28:20,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:20,377 INFO L93 Difference]: Finished difference Result 4331 states and 6345 transitions. [2020-10-29 13:28:20,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:28:20,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-29 13:28:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:20,395 INFO L225 Difference]: With dead ends: 4331 [2020-10-29 13:28:20,395 INFO L226 Difference]: Without dead ends: 3745 [2020-10-29 13:28:20,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:28:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2020-10-29 13:28:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 1564. [2020-10-29 13:28:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-10-29 13:28:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2235 transitions. [2020-10-29 13:28:20,566 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2235 transitions. Word has length 96 [2020-10-29 13:28:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:20,566 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2235 transitions. [2020-10-29 13:28:20,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:28:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2235 transitions. [2020-10-29 13:28:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 13:28:20,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:20,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:20,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:28:20,570 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:20,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:20,571 INFO L82 PathProgramCache]: Analyzing trace with hash -920979015, now seen corresponding path program 1 times [2020-10-29 13:28:20,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:20,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354359336] [2020-10-29 13:28:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:20,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:20,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:20,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:21,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:21,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:23,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:23,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:23,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:24,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:24,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:25,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:25,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:25,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 13:28:25,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:28:25,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:28:25,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:25,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:25,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:28:25,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:28:25,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 13:28:25,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:27,573 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:28:27,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:27,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:27,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:27,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:27,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:27,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-29 13:28:27,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:27,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:27,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:27,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354359336] [2020-10-29 13:28:27,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:27,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:28:27,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368615778] [2020-10-29 13:28:27,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:28:27,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:27,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:28:27,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:28:27,709 INFO L87 Difference]: Start difference. First operand 1564 states and 2235 transitions. Second operand 8 states. [2020-10-29 13:28:29,645 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-29 13:28:36,652 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 525 [2020-10-29 13:28:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:39,357 INFO L93 Difference]: Finished difference Result 3499 states and 5120 transitions. [2020-10-29 13:28:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:28:39,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-29 13:28:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:39,373 INFO L225 Difference]: With dead ends: 3499 [2020-10-29 13:28:39,374 INFO L226 Difference]: Without dead ends: 2776 [2020-10-29 13:28:39,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:28:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2020-10-29 13:28:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 1564. [2020-10-29 13:28:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-10-29 13:28:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2233 transitions. [2020-10-29 13:28:39,553 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2233 transitions. Word has length 98 [2020-10-29 13:28:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:39,554 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2233 transitions. [2020-10-29 13:28:39,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:28:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2233 transitions. [2020-10-29 13:28:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 13:28:39,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:39,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:39,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:28:39,558 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:39,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1671964764, now seen corresponding path program 1 times [2020-10-29 13:28:39,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:39,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984660057] [2020-10-29 13:28:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:39,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:39,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:40,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:41,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:41,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:41,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:42,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:42,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:42,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:43,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:43,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:44,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:44,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 13:28:44,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:28:44,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-29 13:28:44,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:44,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:28:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 13:28:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 13:28:44,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:46,472 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:28:46,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:46,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:46,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:46,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:46,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:46,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:28:46,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:46,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:46,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:46,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:46,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:46,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:46,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984660057] [2020-10-29 13:28:46,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:46,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:28:46,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793584833] [2020-10-29 13:28:46,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:28:46,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:46,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:28:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:28:46,534 INFO L87 Difference]: Start difference. First operand 1564 states and 2233 transitions. Second operand 6 states. [2020-10-29 13:28:48,413 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 518 [2020-10-29 13:28:56,080 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 519 [2020-10-29 13:28:58,529 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 518 [2020-10-29 13:29:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:01,232 INFO L93 Difference]: Finished difference Result 8078 states and 11872 transitions. [2020-10-29 13:29:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:29:01,233 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-29 13:29:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:01,263 INFO L225 Difference]: With dead ends: 8078 [2020-10-29 13:29:01,263 INFO L226 Difference]: Without dead ends: 7444 [2020-10-29 13:29:01,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:29:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7444 states. [2020-10-29 13:29:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7444 to 4816. [2020-10-29 13:29:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4816 states. [2020-10-29 13:29:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 7045 transitions. [2020-10-29 13:29:01,749 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 7045 transitions. Word has length 98 [2020-10-29 13:29:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:01,749 INFO L481 AbstractCegarLoop]: Abstraction has 4816 states and 7045 transitions. [2020-10-29 13:29:01,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:29:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 7045 transitions. [2020-10-29 13:29:01,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 13:29:01,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:01,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:01,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:29:01,756 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:01,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1046295651, now seen corresponding path program 1 times [2020-10-29 13:29:01,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:01,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628204152] [2020-10-29 13:29:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:01,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:01,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:02,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:02,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:02,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:03,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:04,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:06,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:06,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 13:29:06,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:29:06,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:29:06,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:06,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:06,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:29:06,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:29:06,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 13:29:06,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:08,784 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-29 13:29:08,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:08,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:08,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:08,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:08,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:08,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:29:08,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:08,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:08,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:08,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:08,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:08,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:08,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628204152] [2020-10-29 13:29:08,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:08,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:29:08,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532838644] [2020-10-29 13:29:08,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:29:08,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:08,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:29:08,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:29:08,878 INFO L87 Difference]: Start difference. First operand 4816 states and 7045 transitions. Second operand 8 states.