/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:18:37,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:18:37,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:18:37,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:18:37,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:18:37,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:18:37,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:18:37,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:18:37,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:18:37,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:18:37,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:18:37,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:18:37,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:18:37,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:18:37,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:18:37,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:18:37,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:18:37,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:18:37,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:18:37,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:18:37,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:18:37,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:18:37,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:18:37,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:18:37,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:18:37,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:18:37,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:18:37,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:18:37,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:18:37,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:18:37,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:18:37,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:18:37,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:18:37,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:18:37,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:18:37,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:18:37,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:18:37,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:18:37,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:18:37,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:18:37,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:18:37,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:18:37,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:18:37,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:18:37,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:18:37,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:18:37,310 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:18:37,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:18:37,310 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:18:37,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:18:37,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:18:37,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:18:37,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:18:37,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:18:37,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:18:37,313 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:18:37,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:18:37,313 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:18:37,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:18:37,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:18:37,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:18:37,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:18:37,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:18:37,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:18:37,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:18:37,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:18:37,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:18:37,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:18:37,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:18:37,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:18:37,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:18:37,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:18:37,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:18:37,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:18:37,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:18:37,774 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:18:37,775 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:18:37,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:18:37,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6808d1b32/147cb452f52d478198bac2eeef9688c8/FLAG815598daf [2020-10-28 00:18:38,868 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:18:38,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:18:38,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6808d1b32/147cb452f52d478198bac2eeef9688c8/FLAG815598daf [2020-10-28 00:18:38,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6808d1b32/147cb452f52d478198bac2eeef9688c8 [2020-10-28 00:18:38,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:18:38,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:18:38,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:18:38,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:18:38,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:18:38,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:18:38" (1/1) ... [2020-10-28 00:18:38,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72327dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:38, skipping insertion in model container [2020-10-28 00:18:38,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:18:38" (1/1) ... [2020-10-28 00:18:38,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:18:39,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:18:40,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:18:40,568 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:18:41,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:18:41,228 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:18:41,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:41 WrapperNode [2020-10-28 00:18:41,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:18:41,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:18:41,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:18:41,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:18:41,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:41" (1/1) ... [2020-10-28 00:18:41,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:41" (1/1) ... [2020-10-28 00:18:41,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:41" (1/1) ... [2020-10-28 00:18:41,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:41" (1/1) ... [2020-10-28 00:18:41,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:41" (1/1) ... [2020-10-28 00:18:41,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:41" (1/1) ... [2020-10-28 00:18:41,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:41" (1/1) ... [2020-10-28 00:18:41,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:18:41,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:18:41,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:18:41,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:18:41,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:18:41,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:18:41,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:18:41,652 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:18:41,652 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:18:41,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:18:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:18:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:18:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:18:41,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:18:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:18:41,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:18:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:18:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:18:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:18:41,655 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:18:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:18:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:18:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:18:41,656 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:18:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:18:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:18:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:18:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:18:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:18:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:18:41,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:18:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:18:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:18:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:18:41,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:18:47,378 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:18:47,378 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:18:47,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:47 BoogieIcfgContainer [2020-10-28 