/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=BIGGEST --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 -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:37:01,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:37:01,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:37:01,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:37:01,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:37:01,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:37:01,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:37:01,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:37:01,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:37:01,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:37:01,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:37:01,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:37:01,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:37:01,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:37:01,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:37:01,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:37:01,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:37:01,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:37:01,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:37:01,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:37:01,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:37:01,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:37:01,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:37:01,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:37:01,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:37:01,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:37:01,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:37:01,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:37:01,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:37:01,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:37:01,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:37:01,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:37:01,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:37:01,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:37:01,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:37:01,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:37:01,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:37:01,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:37:01,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:37:01,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:37:01,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:37:01,275 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 [2020-10-12 19:37:01,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:37:01,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:37:01,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:37:01,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:37:01,332 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:37:01,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:37:01,332 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:37:01,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:37:01,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:37:01,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:37:01,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:37:01,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:37:01,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:37:01,334 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:37:01,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:37:01,334 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:37:01,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:37:01,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:37:01,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:37:01,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:37:01,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:37:01,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:37:01,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:37:01,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:37:01,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:37:01,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:37:01,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:37:01,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:37:01,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:37:01,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:37:01,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:37:01,677 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:37:01,681 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:37:01,682 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:37:01,682 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:37:01,683 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:37:01,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7a114250/8069c4f940a04a88a9362a1f3298b99b/FLAG982ef4f78 [2020-10-12 19:37:02,230 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:37:02,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:37:02,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7a114250/8069c4f940a04a88a9362a1f3298b99b/FLAG982ef4f78 [2020-10-12 19:37:02,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7a114250/8069c4f940a04a88a9362a1f3298b99b [2020-10-12 19:37:02,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:37:02,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:37:02,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:37:02,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:37:02,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:37:02,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:37:02" (1/1) ... [2020-10-12 19:37:02,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e60d8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:02, skipping insertion in model container [2020-10-12 19:37:02,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:37:02" (1/1) ... [2020-10-12 19:37:02,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:37:02,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:37:02,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:37:03,048 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:37:03,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:37:03,141 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:37:03,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:03 WrapperNode [2020-10-12 19:37:03,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:37:03,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:37:03,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:37:03,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:37:03,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:03" (1/1) ... [2020-10-12 19:37:03,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:03" (1/1) ... [2020-10-12 19:37:03,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:03" (1/1) ... [2020-10-12 19:37:03,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:03" (1/1) ... [2020-10-12 19:37:03,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:03" (1/1) ... [2020-10-12 19:37:03,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:03" (1/1) ... [2020-10-12 19:37:03,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:03" (1/1) ... [2020-10-12 19:37:03,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:37:03,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:37:03,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:37:03,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:37:03,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:37:03,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:37:03,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:37:03,265 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:37:03,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:37:03,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:37:03,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:37:03,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:37:03,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:37:03,266 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:37:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:37:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:37:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:37:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:37:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:37:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:37:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:37:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:37:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 19:37:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:37:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:37:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:37:03,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:37:03,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:37:03,934 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:37:03,935 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:37:03,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:37:03 BoogieIcfgContainer [2020-10-12 19:37:03,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:37:03,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:37:03,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:37:03,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:37:03,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:37:02" (1/3) ... [2020-10-12 19:37:03,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce00e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:37:03, skipping insertion in model container [2020-10-12 19:37:03,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:37:03" (2/3) ... [2020-10-12 19:37:03,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce00e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:37:03, skipping insertion in model container [2020-10-12 19:37:03,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:37:03" (3/3) ... [2020-10-12 19:37:03,951 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:37:03,963 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:37:03,972 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:37:03,988 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:37:04,015 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:37:04,015 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:37:04,015 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:37:04,015 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:37:04,016 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:37:04,016 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:37:04,016 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:37:04,016 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:37:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states. [2020-10-12 19:37:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:37:04,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:04,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:04,051 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:04,059 INFO L82 PathProgramCache]: Analyzing trace with hash 820544625, now seen corresponding path program 1 times [2020-10-12 19:37:04,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:04,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77749740] [2020-10-12 19:37:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:04,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:04,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:05,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:05,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:07,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:09,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:09,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:37:09,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:37:09,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 19:37:09,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:09,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:37:09,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:37:09,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:37:09,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:37:09,770 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:09,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:09,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:09,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:09,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:09,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:09,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:37:09,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:09,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:09,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:09,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:37:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:09,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77749740] [2020-10-12 19:37:09,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:09,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:37:09,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120070972] [2020-10-12 19:37:09,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:37:09,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:09,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:37:09,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:37:09,857 INFO L87 Difference]: Start difference. First operand 104 states. Second operand 8 states. [2020-10-12 19:37:10,159 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:37:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:11,108 INFO L93 Difference]: Finished difference Result 748 states and 1180 transitions. [2020-10-12 19:37:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:37:11,111 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-10-12 19:37:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:11,134 INFO L225 Difference]: With dead ends: 748 [2020-10-12 19:37:11,135 INFO L226 Difference]: Without dead ends: 658 [2020-10-12 19:37:11,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:37:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-12 19:37:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 