/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:27:26,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:27:26,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:27:26,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:27:26,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:27:26,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:27:26,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:27:26,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:27:26,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:27:26,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:27:26,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:27:26,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:27:26,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:27:26,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:27:26,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:27:26,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:27:26,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:27:26,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:27:26,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:27:26,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:27:26,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:27:26,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:27:26,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:27:26,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:27:26,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:27:26,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:27:26,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:27:26,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:27:26,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:27:26,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:27:26,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:27:26,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:27:26,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:27:26,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:27:26,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:27:26,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:27:26,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:27:26,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:27:26,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:27:26,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:27:26,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:27:26,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:27:26,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:27:26,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:27:26,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:27:26,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:27:26,282 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:27:26,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:27:26,283 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:27:26,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:27:26,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:27:26,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:27:26,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:27:26,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:27:26,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:27:26,285 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:27:26,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:27:26,286 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:27:26,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:27:26,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:27:26,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:27:26,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:27:26,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:27:26,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:27:26,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:27:26,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:27:26,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:27:26,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:27:26,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:27:26,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:27:26,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:27:26,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:27:26,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:27:26,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:27:26,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:27:26,687 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:27:26,688 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:27:26,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2020-10-29 13:27:26,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25a2f68c8/bdd8eab2eee746be8bc3c77b18d82315/FLAGa2ac5c070 [2020-10-29 13:27:27,464 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:27:27,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2020-10-29 13:27:27,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25a2f68c8/bdd8eab2eee746be8bc3c77b18d82315/FLAGa2ac5c070 [2020-10-29 13:27:27,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25a2f68c8/bdd8eab2eee746be8bc3c77b18d82315 [2020-10-29 13:27:27,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:27:27,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:27:27,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:27:27,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:27:27,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:27:27,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:27:27" (1/1) ... [2020-10-29 13:27:27,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6322c519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:27, skipping insertion in model container [2020-10-29 13:27:27,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:27:27" (1/1) ... [2020-10-29 13:27:27,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:27:27,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:27:28,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:27:28,291 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:27:28,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:27:28,434 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:27:28,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:28 WrapperNode [2020-10-29 13:27:28,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:27:28,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:27:28,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:27:28,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:27:28,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:28" (1/1) ... [2020-10-29 13:27:28,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:28" (1/1) ... [2020-10-29 13:27:28,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:28" (1/1) ... [2020-10-29 13:27:28,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:28" (1/1) ... [2020-10-29 13:27:28,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:28" (1/1) ... [2020-10-29 13:27:28,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:28" (1/1) ... [2020-10-29 13:27:28,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:28" (1/1) ... [2020-10-29 13:27:28,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:27:28,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:27:28,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:27:28,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:27:28,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:27:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:27:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:27:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:27:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:27:28,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:27:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:27:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:27:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:27:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:27:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:27:28,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:27:28,687 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:27:28,687 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:27:28,687 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:27:28,687 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:27:28,687 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-29 13:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:27:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:27:28,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:27:28,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:27:28,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:27:28,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:27:28,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:27:28,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:27:28,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:27:30,022 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:27:30,022 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:27:30,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:27:30 BoogieIcfgContainer [2020-10-29 13:27:30,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:27:30,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:27:30,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:27:30,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:27:30,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:27:27" (1/3) ... [2020-10-29 13:27:30,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f67fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:27:30, skipping insertion in model container [2020-10-29 13:27:30,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:28" (2/3) ... [2020-10-29 13:27:30,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f67fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:27:30, skipping insertion in model container [2020-10-29 13:27:30,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:27:30" (3/3) ... [2020-10-29 13:27:30,034 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2020-10-29 13:27:30,045 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:27:30,051 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:27:30,063 