00:18:47,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:18:47,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:18:47,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:18:47,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:18:47,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:18:38" (1/3) ... [2020-10-28 00:18:47,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56be1815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:47, skipping insertion in model container [2020-10-28 00:18:47,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:41" (2/3) ... [2020-10-28 00:18:47,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56be1815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:47, skipping insertion in model container [2020-10-28 00:18:47,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:47" (3/3) ... [2020-10-28 00:18:47,421 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:18:47,436 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:18:47,443 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:18:47,461 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:18:47,519 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:18:47,519 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:18:47,519 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:18:47,519 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:18:47,519 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:18:47,519 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:18:47,520 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:18:47,520 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:18:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states. [2020-10-28 00:18:47,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 00:18:47,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:47,620 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] [2020-10-28 00:18:47,620 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash -634912560, now seen corresponding path program 1 times [2020-10-28 00:18:47,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:47,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370991780] [2020-10-28 00:18:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:48,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:48,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:49,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:49,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:50,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:50,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:53,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:53,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 00:18:53,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:18:53,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 00:18:53,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:53,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:18:53,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:18:53,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:18:53,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:18:56,498 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 00:18:56,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:56,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:56,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:56,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:56,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:56,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 00:18:56,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:56,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:56,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:56,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:56,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:56,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370991780] [2020-10-28 00:18:56,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:56,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:18:56,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031021540] [2020-10-28 00:18:56,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:18:56,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:56,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:18:56,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:18:56,657 INFO L87 Difference]: Start difference. First operand 1760 states. Second operand 7 states. [2020-10-28 00:18:59,509 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 00:19:20,329 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-28 00:19:23,182 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 00:19:25,808 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:19:28,440 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 651 [2020-10-28 00:19:32,758 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification that was a NOOP. DAG size: 651 [2020-10-28 00:19:35,322 WARN L193 SmtUtils]: Spent 2.51 s on a formula simplification that was a NOOP. DAG size: 652 [2020-10-28 00:19:37,920 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 00:19:40,861 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 654 [2020-10-28 00:19:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:40,919 INFO L93 Difference]: Finished difference Result 4734 states and 8277 transitions. [2020-10-28 00:19:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:19:40,922 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-28 00:19:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:40,993 INFO L225 Difference]: With dead ends: 4734 [2020-10-28 00:19:40,993 INFO L226 Difference]: Without dead ends: 3014 [2020-10-28 00:19:41,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:19:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2020-10-28 00:19:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 2700. [2020-10-28 00:19:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2700 states. [2020-10-28 00:19:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 3821 transitions. [2020-10-28 00:19:41,219 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 3821 transitions. Word has length 80 [2020-10-28 00:19:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:41,220 INFO L481 AbstractCegarLoop]: Abstraction has 2700 states and 3821 transitions. [2020-10-28 00:19:41,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:19:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 3821 transitions. [2020-10-28 00:19:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:19:41,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:41,229 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] [2020-10-28 00:19:41,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:19:41,229 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:41,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:41,230 INFO L82 PathProgramCache]: Analyzing trace with hash 834403514, now seen corresponding path program 1 times [2020-10-28 00:19:41,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:41,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688882231] [2020-10-28 00:19:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:41,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:41,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:42,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:42,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:42,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:44,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:46,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:46,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:19:46,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:19:46,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 00:19:46,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:19:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 00:19:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:19:46,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:49,046 WARN L193 SmtUtils]: Spent 2.57 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 00:19:49,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:49,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:49,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:49,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:49,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:49,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 00:19:49,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:49,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:49,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:49,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:49,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:49,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688882231] [2020-10-28 00:19:49,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:49,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:19:49,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655898305] [2020-10-28 00:19:49,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:19:49,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:19:49,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:19:49,150 INFO L87 Difference]: Start difference. First operand 2700 states and 3821 transitions. Second operand 4 states. [2020-10-28 00:19:51,896 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 00:20:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:04,377 INFO L93 Difference]: Finished difference Result 5074 states and 7474 transitions. [2020-10-28 