160. [2020-10-12 19:37:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 19:37:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 231 transitions. [2020-10-12 19:37:11,224 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 231 transitions. Word has length 64 [2020-10-12 19:37:11,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:11,225 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 231 transitions. [2020-10-12 19:37:11,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:37:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 231 transitions. [2020-10-12 19:37:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:37:11,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:11,228 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] [2020-10-12 19:37:11,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:37:11,229 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:11,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1448175536, now seen corresponding path program 1 times [2020-10-12 19:37:11,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:11,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002400368] [2020-10-12 19:37:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:11,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:11,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:12,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:12,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:12,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:16,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:16,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:37:16,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:37:16,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:37:16,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:37:16,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:37:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 19:37:16,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:37:16,528 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:16,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:16,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:16,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:16,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:16,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:16,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:37:16,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:16,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:16,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:16,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:16,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:37:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:16,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002400368] [2020-10-12 19:37:16,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:16,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:37:16,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006392707] [2020-10-12 19:37:16,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:37:16,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:16,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:37:16,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:37:16,570 INFO L87 Difference]: Start difference. First operand 160 states and 231 transitions. Second operand 8 states. [2020-10-12 19:37:16,743 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-12 19:37:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:17,679 INFO L93 Difference]: Finished difference Result 768 states and 1184 transitions. [2020-10-12 19:37:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:37:17,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:37:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:17,683 INFO L225 Difference]: With dead ends: 768 [2020-10-12 19:37:17,684 INFO L226 Difference]: Without dead ends: 646 [2020-10-12 19:37:17,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:37:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-12 19:37:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 170. [2020-10-12 19:37:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-12 19:37:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 246 transitions. [2020-10-12 19:37:17,710 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 246 transitions. Word has length 66 [2020-10-12 19:37:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:17,710 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 246 transitions. [2020-10-12 19:37:17,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:37:17,711 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 246 transitions. [2020-10-12 19:37:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:37:17,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:17,713 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] [2020-10-12 19:37:17,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:37:17,713 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:17,714 INFO L82 PathProgramCache]: Analyzing trace with hash -538162814, now seen corresponding path program 1 times [2020-10-12 19:37:17,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:17,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571204509] [2020-10-12 19:37:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:17,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:17,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:17,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:17,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:18,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:20,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:20,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:20,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:22,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:22,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:37:22,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:37:22,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 19:37:22,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:22,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:37:22,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:37:22,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:37:22,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:37:22,964 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:22,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:22,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:22,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:22,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:22,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:22,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:37:22,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:22,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:22,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571204509] [2020-10-12 19:37:22,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:22,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:37:22,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934486593] [2020-10-12 19:37:22,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:37:22,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:37:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:37:23,001 INFO L87 Difference]: Start difference. First operand 170 states and 246 transitions. Second operand 8 states. [2020-10-12 19:37:23,164 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-12 19:37:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:23,930 INFO L93 Difference]: Finished difference Result 768 states and 1183 transitions. [2020-10-12 19:37:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:37:23,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:37:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:23,938 INFO L225 Difference]: With dead ends: 768 [2020-10-12 19:37:23,938 INFO L226 Difference]: Without dead ends: 646 [2020-10-12 19:37:23,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:37:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-12 19:37:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 216. [2020-10-12 19:37:23,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-12 19:37:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 318 transitions. [2020-10-12 19:37:23,991 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 318 transitions. Word has length 66 [2020-10-12 19:37:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:23,992 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 318 transitions. [2020-10-12 19:37:23,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:37:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 318 transitions. [2020-10-12 19:37:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:37:23,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:24,003 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] [2020-10-12 19:37:24,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:37:24,004 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:24,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1671177964, now seen corresponding path program 1 times [2020-10-12 19:37:24,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:24,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917338341] [2020-10-12 19:37:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:24,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:24,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:24,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:24,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:24,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:25,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:25,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:25,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:29,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:29,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:37:29,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:37:29,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4958 [2020-10-12 19:37:29,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:29,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:37:29,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:37:29,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:37:29,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:29,196 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:29,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:29,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:29,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:29,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:29,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:29,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 19:37:29,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:37:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:37:29,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:29,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917338341] [2020-10-12 19:37:29,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:29,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:37:29,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500021766] [2020-10-12 19:37:29,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:37:29,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:29,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:37:29,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:37:29,242 INFO L87 Difference]: Start difference. First operand 216 states and 318 transitions. Second operand 6 states. [2020-10-12 19:37:29,395 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:37:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:29,824 INFO L93 Difference]: Finished difference Result 458 states and 700 transitions. [2020-10-12 19:37:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:37:29,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-12 19:37:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:29,827 INFO L225 Difference]: With dead ends: 458 [2020-10-12 19:37:29,828 INFO L226 Difference]: Without dead ends: 283 [2020-10-12 19:37:29,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:37:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-12 19:37:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 278. [2020-10-12 19:37:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-12 19:37:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 417 transitions. [2020-10-12 19:37:29,859 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 417 transitions. Word has length 66 [2020-10-12 19:37:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:29,860 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 417 transitions. [2020-10-12 19:37:29,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:37:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 417 transitions. [2020-10-12 19:37:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:37:29,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:29,862 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] [2020-10-12 19:37:29,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:37:29,862 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:29,863 INFO L82 PathProgramCache]: Analyzing trace with hash 685311829, now seen corresponding path program 1 times [2020-10-12 19:37:29,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:29,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416987639] [2020-10-12 19:37:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:29,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:29,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:29,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:30,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:30,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:31,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:33,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:33,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:37:33,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:37:33,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3424 [2020-10-12 