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:27:30,089 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:27:30,089 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:27:30,089 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:27:30,089 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:27:30,090 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:27:30,090 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:27:30,090 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:27:30,090 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:27:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states. [2020-10-29 13:27:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 13:27:30,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:30,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:30,139 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:30,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash 539341397, now seen corresponding path program 1 times [2020-10-29 13:27:30,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:30,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287343592] [2020-10-29 13:27:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:30,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:30,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:31,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:31,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:31,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:31,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:31,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:32,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:35,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:35,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:35,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:35,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 13:27:35,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:27:35,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-29 13:27:35,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:35,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:35,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:35,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 13:27:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 13:27:35,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:27:35,899 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:27:35,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:35,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:35,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:35,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:35,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:35,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:27:35,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:35,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:35,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:35,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:27:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:35,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287343592] [2020-10-29 13:27:35,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:35,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:27:35,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874562758] [2020-10-29 13:27:35,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:27:35,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:36,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:27:36,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:27:36,006 INFO L87 Difference]: Start difference. First operand 263 states. Second operand 4 states. [2020-10-29 13:27:36,381 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:27:38,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:38,009 INFO L93 Difference]: Finished difference Result 555 states and 898 transitions. [2020-10-29 13:27:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:27:38,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-29 13:27:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:38,040 INFO L225 Difference]: With dead ends: 555 [2020-10-29 13:27:38,041 INFO L226 Difference]: Without dead ends: 426 [2020-10-29 13:27:38,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:27:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-29 13:27:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 415. [2020-10-29 13:27:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-10-29 13:27:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 672 transitions. [2020-10-29 13:27:38,146 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 672 transitions. Word has length 96 [2020-10-29 13:27:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:38,146 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 672 transitions. [2020-10-29 13:27:38,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:27:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 672 transitions. [2020-10-29 13:27:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-29 13:27:38,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:38,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:38,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:27:38,154 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash 28916369, now seen corresponding path program 1 times [2020-10-29 13:27:38,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:38,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042676554] [2020-10-29 13:27:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:38,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:38,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:38,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:38,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:38,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:38,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:38,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:39,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:43,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:43,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 13:27:43,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:27:43,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:27:43,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:43,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:43,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:43,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-29 13:27:43,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 13:27:43,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:27:43,619 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:27:43,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:43,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:43,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:43,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:43,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:43,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:27:43,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:43,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:43,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:43,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:43,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:43,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:27:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:43,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042676554] [2020-10-29 13:27:43,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:43,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:27:43,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574798501] [2020-10-29 13:27:43,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:27:43,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:43,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:27:43,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:27:43,684 INFO L87 Difference]: Start difference. First operand 415 states and 672 transitions. Second operand 4 states. [2020-10-29 13:27:44,029 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:27:45,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:45,369 INFO L93 Difference]: Finished difference Result 833 states and 1334 transitions. [2020-10-29 13:27:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:27:45,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-29 13:27:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:45,379 INFO L225 Difference]: With dead ends: 833 [2020-10-29 13:27:45,379 INFO L226 Difference]: Without dead ends: 676 [2020-10-29 13:27:45,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:27:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-10-29 13:27:45,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 657. [2020-10-29 13:27:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-10-29 13:27:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1054 transitions. [2020-10-29 13:27:45,445 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1054 transitions. Word has length 97 [2020-10-29 13:27:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:45,446 INFO L481 AbstractCegarLoop]: Abstraction has 657 states and 1054 transitions. [2020-10-29 13:27:45,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:27:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1054 transitions. [2020-10-29 13:27:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 13:27:45,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:45,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:45,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:27:45,457 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:45,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1563323456, now seen corresponding path program 1 times [2020-10-29 13:27:45,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:45,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220348878] [2020-10-29 13:27:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:45,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:45,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:45,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:45,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:45,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:45,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:46,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:46,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:50,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:50,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 