00:20:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:20:04,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 00:20:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:04,397 INFO L225 Difference]: With dead ends: 5074 [2020-10-28 00:20:04,397 INFO L226 Difference]: Without dead ends: 3716 [2020-10-28 00:20:04,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:20:04,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2020-10-28 00:20:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3698. [2020-10-28 00:20:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3698 states. [2020-10-28 00:20:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 5336 transitions. [2020-10-28 00:20:04,535 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 5336 transitions. Word has length 81 [2020-10-28 00:20:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:04,538 INFO L481 AbstractCegarLoop]: Abstraction has 3698 states and 5336 transitions. [2020-10-28 00:20:04,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:20:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 5336 transitions. [2020-10-28 00:20:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:20:04,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:04,545 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] [2020-10-28 00:20:04,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:20:04,546 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1527136135, now seen corresponding path program 1 times [2020-10-28 00:20:04,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:04,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901083873] [2020-10-28 00:20:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:04,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:04,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:05,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:06,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:06,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:09,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:09,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:20:09,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:20:09,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 00:20:09,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:20:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 00:20:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:20:09,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:12,285 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 00:20:12,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:12,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:12,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:12,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:12,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:12,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-28 00:20:12,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:12,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:12,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901083873] [2020-10-28 00:20:12,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:12,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:20:12,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061938182] [2020-10-28 00:20:12,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:20:12,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:12,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:20:12,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:20:12,437 INFO L87 Difference]: Start difference. First operand 3698 states and 5336 transitions. Second operand 4 states. [2020-10-28 00:20:15,178 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-28 00:20:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:27,593 INFO L93 Difference]: Finished difference Result 7602 states and 11291 transitions. [2020-10-28 00:20:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:20:27,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 00:20:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:27,621 INFO L225 Difference]: With dead ends: 7602 [2020-10-28 00:20:27,621 INFO L226 Difference]: Without dead ends: 5534 [2020-10-28 00:20:27,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:20:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5534 states. [2020-10-28 00:20:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5534 to 5527. [2020-10-28 00:20:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5527 states. [2020-10-28 00:20:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 8041 transitions. [2020-10-28 00:20:27,893 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 8041 transitions. Word has length 81 [2020-10-28 00:20:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:27,900 INFO L481 AbstractCegarLoop]: Abstraction has 5527 states and 8041 transitions. [2020-10-28 00:20:27,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:20:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 8041 transitions. [2020-10-28 00:20:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:20:27,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:27,912 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] [2020-10-28 00:20:27,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:20:27,913 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:27,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2121449534, now seen corresponding path program 1 times [2020-10-28 00:20:27,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:27,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61075135] [2020-10-28 00:20:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:28,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:28,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:28,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:30,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:30,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:31,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:33,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:33,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:20:33,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:20:33,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 00:20:33,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:33,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:20:33,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 00:20:33,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 00:20:33,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:36,022 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 00:20:36,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:36,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:36,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:36,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:36,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:36,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 00:20:36,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:36,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:36,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:36,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61075135] [2020-10-28 00:20:36,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:36,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:20:36,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127884625] [2020-10-28 00:20:36,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:20:36,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:36,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:20:36,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:20:36,120 INFO L87 Difference]: Start difference. First operand 5527 states and 8041 transitions. Second operand 4 states. [2020-10-28 00:20:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:49,291 INFO L93 Difference]: Finished difference Result 7571 states and 11237 transitions. [2020-10-28 00:20:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:20:49,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 00:20:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:49,329 INFO L225 Difference]: With dead ends: 7571 [2020-10-28 00:20:49,329 INFO L226 Difference]: Without dead ends: 7568 [2020-10-28 00:20:49,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:20:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2020-10-28 00:20:49,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 5526. [2020-10-28 00:20:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5526 states. [2020-10-28 00:20:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 8020 transitions. [2020-10-28 00:20:49,580 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 8020 transitions. Word has length 81 [2020-10-28 00:20:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:49,581 INFO L481 AbstractCegarLoop]: Abstraction has 5526 states and 8020 transitions. [2020-10-28 00:20:49,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:20:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 8020 transitions. [2020-10-28 00:20:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:20:49,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:49,590 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] [2020-10-28 00:20:49,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:20:49,591 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:49,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1450432593, now seen corresponding path program 1 times [2020-10-28 