19:37:33,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:37:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:37:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:37:33,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:33,499 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:33,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:33,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:33,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:33,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:33,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:33,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:37:33,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:33,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:33,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:33,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:33,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:37:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:33,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416987639] [2020-10-12 19:37:33,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:33,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:37:33,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101187909] [2020-10-12 19:37:33,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:37:33,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:33,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:37:33,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:37:33,551 INFO L87 Difference]: Start difference. First operand 278 states and 417 transitions. Second operand 8 states. [2020-10-12 19:37:33,797 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:37:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:34,729 INFO L93 Difference]: Finished difference Result 2027 states and 3167 transitions. [2020-10-12 19:37:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:37:34,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:37:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:34,741 INFO L225 Difference]: With dead ends: 2027 [2020-10-12 19:37:34,741 INFO L226 Difference]: Without dead ends: 1787 [2020-10-12 19:37:34,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:37:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2020-10-12 19:37:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 627. [2020-10-12 19:37:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-10-12 19:37:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 966 transitions. [2020-10-12 19:37:34,821 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 966 transitions. Word has length 66 [2020-10-12 19:37:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:34,822 INFO L479 AbstractCegarLoop]: Abstraction has 627 states and 966 transitions. [2020-10-12 19:37:34,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:37:34,823 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 966 transitions. [2020-10-12 19:37:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:37:34,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:34,824 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] [2020-10-12 19:37:34,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:37:34,824 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:34,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:34,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1301026521, now seen corresponding path program 1 times [2020-10-12 19:37:34,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:34,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955744752] [2020-10-12 19:37:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:34,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:34,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:34,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:35,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:35,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:35,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:35,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:38,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:38,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:37:38,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:37:38,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3266 [2020-10-12 19:37:38,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:37:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:37:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:37:38,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:37:38,325 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:38,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:38,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:38,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:38,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:38,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:38,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:37:38,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:38,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:38,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:38,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:38,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:38,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955744752] [2020-10-12 19:37:38,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:38,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:37:38,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002832466] [2020-10-12 19:37:38,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:37:38,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:37:38,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:37:38,360 INFO L87 Difference]: Start difference. First operand 627 states and 966 transitions. Second operand 8 states. [2020-10-12 19:37:38,532 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:37:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:39,214 INFO L93 Difference]: Finished difference Result 2470 states and 3852 transitions. [2020-10-12 19:37:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:37:39,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:37:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:39,226 INFO L225 Difference]: With dead ends: 2470 [2020-10-12 19:37:39,226 INFO L226 Difference]: Without dead ends: 2119 [2020-10-12 19:37:39,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:37:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2020-10-12 19:37:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 984. [2020-10-12 19:37:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-10-12 19:37:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1529 transitions. [2020-10-12 19:37:39,334 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1529 transitions. Word has length 66 [2020-10-12 19:37:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:39,335 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1529 transitions. [2020-10-12 19:37:39,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:37:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1529 transitions. [2020-10-12 19:37:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:37:39,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:39,337 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] [2020-10-12 19:37:39,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:37:39,338 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:39,339 INFO L82 PathProgramCache]: Analyzing trace with hash 908314257, now seen corresponding path program 1 times [2020-10-12 19:37:39,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:39,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999226579] [2020-10-12 19:37:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:39,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:39,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:40,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:40,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:37:40,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:37:40,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1223 [2020-10-12 19:37:40,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:40,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:37:40,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-12 19:37:40,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:37:40,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:40,733 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:40,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:40,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:40,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:40,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:40,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:40,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:37:40,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:40,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:40,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:40,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:40,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:40,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999226579] [2020-10-12 19:37:40,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:40,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:37:40,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892798906] [2020-10-12 19:37:40,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:37:40,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:40,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:37:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:37:40,761 INFO L87 Difference]: Start difference. First operand 984 states and 1529 transitions. Second operand 5 states. [2020-10-12 19:37:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:41,490 INFO L93 Difference]: Finished difference Result 1935 states and 3011 transitions. [2020-10-12 19:37:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:37:41,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 19:37:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:41,500 INFO L225 Difference]: With dead ends: 1935 [2020-10-12 19:37:41,501 INFO L226 Difference]: Without dead ends: 1933 [2020-10-12 19:37:41,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:37:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-10-12 19:37:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1012. [2020-10-12 19:37:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2020-10-12 19:37:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1557 transitions. [2020-10-12 19:37:41,607 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1557 transitions. Word has length 66 [2020-10-12 19:37:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:41,608 INFO L479 AbstractCegarLoop]: Abstraction has 1012 states and 1557 transitions. [2020-10-12 19:37:41,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:37:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1557 transitions. [2020-10-12 19:37:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:37:41,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:41,609 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] [2020-10-12 19:37:41,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:37:41,610 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:41,610 INFO L82 PathProgramCache]: Analyzing trace with hash 928363600, now seen corresponding path program 1 times [2020-10-12 19:37:41,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:41,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148264534] [2020-10-12 19:37:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:41,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:41,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:41,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:41,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:41,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:42,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:42,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:37:42,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:37:42,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-12 19:37:42,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:42,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:37:42,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:37:42,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:37:42,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:42,998 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:42,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:43,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:43,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:43,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:43,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:43,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:37:43,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:43,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:43,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:43,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:43,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:43,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148264534] [2020-10-12 19:37:43,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:43,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:37:43,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660496890] [2020-10-12 19:37:43,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:37:43,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:43,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:37:43,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:37:43,038 INFO L87 Difference]: Start difference. First operand 1012 states and 1557 transitions. Second operand 8 states. [2020-10-12 19:37:43,254 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-12 19:37:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:44,045 INFO L93 Difference]: Finished difference Result 3075 states and 4762 transitions. [2020-10-12 19:37:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:37:44,045 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:37:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:44,056 INFO L225 Difference]: With dead ends: 3075 [2020-10-12 19:37:44,056 INFO L226 Difference]: Without dead ends: 2101 [2020-10-12 