13:27:50,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:27:50,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:27:50,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:50,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:50,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:27:50,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 13:27:50,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 13:27:50,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:50,875 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:27:50,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:50,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:50,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:50,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:50,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:50,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:27:50,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:50,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:50,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:50,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:50,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:50,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:50,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220348878] [2020-10-29 13:27:50,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:50,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:27:50,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787012416] [2020-10-29 13:27:50,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:27:50,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:50,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:27:50,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:27:50,940 INFO L87 Difference]: Start difference. First operand 657 states and 1054 transitions. Second operand 4 states. [2020-10-29 13:27:51,249 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:27:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:52,851 INFO L93 Difference]: Finished difference Result 1637 states and 2602 transitions. [2020-10-29 13:27:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:27:52,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-29 13:27:52,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:52,861 INFO L225 Difference]: With dead ends: 1637 [2020-10-29 13:27:52,862 INFO L226 Difference]: Without dead ends: 1214 [2020-10-29 13:27:52,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:27:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2020-10-29 13:27:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1179. [2020-10-29 13:27:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1179 states. [2020-10-29 13:27:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1874 transitions. [2020-10-29 13:27:52,960 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1874 transitions. Word has length 98 [2020-10-29 13:27:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:52,961 INFO L481 AbstractCegarLoop]: Abstraction has 1179 states and 1874 transitions. [2020-10-29 13:27:52,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:27:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1874 transitions. [2020-10-29 13:27:52,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:27:52,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:52,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:52,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:27:52,965 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:52,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1327533376, now seen corresponding path program 1 times [2020-10-29 13:27:52,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:52,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996870932] [2020-10-29 13:27:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:53,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:53,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:53,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:53,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:53,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:53,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:55,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:57,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:57,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:27:57,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:27:57,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:27:57,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:57,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:57,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:27:57,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:27:57,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 13:27:57,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:27:58,624 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:27:58,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:58,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:58,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:58,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:58,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:58,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 13:27:58,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:58,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:58,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:27:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:27:58,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996870932] [2020-10-29 13:27:58,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:58,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:27:58,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140126535] [2020-10-29 13:27:58,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:27:58,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:27:58,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:27:58,733 INFO L87 Difference]: Start difference. First operand 1179 states and 1874 transitions. Second operand 9 states. [2020-10-29 13:27:59,103 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-29 13:28:03,316 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:28:03,671 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:28:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:04,254 INFO L93 Difference]: Finished difference Result 6205 states and 9725 transitions. [2020-10-29 13:28:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 13:28:04,255 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 99 [2020-10-29 13:28:04,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:04,288 INFO L225 Difference]: With dead ends: 6205 [2020-10-29 13:28:04,289 INFO L226 Difference]: Without dead ends: 5578 [2020-10-29 13:28:04,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:28:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5578 states. [2020-10-29 13:28:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5578 to 3228. [2020-10-29 13:28:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3228 states. [2020-10-29 13:28:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 5081 transitions. [2020-10-29 13:28:04,587 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 5081 transitions. Word has length 99 [2020-10-29 13:28:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:04,587 INFO L481 AbstractCegarLoop]: Abstraction has 3228 states and 5081 transitions. [2020-10-29 13:28:04,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:28:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 5081 transitions. [2020-10-29 13:28:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 13:28:04,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:04,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:04,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:28:04,597 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:04,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:04,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1416633435, now seen corresponding path program 1 times [2020-10-29 13:28:04,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:04,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496879025] [2020-10-29 13:28:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:04,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:04,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:04,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:04,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:04,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:05,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:09,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:09,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-29 13:28:09,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:28:09,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:28:09,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:09,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:09,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:09,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-29 13:28:09,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:28:09,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:10,136 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:28:10,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:10,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:10,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:10,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:10,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:10,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:28:10,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:10,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:10,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:10,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:10,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:10,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:28:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:10,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496879025] [2020-10-29 