19:37:44,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:37:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2020-10-12 19:37:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1012. [2020-10-12 19:37:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2020-10-12 19:37:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1549 transitions. [2020-10-12 19:37:44,192 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1549 transitions. Word has length 66 [2020-10-12 19:37:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:44,193 INFO L479 AbstractCegarLoop]: Abstraction has 1012 states and 1549 transitions. [2020-10-12 19:37:44,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:37:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1549 transitions. [2020-10-12 19:37:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:37:44,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:44,194 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] [2020-10-12 19:37:44,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:37:44,195 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:44,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1324771743, now seen corresponding path program 1 times [2020-10-12 19:37:44,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:44,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648088490] [2020-10-12 19:37:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:44,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:44,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:44,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:44,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:44,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:44,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:44,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:46,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:46,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:37:46,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:37:46,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2770 [2020-10-12 19:37:46,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:37:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:37:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:37:46,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:47,147 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:47,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:47,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:47,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:47,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:47,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:47,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:37:47,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:47,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:47,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:47,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:47,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:47,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648088490] [2020-10-12 19:37:47,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:47,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:37:47,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080088098] [2020-10-12 19:37:47,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:37:47,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:47,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:37:47,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:37:47,178 INFO L87 Difference]: Start difference. First operand 1012 states and 1549 transitions. Second operand 8 states. [2020-10-12 19:37:47,359 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:37:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:48,244 INFO L93 Difference]: Finished difference Result 2899 states and 4467 transitions. [2020-10-12 19:37:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:37:48,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:37:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:48,258 INFO L225 Difference]: With dead ends: 2899 [2020-10-12 19:37:48,259 INFO L226 Difference]: Without dead ends: 2540 [2020-10-12 19:37:48,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:37:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2020-10-12 19:37:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1258. [2020-10-12 19:37:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1258 states. [2020-10-12 19:37:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1931 transitions. [2020-10-12 19:37:48,407 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1931 transitions. Word has length 66 [2020-10-12 19:37:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:48,408 INFO L479 AbstractCegarLoop]: Abstraction has 1258 states and 1931 transitions. [2020-10-12 19:37:48,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:37:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1931 transitions. [2020-10-12 19:37:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:37:48,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:48,409 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] [2020-10-12 19:37:48,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:37:48,410 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:48,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:48,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1697297637, now seen corresponding path program 1 times [2020-10-12 19:37:48,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:48,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587509091] [2020-10-12 19:37:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:48,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:48,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:48,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:48,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:48,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:48,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:49,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:50,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:50,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:37:50,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:37:50,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2501 [2020-10-12 19:37:50,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:50,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:37:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:37:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:37:50,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:51,098 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:51,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:51,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:51,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:51,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:51,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:51,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:37:51,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:51,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:51,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:51,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:51,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:37:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:51,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587509091] [2020-10-12 19:37:51,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:51,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:37:51,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147113189] [2020-10-12 19:37:51,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:37:51,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:37:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:37:51,131 INFO L87 Difference]: Start difference. First operand 1258 states and 1931 transitions. Second operand 8 states. [2020-10-12 19:37:51,332 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:37:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:52,264 INFO L93 Difference]: Finished difference Result 3191 states and 4919 transitions. [2020-10-12 19:37:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:37:52,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:37:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:52,279 INFO L225 Difference]: With dead ends: 3191 [2020-10-12 19:37:52,279 INFO L226 Difference]: Without dead ends: 2832 [2020-10-12 19:37:52,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:37:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2020-10-12 19:37:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1504. [2020-10-12 19:37:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1504 states. [2020-10-12 19:37:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2313 transitions. [2020-10-12 19:37:52,454 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2313 transitions. Word has length 66 [2020-10-12 19:37:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:52,454 INFO L479 AbstractCegarLoop]: Abstraction has 1504 states and 2313 transitions. [2020-10-12 19:37:52,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:37:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2313 transitions. [2020-10-12 19:37:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:37:52,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:52,456 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] [2020-10-12 19:37:52,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:37:52,456 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:52,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1897409334, now seen corresponding path program 1 times [2020-10-12 19:37:52,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:52,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308622808] [2020-10-12 19:37:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:52,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:52,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:52,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:52,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:52,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:52,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:53,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:53,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:37:53,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:37:53,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-12 19:37:53,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:53,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:37:53,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 19:37:53,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:37:53,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:53,152 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:53,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:53,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:53,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:53,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:53,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:53,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:37:53,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:53,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:53,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:53,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:53,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:53,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308622808] [2020-10-12 19:37:53,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:53,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:37:53,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860910882] [2020-10-12 19:37:53,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:37:53,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:37:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:37:53,179 INFO L87 Difference]: Start difference. First operand 1504 states and 2313 transitions. Second operand 4 states. [2020-10-12 19:37:53,349 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-12 19:37:54,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:54,020 INFO L93 Difference]: Finished difference Result 4244 states and 6551 transitions. [2020-10-12 19:37:54,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:37:54,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-12 19:37:54,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:54,035 INFO L225 Difference]: With dead ends: 4244 [2020-10-12 19:37:54,035 INFO L226 Difference]: Without dead ends: 2778 [2020-10-12 19:37:54,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:37:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2020-10-12 19:37:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2776. [2020-10-12 19:37:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2776 states. [2020-10-12 19:37:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 4251 transitions. [2020-10-12 19:37:54,347 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 4251 transitions. Word has length 67 [2020-10-12 19:37:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:54,348 INFO L479 AbstractCegarLoop]: Abstraction has 2776 states and 4251 transitions. [2020-10-12 19:37:54,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:37:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 4251 transitions. [2020-10-12 19:37:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:37:54,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:54,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:54,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:37:54,350 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:54,350 INFO L82 PathProgramCache]: Analyzing trace with hash 719004060, now seen corresponding path program 1 times [2020-10-12 19:37:54,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:54,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580445173] [2020-10-12 19:37:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:54,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:54,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:54,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:54,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:54,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:54,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:55,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:55,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:37:55,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:37:55,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1239 [2020-10-12 19:37:55,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:55,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:37:55,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:37:55,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:37:55,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:55,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:55,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:55,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:55,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:55,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:55,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:37:55,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:37:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:37:55,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:55,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580445173] [2020-10-12 19:37:55,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:55,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:37:55,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436769755] [2020-10-12 19:37:55,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:37:55,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:55,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:37:55,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:37:55,765 INFO L87 Difference]: Start difference. First operand 2776 states and 4251 transitions. Second operand 6 states. [2020-10-12 19:37:55,931 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-12 19:37:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:56,487 INFO L93 Difference]: Finished difference Result 5514 states and 8464 transitions. [2020-10-12 19:37:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:37:56,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-12 19:37:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:56,500 INFO L225 Difference]: With dead ends: 5514 [2020-10-12 19:37:56,500 INFO L226 Difference]: Without dead ends: 2776 [2020-10-12 19:37:56,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:37:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2020-10-12 19:37:56,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2776. [2020-10-12 19:37:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2776 states. [2020-10-12 19:37:56,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 4227 transitions. [2020-10-12 19:37:56,776 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 4227 transitions. Word has length 68 [2020-10-12 19:37:56,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:56,777 INFO L479 AbstractCegarLoop]: Abstraction has 2776 states and 4227 transitions. [2020-10-12 19:37:56,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:37:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 4227 transitions. [2020-10-12 19:37:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:37:56,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:56,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:56,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:37:56,779 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:56,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:56,779 INFO L82 PathProgramCache]: Analyzing trace with hash 54187799, now seen corresponding path program 1 times [2020-10-12 19:37:56,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:56,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067108321] [2020-10-12 19:37:56,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:56,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:56,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:56,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:56,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:56,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:57,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:57,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:37:57,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:37:57,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-12 19:37:57,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:57,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:37:57,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:37:57,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 19:37:57,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:57,264 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:37:57,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:57,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:57,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:57,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:57,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:57,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:37:57,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:57,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:57,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:57,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:57,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:57,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067108321] [2020-10-12 19:37:57,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:57,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:37:57,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166297598] [2020-10-12 19:37:57,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:37:57,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:37:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:37:57,296 INFO L87 Difference]: Start difference. First operand 2776 states and 4227 transitions. Second operand 4 states. [2020-10-12 19:37:57,439 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-12 19:37:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:58,109 INFO L93 Difference]: Finished difference Result 6724 states and 10247 transitions. [2020-10-12 19:37:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:37:58,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-12 19:37:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:58,126 INFO L225 Difference]: With dead ends: 6724 [2020-10-12 19:37:58,126 INFO L226 Difference]: Without dead ends: 3986 [2020-10-12 19:37:58,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:37:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2020-10-12 19:37:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3960. [2020-10-12 19:37:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3960 states. [2020-10-12 19:37:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5975 transitions. [2020-10-12 19:37:58,588 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5975 transitions. Word has length 68 [2020-10-12 19:37:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:58,589 INFO L479 AbstractCegarLoop]: Abstraction has 3960 states and 5975 transitions. [2020-10-12 19:37:58,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:37:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5975 transitions. [2020-10-12 19:37:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:37:58,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:58,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:37:58,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:37:58,591 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:58,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1519530188, now seen corresponding path program 1 times [2020-10-12 19:37:58,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:58,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691228107] [2020-10-12 19:37:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:58,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:58,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:58,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:58,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:58,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:58,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:59,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:03,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:03,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:38:03,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:38:03,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:38:03,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 19:38:03,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:38:03,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:03,772 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:38:03,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:03,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:03,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:03,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:03,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:03,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:38:03,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:03,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:03,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:03,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:03,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:03,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691228107] [2020-10-12 19:38:03,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:03,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:38:03,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706694927] [2020-10-12 19:38:03,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:03,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:03,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:03,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:03,795 INFO L87 Difference]: Start difference. First operand 3960 states and 5975 transitions. Second operand 8 states. [2020-10-12 19:38:03,971 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:38:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:05,306 INFO L93 Difference]: Finished difference Result 8314 states and 12586 transitions. [2020-10-12 19:38:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:38:05,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-12 19:38:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:05,324 INFO L225 Difference]: With dead ends: 8314 [2020-10-12 19:38:05,324 INFO L226 Difference]: Without dead ends: 7646 [2020-10-12 19:38:05,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:38:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7646 states. [2020-10-12 19:38:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7646 to 4420. [2020-10-12 19:38:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4420 states. [2020-10-12 19:38:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 6679 transitions. [2020-10-12 19:38:05,818 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 6679 transitions. Word has length 68 [2020-10-12 19:38:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:05,818 INFO L479 AbstractCegarLoop]: Abstraction has 4420 states and 6679 transitions. [2020-10-12 19:38:05,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 6679 transitions. [2020-10-12 19:38:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:38:05,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:05,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:38:05,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:38:05,821 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1726248667, now seen corresponding path program 1 times [2020-10-12 19:38:05,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:05,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747885938] [2020-10-12 19:38:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:05,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:05,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:06,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:06,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:06,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:07,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:07,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:38:07,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:38:07,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-12 19:38:07,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:07,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:38:07,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-12 19:38:07,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 19:38:07,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:07,485 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:38:07,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:07,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:07,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:07,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:07,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:38:07,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:07,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:07,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:07,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:07,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:07,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747885938] [2020-10-12 19:38:07,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:07,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:38:07,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941326627] [2020-10-12 19:38:07,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:38:07,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:38:07,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:38:07,506 INFO L87 Difference]: Start difference. First operand 4420 states and 6679 transitions. Second operand 8 states. [2020-10-12 19:38:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:08,986 INFO L93 Difference]: Finished difference Result 9614 states and 14359 transitions. [2020-10-12 19:38:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 