13:28:10,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:10,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:28:10,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430468735] [2020-10-29 13:28:10,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:28:10,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:10,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:28:10,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:28:10,196 INFO L87 Difference]: Start difference. First operand 3228 states and 5081 transitions. Second operand 4 states. [2020-10-29 13:28:10,542 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:28:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:12,355 INFO L93 Difference]: Finished difference Result 8883 states and 13922 transitions. [2020-10-29 13:28:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:28:12,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-29 13:28:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:12,388 INFO L225 Difference]: With dead ends: 8883 [2020-10-29 13:28:12,388 INFO L226 Difference]: Without dead ends: 6230 [2020-10-29 13:28:12,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:28:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6230 states. [2020-10-29 13:28:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6230 to 6059. [2020-10-29 13:28:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6059 states. [2020-10-29 13:28:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6059 states to 6059 states and 9468 transitions. [2020-10-29 13:28:12,849 INFO L78 Accepts]: Start accepts. Automaton has 6059 states and 9468 transitions. Word has length 99 [2020-10-29 13:28:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:12,850 INFO L481 AbstractCegarLoop]: Abstraction has 6059 states and 9468 transitions. [2020-10-29 13:28:12,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:28:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 6059 states and 9468 transitions. [2020-10-29 13:28:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-29 13:28:12,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:12,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:12,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:28:12,864 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:12,865 INFO L82 PathProgramCache]: Analyzing trace with hash 893081109, now seen corresponding path program 1 times [2020-10-29 13:28:12,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:12,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794018323] [2020-10-29 13:28:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:12,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:12,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:12,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:13,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:13,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:14,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:14,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:17,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:17,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-29 13:28:17,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:28:17,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:28:17,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:17,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:17,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-29 13:28:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:28:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:18,258 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:28:18,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:18,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:18,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:18,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:18,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:18,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:28:18,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:18,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:18,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:18,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:18,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:18,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:18,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794018323] [2020-10-29 13:28:18,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:18,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:28:18,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611508382] [2020-10-29 13:28:18,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:28:18,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:18,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:28:18,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:28:18,316 INFO L87 Difference]: Start difference. First operand 6059 states and 9468 transitions. Second operand 4 states. [2020-10-29 13:28:18,643 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:28:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:20,418 INFO L93 Difference]: Finished difference Result 15497 states and 24164 transitions. [2020-10-29 13:28:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:28:20,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-29 13:28:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:20,481 INFO L225 Difference]: With dead ends: 15497 [2020-10-29 13:28:20,481 INFO L226 Difference]: Without dead ends: 11394 [2020-10-29 13:28:20,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:28:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2020-10-29 13:28:21,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 10991. [2020-10-29 13:28:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10991 states. [2020-10-29 13:28:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10991 states to 10991 states and 17008 transitions. [2020-10-29 13:28:21,410 INFO L78 Accepts]: Start accepts. Automaton has 10991 states and 17008 transitions. Word has length 100 [2020-10-29 13:28:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:21,411 INFO L481 AbstractCegarLoop]: Abstraction has 10991 states and 17008 transitions. [2020-10-29 13:28:21,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:28:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 10991 states and 17008 transitions. [2020-10-29 13:28:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 13:28:21,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:21,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:21,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:28:21,437 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:21,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1740068730, now seen corresponding path program 1 times [2020-10-29 13:28:21,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:21,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847133985] [2020-10-29 13:28:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:21,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:21,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:21,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:21,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:22,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:26,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:26,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 13:28:26,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:28:26,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:28:26,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:26,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:26,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 13:28:26,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:28:26,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:26,819 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:28:26,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:26,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:26,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:26,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:26,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:26,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:28:26,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:26,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:26,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:26,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:26,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:26,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:26,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847133985] [2020-10-29 13:28:26,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:26,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:28:26,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545635129] [2020-10-29 13:28:26,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:28:26,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:26,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:28:26,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:28:26,876 INFO L87 Difference]: Start difference. First operand 10991 states and 17008 transitions. Second operand 4 states. [2020-10-29 13:28:27,224 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-29 13:28:29,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:29,314 INFO L93 Difference]: Finished difference Result 27317 states and 42148 transitions. [2020-10-29 13:28:29,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:28:29,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-29 13:28:29,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:29,362 INFO L225 Difference]: With dead ends: 27317 [2020-10-29 13:28:29,362 INFO L226 Difference]: Without dead ends: 20538 [2020-10-29 13:28:29,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:28:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20538 states. [2020-10-29 13:28:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20538 to 19735. [2020-10-29 13:28:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19735 states. [2020-10-29 13:28:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19735 states to 19735 states and 30176 transitions. [2020-10-29 13:28:30,626 INFO L78 Accepts]: Start accepts. Automaton has 19735 states and 30176 transitions. Word has length 101 [2020-10-29 13:28:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:30,627 INFO L481 AbstractCegarLoop]: Abstraction has 19735 states and 30176 transitions. [2020-10-29 13:28:30,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:28:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 19735 states and 30176 transitions. [2020-10-29 13:28:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-29 13:28:30,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:30,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:30,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:28:30,682 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1168917924, now seen corresponding path program 1 times [2020-10-29 13:28:30,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:30,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031144902] [2020-10-29 13:28:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:30,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:30,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:30,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:32,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:32,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 13:28:32,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:28:32,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1636 [2020-10-29 13:28:32,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:32,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:28:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-29 13:28:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:28:32,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:32,702 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:28:32,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:32,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:32,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:32,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:32,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:32,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:28:32,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:32,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:32,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:32,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031144902] [2020-10-29 13:28:32,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:32,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:28:32,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982149071] [2020-10-29 13:28:32,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:28:32,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:32,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:28:32,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:28:32,747 INFO L87 Difference]: Start difference. First operand 19735 states and 30176 transitions. Second operand 5 states. [2020-10-29 13:28:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:34,741 INFO L93 Difference]: Finished difference Result 29194 states and 44354 transitions. [2020-10-29 13:28:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:28:34,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-29 13:28:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:34,784 INFO L225 Difference]: With dead ends: 29194 [2020-10-29 13:28:34,784 INFO L226 Difference]: Without dead ends: 19735 [2020-10-29 13:28:34,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:28:34,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19735 states. [2020-10-29 13:28:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19735 to 19735. [2020-10-29 13:28:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19735 states. [2020-10-29 13:28:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19735 states to 19735 states and 29552 transitions. [2020-10-29 13:28:35,807 INFO L78 Accepts]: Start accepts. Automaton has 19735 states and 29552 transitions. Word has length 102 [2020-10-29 13:28:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:35,808 INFO L481 AbstractCegarLoop]: Abstraction has 19735 states and 29552 transitions. [2020-10-29 13:28:35,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:28:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 19735 states and 29552 transitions. [2020-10-29 13:28:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-29 13:28:35,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:35,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:35,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:28:35,847 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:35,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:35,848 INFO L82 PathProgramCache]: Analyzing trace with hash 761049889, now seen corresponding path program 1 times [2020-10-29 13:28:35,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:35,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884746257] [2020-10-29 13:28:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:35,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:36,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:36,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:36,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:37,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:38,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:38,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 13:28:38,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:28:38,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2394 [2020-10-29 13:28:38,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:38,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:38,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:38,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-29 13:28:38,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:28:38,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:38,630 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:28:38,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:38,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:38,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:38,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:38,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:38,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:28:38,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:38,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:38,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:38,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:38,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:38,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:38,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884746257] [2020-10-29 13:28:38,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:38,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:28:38,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141760654] [2020-10-29 13:28:38,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:28:38,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:38,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:28:38,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:28:38,681 INFO L87 Difference]: Start difference. First operand 19735 states and 29552 transitions. Second operand 4 states. [2020-10-29 13:28:41,461 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:28:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:42,205 INFO L93 Difference]: Finished difference Result 45261 states and 67252 transitions. [2020-10-29 13:28:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:28:42,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2020-10-29 13:28:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:42,258 INFO L225 Difference]: With dead ends: 45261 [2020-10-29 13:28:42,258 INFO L226 Difference]: Without dead ends: 33128 [2020-10-29 13:28:42,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:28:42,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33128 states. [2020-10-29 13:28:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33128 to 33119. [2020-10-29 13:28:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33119 states. [2020-10-29 13:28:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33119 states to 33119 states and 48576 transitions. [2020-10-29 13:28:44,145 INFO L78 Accepts]: Start accepts. Automaton has 33119 states and 48576 transitions. Word has length 104 [2020-10-29 13:28:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:44,146 INFO L481 AbstractCegarLoop]: Abstraction has 33119 states and 48576 transitions. [2020-10-29 13:28:44,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:28:44,146 INFO L276 IsEmpty]: Start isEmpty. Operand 33119 states and 48576 transitions. [2020-10-29 13:28:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-29 13:28:44,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:44,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:44,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:28:44,180 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:44,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1158997454, now seen corresponding path program 1 times [2020-10-29 13:28:44,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:44,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227120373] [2020-10-29 13:28:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:44,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:44,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:44,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:44,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:44,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:44,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:44,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:45,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:45,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 13:28:45,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:28:45,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1385 [2020-10-29 13:28:45,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:45,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:45,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:45,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-29 