19:38:08,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-12 19:38:08,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:09,005 INFO L225 Difference]: With dead ends: 9614 [2020-10-12 19:38:09,006 INFO L226 Difference]: Without dead ends: 8654 [2020-10-12 19:38:09,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:38:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8654 states. [2020-10-12 19:38:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8654 to 4566. [2020-10-12 19:38:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4566 states. [2020-10-12 19:38:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 6894 transitions. [2020-10-12 19:38:09,653 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 6894 transitions. Word has length 69 [2020-10-12 19:38:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:09,653 INFO L479 AbstractCegarLoop]: Abstraction has 4566 states and 6894 transitions. [2020-10-12 19:38:09,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:38:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 6894 transitions. [2020-10-12 19:38:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:38:09,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:09,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:38:09,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:38:09,655 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:09,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:09,655 INFO L82 PathProgramCache]: Analyzing trace with hash -339328508, now seen corresponding path program 1 times [2020-10-12 19:38:09,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:09,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234628951] [2020-10-12 19:38:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:09,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:09,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:09,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:09,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:09,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:10,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:10,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:38:10,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:38:10,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-10-12 19:38:10,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:10,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:38:10,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:38:10,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:38:10,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:10,579 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:38:10,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:10,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:10,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:10,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:10,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:38:10,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:10,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:38:10,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:10,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:38:10,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:10,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234628951] [2020-10-12 19:38:10,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:10,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:38:10,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116271083] [2020-10-12 19:38:10,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:38:10,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:10,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:38:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:38:10,614 INFO L87 Difference]: Start difference. First operand 4566 states and 6894 transitions. Second operand 7 states. [2020-10-12 19:38:10,757 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:38:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:12,289 INFO L93 Difference]: Finished difference Result 14866 states and 22400 transitions. [2020-10-12 19:38:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:38:12,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 19:38:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:12,313 INFO L225 Difference]: With dead ends: 14866 [2020-10-12 19:38:12,314 INFO L226 Difference]: Without dead ends: 10364 [2020-10-12 19:38:12,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:38:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10364 states. [2020-10-12 19:38:12,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10364 to 4446. [2020-10-12 19:38:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4446 states. [2020-10-12 19:38:12,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4446 states to 4446 states and 6714 transitions. [2020-10-12 19:38:12,905 INFO L78 Accepts]: Start accepts. Automaton has 4446 states and 6714 transitions. Word has length 69 [2020-10-12 19:38:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:12,906 INFO L479 AbstractCegarLoop]: Abstraction has 4446 states and 6714 transitions. [2020-10-12 19:38:12,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:38:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4446 states and 6714 transitions. [2020-10-12 19:38:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:38:12,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:12,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:38:12,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:38:12,907 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:12,908 INFO L82 PathProgramCache]: Analyzing trace with hash -954176716, now seen corresponding path program 1 times [2020-10-12 19:38:12,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:12,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789024821] [2020-10-12 19:38:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:12,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:12,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:12,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:13,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:13,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:13,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:38:13,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:38:13,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-10-12 19:38:13,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:13,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:38:13,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:38:13,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 19:38:13,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:14,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:14,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:14,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:14,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:14,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:14,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:38:14,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:38:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:38:14,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:14,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789024821] [2020-10-12 19:38:14,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:14,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:38:14,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021339831] [2020-10-12 19:38:14,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:38:14,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:14,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:38:14,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:38:14,062 INFO L87 Difference]: Start difference. First operand 4446 states and 6714 transitions. Second operand 7 states. [2020-10-12 19:38:14,209 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:38:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:15,602 INFO L93 Difference]: Finished difference Result 12818 states and 19196 transitions. [2020-10-12 19:38:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:38:15,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 19:38:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:15,626 INFO L225 Difference]: With dead ends: 12818 [2020-10-12 19:38:15,627 INFO L226 Difference]: Without dead ends: 8436 [2020-10-12 19:38:15,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:38:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8436 states. [2020-10-12 19:38:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8436 to 4582. [2020-10-12 19:38:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4582 states. [2020-10-12 19:38:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 6898 transitions. [2020-10-12 19:38:16,552 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 6898 transitions. Word has length 69 [2020-10-12 19:38:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:16,553 INFO L479 AbstractCegarLoop]: Abstraction has 4582 states and 6898 transitions. [2020-10-12 19:38:16,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:38:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 6898 transitions. [2020-10-12 19:38:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:38:16,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:16,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:38:16,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:38:16,554 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:16,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:16,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2028396418, now seen corresponding path program 1 times [2020-10-12 19:38:16,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:16,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500421823] [2020-10-12 19:38:16,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:16,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:16,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:16,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:16,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:17,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:17,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:38:17,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:38:17,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-12 19:38:17,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:17,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:38:17,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:38:17,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:38:17,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:17,527 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:38:17,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:17,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:17,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:17,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:17,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:17,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:38:17,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:17,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:38:17,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:17,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:38:17,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:17,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500421823] [2020-10-12 19:38:17,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:17,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:38:17,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961609043] [2020-10-12 19:38:17,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:38:17,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:17,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:38:17,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:38:17,560 INFO L87 Difference]: Start difference. First operand 4582 states and 6898 transitions. Second operand 7 states. [2020-10-12 19:38:17,716 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:38:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:19,378 INFO L93 Difference]: Finished difference Result 14106 states and 21148 transitions. [2020-10-12 19:38:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:38:19,379 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 19:38:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:19,388 INFO L225 Difference]: With dead ends: 14106 [2020-10-12 19:38:19,389 INFO L226 Difference]: Without dead ends: 9636 [2020-10-12 19:38:19,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:38:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2020-10-12 19:38:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 4534. [2020-10-12 19:38:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4534 states. [2020-10-12 19:38:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 6830 transitions. [2020-10-12 19:38:20,026 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 6830 transitions. Word has length 69 [2020-10-12 19:38:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:20,027 INFO L479 AbstractCegarLoop]: Abstraction has 4534 states and 6830 transitions. [2020-10-12 19:38:20,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:38:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 6830 transitions. [2020-10-12 19:38:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:38:20,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:20,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:38:20,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:38:20,028 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:20,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:20,028 INFO L82 PathProgramCache]: Analyzing trace with hash -121981605, now seen corresponding path program 1 times [2020-10-12 19:38:20,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:20,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850034837] [2020-10-12 