13:28:45,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:28:45,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:45,912 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:28:45,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:45,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:45,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:45,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:45,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:45,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:28:45,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:45,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:45,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:45,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:45,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:45,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:45,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227120373] [2020-10-29 13:28:45,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:45,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:28:45,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983369639] [2020-10-29 13:28:45,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:28:45,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:45,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:28:45,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:28:45,958 INFO L87 Difference]: Start difference. First operand 33119 states and 48576 transitions. Second operand 4 states. [2020-10-29 13:28:46,384 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:28:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:50,031 INFO L93 Difference]: Finished difference Result 60157 states and 88553 transitions. [2020-10-29 13:28:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:28:50,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-29 13:28:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:50,095 INFO L225 Difference]: With dead ends: 60157 [2020-10-29 13:28:50,095 INFO L226 Difference]: Without dead ends: 43706 [2020-10-29 13:28:50,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:28:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43706 states. [2020-10-29 13:28:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43706 to 38514. [2020-10-29 13:28:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38514 states. [2020-10-29 13:28:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38514 states to 38514 states and 56330 transitions. [2020-10-29 13:28:52,645 INFO L78 Accepts]: Start accepts. Automaton has 38514 states and 56330 transitions. Word has length 106 [2020-10-29 13:28:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:52,645 INFO L481 AbstractCegarLoop]: Abstraction has 38514 states and 56330 transitions. [2020-10-29 13:28:52,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:28:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 38514 states and 56330 transitions. [2020-10-29 13:28:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-29 13:28:52,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:52,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:52,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:28:52,833 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:52,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2038148812, now seen corresponding path program 1 times [2020-10-29 13:28:52,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:52,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846992401] [2020-10-29 13:28:52,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:52,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:52,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:52,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:53,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:53,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:53,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:53,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-29 13:28:53,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:28:53,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 765 [2020-10-29 13:28:53,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:53,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:53,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:53,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-29 13:28:53,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:28:53,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:28:53,980 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:28:53,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:53,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:54,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:54,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:54,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:54,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:28:54,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:54,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:54,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:54,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:54,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:54,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:54,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846992401] [2020-10-29 13:28:54,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:54,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:28:54,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371195624] [2020-10-29 13:28:54,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:28:54,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:54,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:28:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:28:54,030 INFO L87 Difference]: Start difference. First operand 38514 states and 56330 transitions. Second operand 4 states. [2020-10-29 13:28:54,370 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-29 13:28:59,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:59,286 INFO L93 Difference]: Finished difference Result 88944 states and 129930 transitions. [2020-10-29 13:28:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:28:59,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-29 13:28:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:59,357 INFO L225 Difference]: With dead ends: 88944 [2020-10-29 13:28:59,358 INFO L226 Difference]: Without dead ends: 57834 [2020-10-29 13:28:59,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:28:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57834 states. [2020-10-29 13:29:02,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57834 to 57823. [2020-10-29 13:29:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57823 states. [2020-10-29 13:29:03,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57823 states to 57823 states and 83484 transitions. [2020-10-29 13:29:03,031 INFO L78 Accepts]: Start accepts. Automaton has 57823 states and 83484 transitions. Word has length 108 [2020-10-29 13:29:03,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:03,031 INFO L481 AbstractCegarLoop]: Abstraction has 57823 states and 83484 transitions. [2020-10-29 13:29:03,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:29:03,031 INFO L276 IsEmpty]: Start isEmpty. Operand 57823 states and 83484 transitions. [2020-10-29 13:29:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 13:29:03,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:03,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:03,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:29:03,097 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:03,097 INFO L82 PathProgramCache]: Analyzing trace with hash -940876249, now seen corresponding path program 1 times [2020-10-29 13:29:03,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:03,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316320910] [2020-10-29 13:29:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:03,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:03,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:03,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:03,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:06,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:06,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-29 13:29:06,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:29:06,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3844 [2020-10-29 13:29:06,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:06,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:29:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:29:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:29:06,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:07,298 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:29:07,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:07,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:07,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:07,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:07,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:07,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:29:07,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:07,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:07,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316320910] [2020-10-29 13:29:07,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:07,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:29:07,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957655682] [2020-10-29 13:29:07,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:29:07,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:29:07,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:29:07,330 INFO L87 Difference]: Start difference. First operand 57823 states and 83484 transitions. Second operand 6 states. [2020-10-29 13:29:13,624 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-29 13:29:13,966 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-29 13:29:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:16,365 INFO L93 Difference]: Finished difference Result 163372 states and 236134 transitions. [2020-10-29 13:29:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:29:16,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-10-29 