19:38:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:20,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:20,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:20,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:20,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:20,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:20,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:21,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:21,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:38:21,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:38:21,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-12 19:38:21,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:21,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:38:21,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:38:21,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 19:38:21,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:21,291 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:38:21,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:21,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:21,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:21,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:21,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:21,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:38:21,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:21,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:21,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:21,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:21,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:21,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850034837] [2020-10-12 19:38:21,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:21,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:38:21,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522320522] [2020-10-12 19:38:21,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:38:21,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:21,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:38:21,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:38:21,321 INFO L87 Difference]: Start difference. First operand 4534 states and 6830 transitions. Second operand 5 states. [2020-10-12 19:38:21,482 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:38:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:22,849 INFO L93 Difference]: Finished difference Result 10476 states and 15885 transitions. [2020-10-12 19:38:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:38:22,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-12 19:38:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:22,859 INFO L225 Difference]: With dead ends: 10476 [2020-10-12 19:38:22,859 INFO L226 Difference]: Without dead ends: 7278 [2020-10-12 19:38:22,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:38:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7278 states. [2020-10-12 19:38:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7278 to 7222. [2020-10-12 19:38:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7222 states. [2020-10-12 19:38:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7222 states to 7222 states and 10812 transitions. [2020-10-12 19:38:23,803 INFO L78 Accepts]: Start accepts. Automaton has 7222 states and 10812 transitions. Word has length 69 [2020-10-12 19:38:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:23,804 INFO L479 AbstractCegarLoop]: Abstraction has 7222 states and 10812 transitions. [2020-10-12 19:38:23,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:38:23,804 INFO L276 IsEmpty]: Start isEmpty. Operand 7222 states and 10812 transitions. [2020-10-12 19:38:23,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:38:23,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:23,805 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] [2020-10-12 19:38:23,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:38:23,805 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:23,805 INFO L82 PathProgramCache]: Analyzing trace with hash -893512122, now seen corresponding path program 1 times [2020-10-12 19:38:23,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:23,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81860565] [2020-10-12 19:38:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:23,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:23,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:23,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:23,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:23,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:24,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:26,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:38:26,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:38:26,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2520 [2020-10-12 19:38:26,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:38:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:38:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:38:26,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:26,539 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:38:26,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:26,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:26,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:26,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:26,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:26,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:38:26,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:38:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:38:26,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:26,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81860565] [2020-10-12 19:38:26,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:38:26,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:38:26,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290716452] [2020-10-12 19:38:26,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:38:26,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:26,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:38:26,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:38:26,570 INFO L87 Difference]: Start difference. First operand 7222 states and 10812 transitions. Second operand 7 states. [2020-10-12 19:38:26,708 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:38:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:28,758 INFO L93 Difference]: Finished difference Result 18724 states and 28276 transitions. [2020-10-12 19:38:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:38:28,759 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-12 19:38:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:28,771 INFO L225 Difference]: With dead ends: 18724 [2020-10-12 19:38:28,771 INFO L226 Difference]: Without dead ends: 12930 [2020-10-12 19:38:28,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:38:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12930 states. [2020-10-12 19:38:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12930 to 7168. [2020-10-12 19:38:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7168 states. [2020-10-12 19:38:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7168 states to 7168 states and 10739 transitions. [2020-10-12 19:38:29,644 INFO L78 Accepts]: Start accepts. Automaton has 7168 states and 10739 transitions. Word has length 70 [2020-10-12 19:38:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:29,644 INFO L479 AbstractCegarLoop]: Abstraction has 7168 states and 10739 transitions. [2020-10-12 19:38:29,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:38:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 7168 states and 10739 transitions. [2020-10-12 19:38:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 19:38:29,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:29,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:38:29,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:38:29,649 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1586734928, now seen corresponding path program 1 times [2020-10-12 19:38:29,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:29,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682413052] [2020-10-12 19:38:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:29,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:29,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:29,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:29,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:29,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:30,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:32,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:32,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:34,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:34,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 19:38:34,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:38:34,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:38:34,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:34,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:38:34,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:38:34,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 19:38:34,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:35,069 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:38:35,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:35,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:35,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:35,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:35,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:35,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:38:35,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:35,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:38:35,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:35,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:38:35,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:35,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682413052] [2020-10-12 19:38:35,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:38:35,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:38:35,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121318307] [2020-10-12 19:38:35,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:38:35,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:35,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:38:35,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:38:35,115 INFO L87 Difference]: Start difference. First operand 7168 states and 10739 transitions. Second operand 10 states. [2020-10-12 19:38:35,299 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-12 19:38:43,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:38:43,846 INFO L93 Difference]: Finished difference Result 49742 states and 73662 transitions. [2020-10-12 19:38:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:38:43,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-10-12 19:38:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:38:43,893 INFO L225 Difference]: With dead ends: 49742 [2020-10-12 19:38:43,893 INFO L226 Difference]: Without dead ends: 47094 [2020-10-12 19:38:43,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:38:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47094 states. [2020-10-12 19:38:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47094 to 19560. [2020-10-12 19:38:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19560 states. [2020-10-12 19:38:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19560 states to 19560 states and 29421 transitions. [2020-10-12 19:38:46,956 INFO L78 Accepts]: Start accepts. Automaton has 19560 states and 29421 transitions. Word has length 97 [2020-10-12 19:38:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:38:46,956 INFO L479 AbstractCegarLoop]: Abstraction has 19560 states and 29421 transitions. [2020-10-12 19:38:46,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:38:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 19560 states and 29421 transitions. [2020-10-12 19:38:46,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 19:38:46,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:38:46,964 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:38:46,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:38:46,964 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:38:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:38:46,964 INFO L82 PathProgramCache]: Analyzing trace with hash -478842247, now seen corresponding path program 1 times [2020-10-12 19:38:46,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:38:46,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087192976] [2020-10-12 19:38:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:38:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:46,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:47,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:49,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:49,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:49,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:52,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:52,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 19:38:52,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:38:52,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-12 19:38:52,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:38:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:38:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 19:38:52,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:52,329 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:38:52,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:38:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:38:52,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:38:52,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:38:52,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:38:52,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:38:52,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:38:52,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:38:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:38:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:38:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:38:52,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:38:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:38:52,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087192976] [2020-10-12 