13:29:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:16,516 INFO L225 Difference]: With dead ends: 163372 [2020-10-29 13:29:16,516 INFO L226 Difference]: Without dead ends: 110457 [2020-10-29 13:29:16,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:29:16,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110457 states. [2020-10-29 13:29:20,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110457 to 58719. [2020-10-29 13:29:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58719 states. [2020-10-29 13:29:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58719 states to 58719 states and 83907 transitions. [2020-10-29 13:29:20,984 INFO L78 Accepts]: Start accepts. Automaton has 58719 states and 83907 transitions. Word has length 109 [2020-10-29 13:29:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:20,984 INFO L481 AbstractCegarLoop]: Abstraction has 58719 states and 83907 transitions. [2020-10-29 13:29:20,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:29:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 58719 states and 83907 transitions. [2020-10-29 13:29:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 13:29:21,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:21,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:21,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:29:21,028 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1633274886, now seen corresponding path program 1 times [2020-10-29 13:29:21,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:21,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641433556] [2020-10-29 13:29:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:21,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:21,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:21,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:21,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:24,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:24,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-29 13:29:24,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:29:24,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3370 [2020-10-29 13:29:24,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:24,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:29:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:29:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:29:24,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:24,796 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:29:24,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:24,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:24,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:24,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:24,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:24,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:29:24,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:24,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:24,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641433556] [2020-10-29 13:29:24,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:24,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:29:24,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935465042] [2020-10-29 13:29:24,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:29:24,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:24,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:29:24,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:29:24,842 INFO L87 Difference]: Start difference. First operand 58719 states and 83907 transitions. Second operand 6 states. [2020-10-29 13:29:31,261 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-29 13:29:31,635 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-29 13:29:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:34,327 INFO L93 Difference]: Finished difference Result 158501 states and 226915 transitions. [2020-10-29 13:29:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:29:34,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-10-29 13:29:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:34,601 INFO L225 Difference]: With dead ends: 158501 [2020-10-29 13:29:34,601 INFO L226 Difference]: Without dead ends: 106163 [2020-10-29 13:29:34,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:29:34,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106163 states. [2020-10-29 13:29:39,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106163 to 59216. [2020-10-29 13:29:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59216 states. [2020-10-29 13:29:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59216 states to 59216 states and 83781 transitions. [2020-10-29 13:29:39,324 INFO L78 Accepts]: Start accepts. Automaton has 59216 states and 83781 transitions. Word has length 109 [2020-10-29 13:29:39,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:39,324 INFO L481 AbstractCegarLoop]: Abstraction has 59216 states and 83781 transitions. [2020-10-29 13:29:39,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:29:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 59216 states and 83781 transitions. [2020-10-29 13:29:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 13:29:39,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:39,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:39,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:29:39,363 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:39,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1031860580, now seen corresponding path program 1 times [2020-10-29 13:29:39,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:39,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228189231] [2020-10-29 13:29:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:39,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:39,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:39,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:39,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:41,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:44,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:44,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-29 13:29:44,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:29:44,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4701 [2020-10-29 13:29:44,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:44,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:44,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:44,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-29 13:29:44,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:29:44,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:44,404 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:29:44,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:44,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:44,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:44,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:44,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:44,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:29:44,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:44,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:44,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:44,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228189231] [2020-10-29 13:29:44,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:44,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:29:44,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903845098] [2020-10-29 13:29:44,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:29:44,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:44,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:29:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:29:44,439 INFO L87 Difference]: Start difference. First operand 59216 states and 83781 transitions. Second operand 4 states. [2020-10-29 13:29:44,769 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-29 13:29:53,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:53,310 INFO L93 Difference]: Finished difference Result 141726 states and 200651 transitions. [2020-10-29 13:29:53,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:29:53,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-29 13:29:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:53,422 INFO L225 Difference]: With dead ends: 141726 [2020-10-29 13:29:53,422 INFO L226 Difference]: Without dead ends: 107365 [2020-10-29 13:29:53,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:29:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107365 states. [2020-10-29 13:30:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107365 to 107362. [2020-10-29 13:30:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107362 states. [2020-10-29 13:30:02,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107362 states to 107362 states and 151049 transitions. [2020-10-29 13:30:02,132 INFO L78 Accepts]: Start accepts. Automaton has 107362 states and 151049 transitions. Word has length 109 [2020-10-29 13:30:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:02,133 INFO L481 AbstractCegarLoop]: Abstraction has 107362 states and 151049 transitions. [2020-10-29 13:30:02,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:30:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 107362 states and 151049 transitions. [2020-10-29 13:30:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 13:30:02,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:02,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:02,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:30:02,215 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1867063071, now seen corresponding path program 1 times [2020-10-29 13:30:02,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:02,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205447533] [2020-10-29 13:30:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:02,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:02,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:02,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:02,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:05,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:05,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-29 