19:38:52,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:38:52,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:38:52,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312378870] [2020-10-12 19:38:52,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:38:52,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:38:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:38:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:38:52,369 INFO L87 Difference]: Start difference. First operand 19560 states and 29421 transitions. Second operand 11 states. [2020-10-12 19:38:52,558 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:39:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:02,096 INFO L93 Difference]: Finished difference Result 66680 states and 98835 transitions. [2020-10-12 19:39:02,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:39:02,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 97 [2020-10-12 19:39:02,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:02,152 INFO L225 Difference]: With dead ends: 66680 [2020-10-12 19:39:02,152 INFO L226 Difference]: Without dead ends: 47226 [2020-10-12 19:39:02,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 19:39:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47226 states. [2020-10-12 19:39:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47226 to 19560. [2020-10-12 19:39:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19560 states. [2020-10-12 19:39:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19560 states to 19560 states and 29157 transitions. [2020-10-12 19:39:05,441 INFO L78 Accepts]: Start accepts. Automaton has 19560 states and 29157 transitions. Word has length 97 [2020-10-12 19:39:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:05,441 INFO L479 AbstractCegarLoop]: Abstraction has 19560 states and 29157 transitions. [2020-10-12 19:39:05,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:39:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 19560 states and 29157 transitions. [2020-10-12 19:39:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 19:39:05,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:05,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:39:05,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:39:05,449 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:05,450 INFO L82 PathProgramCache]: Analyzing trace with hash 44805898, now seen corresponding path program 1 times [2020-10-12 19:39:05,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:05,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61847560] [2020-10-12 19:39:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:05,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:05,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:05,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:05,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:05,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:05,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:05,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:06,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:10,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:10,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:10,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 19:39:10,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:39:10,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:39:10,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:10,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:39:10,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:39:10,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 19:39:10,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:39:10,760 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2020-10-12 19:39:10,945 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:39:10,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:10,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:10,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:10,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:10,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:10,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:39:10,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:39:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:10,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:39:10,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:11,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61847560] [2020-10-12 19:39:11,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:39:11,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:39:11,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652169901] [2020-10-12 19:39:11,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:39:11,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:11,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:39:11,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:39:11,121 INFO L87 Difference]: Start difference. First operand 19560 states and 29157 transitions. Second operand 10 states. [2020-10-12 19:39:11,296 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:39:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:42,791 INFO L93 Difference]: Finished difference Result 176107 states and 261465 transitions. [2020-10-12 19:39:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 19:39:42,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 98 [2020-10-12 19:39:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:42,992 INFO L225 Difference]: With dead ends: 176107 [2020-10-12 19:39:42,992 INFO L226 Difference]: Without dead ends: 168815 [2020-10-12 19:39:43,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2020-10-12 19:39:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168815 states. [2020-10-12 19:39:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168815 to 42292. [2020-10-12 19:39:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42292 states. [2020-10-12 19:39:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42292 states to 42292 states and 63066 transitions. [2020-10-12 19:39:51,183 INFO L78 Accepts]: Start accepts. Automaton has 42292 states and 63066 transitions. Word has length 98 [2020-10-12 19:39:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:51,184 INFO L479 AbstractCegarLoop]: Abstraction has 42292 states and 63066 transitions. [2020-10-12 19:39:51,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:39:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 42292 states and 63066 transitions. [2020-10-12 19:39:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 19:39:51,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:51,193 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:39:51,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 19:39:51,193 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash 368521093, now seen corresponding path program 1 times [2020-10-12 19:39:51,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:51,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458557440] [2020-10-12 19:39:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:51,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:51,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:51,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:51,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:51,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:51,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:51,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:51,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:51,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:51,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:55,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:55,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:56,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:56,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:56,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 19:39:56,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 19:39:56,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 19:39:56,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:56,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:39:56,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:39:56,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 19:39:56,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:56,480 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:39:56,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:56,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:56,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:56,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:56,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:56,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:39:56,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:39:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:56,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:39:56,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:56,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458557440] [2020-10-12 19:39:56,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:39:56,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:39:56,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084660314] [2020-10-12 19:39:56,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:39:56,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:56,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:39:56,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:39:56,518 INFO L87 Difference]: Start difference. First operand 42292 states and 63066 transitions. Second operand 11 states. [2020-10-12 19:39:56,723 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 19:40:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:24,132 INFO L93 Difference]: Finished difference Result 166203 states and 246226 transitions. [2020-10-12 19:40:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:40:24,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 98 [2020-10-12 19:40:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:24,275 INFO L225 Difference]: With dead ends: 166203 [2020-10-12 19:40:24,276 INFO L226 Difference]: Without dead ends: 124047 [2020-10-12 19:40:24,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 19:40:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124047 states. [2020-10-12 19:40:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124047 to 42292. [2020-10-12 19:40:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42292 states. [2020-10-12 19:40:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42292 states to 42292 states and 62536 transitions. [2020-10-12 19:40:32,737 INFO L78 Accepts]: Start accepts. Automaton has 42292 states and 62536 transitions. Word has length 98 [2020-10-12 19:40:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:32,737 INFO L479 AbstractCegarLoop]: Abstraction has 42292 states and 62536 transitions. [2020-10-12 19:40:32,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:40:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 42292 states and 62536 transitions. [2020-10-12 19:40:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 19:40:32,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:32,746 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:32,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 19:40:32,746 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:32,746 INFO L82 PathProgramCache]: Analyzing trace with hash 45312797, now seen corresponding path program 1 times [2020-10-12 19:40:32,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:32,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283693491] [2020-10-12 19:40:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:32,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:32,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:32,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:32,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:33,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:33,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:34,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:34,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:34,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:37,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:37,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 19:40:37,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:40:37,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:40:37,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:37,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:40:37,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:40:37,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 19:40:37,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:38,088 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:38,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:38,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:38,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:38,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:38,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:38,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:40:38,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:38,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:38,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:38,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:38,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:38,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283693491] [2020-10-12 19:40:38,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:40:38,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:40:38,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746345593] [2020-10-12 19:40:38,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:40:38,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:38,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:40:38,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:40:38,130 INFO L87 Difference]: Start difference. First operand 42292 states and 62536 transitions. Second operand 10 states. [2020-10-12 19:40:38,440 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 139