13:30:05,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:30:05,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3386 [2020-10-29 13:30:05,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:05,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:05,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:30:05,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:30:05,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:30:05,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:05,954 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:30:05,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:05,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:05,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:05,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:05,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:05,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:30:05,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:05,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:05,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:05,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:05,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:05,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:05,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205447533] [2020-10-29 13:30:05,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:05,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:30:05,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352342885] [2020-10-29 13:30:05,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:30:05,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:05,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:30:05,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:30:05,993 INFO L87 Difference]: Start difference. First operand 107362 states and 151049 transitions. Second operand 6 states. [2020-10-29 13:30:17,197 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-29 13:30:17,648 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-29 13:30:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:23,949 INFO L93 Difference]: Finished difference Result 286543 states and 403460 transitions. [2020-10-29 13:30:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:30:23,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-10-29 13:30:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:24,376 INFO L225 Difference]: With dead ends: 286543 [2020-10-29 13:30:24,376 INFO L226 Difference]: Without dead ends: 189611 [2020-10-29 13:30:24,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:30:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189611 states. [2020-10-29 13:30:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189611 to 106548. [2020-10-29 13:30:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106548 states. [2020-10-29 13:30:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106548 states to 106548 states and 148379 transitions. [2020-10-29 13:30:33,961 INFO L78 Accepts]: Start accepts. Automaton has 106548 states and 148379 transitions. Word has length 109 [2020-10-29 13:30:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:33,961 INFO L481 AbstractCegarLoop]: Abstraction has 106548 states and 148379 transitions. [2020-10-29 13:30:33,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:30:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 106548 states and 148379 transitions. [2020-10-29 13:30:34,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 13:30:34,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:34,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:34,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:30:34,041 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:34,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1028525766, now seen corresponding path program 1 times [2020-10-29 13:30:34,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:34,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083752317] [2020-10-29 13:30:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:34,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:34,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:34,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:34,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:34,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-29 13:30:34,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:30:34,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-29 13:30:34,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:34,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:34,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:34,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-29 13:30:34,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:30:34,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:35,341 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:30:35,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:35,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:35,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:35,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:35,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:35,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:30:35,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:35,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:35,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:35,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:35,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:35,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:35,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083752317] [2020-10-29 13:30:35,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:35,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:30:35,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272672726] [2020-10-29 13:30:35,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:30:35,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:35,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:30:35,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:30:35,395 INFO L87 Difference]: Start difference. First operand 106548 states and 148379 transitions. Second operand 4 states. [2020-10-29 13:30:43,704 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-29 13:30:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:46,939 INFO L93 Difference]: Finished difference Result 204775 states and 286149 transitions. [2020-10-29 13:30:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:30:46,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-29 13:30:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:47,101 INFO L225 Difference]: With dead ends: 204775 [2020-10-29 13:30:47,101 INFO L226 Difference]: Without dead ends: 122468 [2020-10-29 13:30:47,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:30:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122468 states. [2020-10-29 13:30:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122468 to 122465. [2020-10-29 13:30:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122465 states. [2020-10-29 13:30:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122465 states to 122465 states and 169445 transitions. [2020-10-29 13:30:57,522 INFO L78 Accepts]: Start accepts. Automaton has 122465 states and 169445 transitions. Word has length 109 [2020-10-29 13:30:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:57,522 INFO L481 AbstractCegarLoop]: Abstraction has 122465 states and 169445 transitions. [2020-10-29 13:30:57,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:30:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 122465 states and 169445 transitions. [2020-10-29 13:30:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 13:30:57,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:57,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:57,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:30:57,612 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:57,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1646422250, now seen corresponding path program 1 times [2020-10-29 13:30:57,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:57,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974009489] [2020-10-29 13:30:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:57,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:57,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:58,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:58,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:58,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-29 13:30:58,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:30:58,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-10-29 13:30:58,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:58,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:58,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:30:58,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-29 13:30:58,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:30:58,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:59,108 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:30:59,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:59,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:59,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:59,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:59,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:59,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:30:59,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:59,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:59,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:59,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974009489] [2020-10-29 13:30:59,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:59,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:30:59,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453893605] [2020-10-29 13:30:59,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:30:59,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:59,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:30:59,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:30:59,144 INFO L87 Difference]: Start difference. First operand 122465 states and 169445 transitions. Second operand 4 states.