00:20:49,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:49,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282963887] [2020-10-28 00:20:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:49,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:49,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:49,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:51,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:52,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:54,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:54,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:20:54,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:20:54,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4481 [2020-10-28 00:20:54,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:20:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 00:20:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 00:20:54,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:57,080 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 00:20:57,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:57,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:57,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:57,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:57,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:57,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:20:57,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:57,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:57,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:57,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:57,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:57,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282963887] [2020-10-28 00:20:57,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:57,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:20:57,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828735134] [2020-10-28 00:20:57,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:20:57,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:57,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:20:57,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:20:57,169 INFO L87 Difference]: Start difference. First operand 5526 states and 8020 transitions. Second operand 4 states. [2020-10-28 00:21:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:21:09,792 INFO L93 Difference]: Finished difference Result 7570 states and 11216 transitions. [2020-10-28 00:21:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:21:09,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 00:21:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:21:09,827 INFO L225 Difference]: With dead ends: 7570 [2020-10-28 00:21:09,827 INFO L226 Difference]: Without dead ends: 7567 [2020-10-28 00:21:09,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:21:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7567 states. [2020-10-28 00:21:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7567 to 5525. [2020-10-28 00:21:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5525 states. [2020-10-28 00:21:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5525 states to 5525 states and 8007 transitions. [2020-10-28 00:21:10,077 INFO L78 Accepts]: Start accepts. Automaton has 5525 states and 8007 transitions. Word has length 81 [2020-10-28 00:21:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:21:10,077 INFO L481 AbstractCegarLoop]: Abstraction has 5525 states and 8007 transitions. [2020-10-28 00:21:10,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:21:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 5525 states and 8007 transitions. [2020-10-28 00:21:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:21:10,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:21:10,087 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] [2020-10-28 00:21:10,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:21:10,087 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:21:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:21:10,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1042905222, now seen corresponding path program 1 times [2020-10-28 00:21:10,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:21:10,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127631229] [2020-10-28 00:21:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:21:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:10,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:10,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:10,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:11,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:14,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:15,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:15,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:21:15,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:21:15,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:21:15,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:21:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 00:21:15,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 00:21:15,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:17,887 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 00:21:17,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:21:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:17,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:17,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:17,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:21:17,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:21:17,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-28 00:21:17,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:17,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:21:17,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:21:17,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:21:17,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:21:18,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127631229] [2020-10-28 00:21:18,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:21:18,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:21:18,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203991579] [2020-10-28 00:21:18,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:21:18,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:21:18,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:21:18,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:21:18,027 INFO L87 Difference]: Start difference. First operand 5525 states and 8007 transitions. Second operand 4 states. [2020-10-28 00:21:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:21:30,449 INFO L93 Difference]: Finished difference Result 7569 states and 11203 transitions. [2020-10-28 00:21:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:21:30,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 00:21:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:21:30,481 INFO L225 Difference]: With dead ends: 7569 [2020-10-28 00:21:30,481 INFO L226 Difference]: Without dead ends: 7566 [2020-10-28 00:21:30,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:21:30,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7566 states. [2020-10-28 00:21:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7566 to 5524. [2020-10-28 00:21:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5524 states. [2020-10-28 00:21:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 7986 transitions. [2020-10-28 00:21:30,816 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 7986 transitions. Word has length 81 [2020-10-28 00:21:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:21:30,816 INFO L481 AbstractCegarLoop]: Abstraction has 5524 states and 7986 transitions. [2020-10-28 00:21:30,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:21:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 7986 transitions. [2020-10-28 00:21:30,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:21:30,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:21:30,826 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] [2020-10-28 00:21:30,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:21:30,826 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:21:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:21:30,827 INFO L82 PathProgramCache]: Analyzing trace with hash -300066912, now seen corresponding path program 1 times [2020-10-28 00:21:30,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:21:30,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502454622] [2020-10-28 00:21:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:21:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:30,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:31,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:31,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:32,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:32,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:32,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:32,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:35,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:35,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:21:35,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:21:35,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:21:35,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:35,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:21:35,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:21:35,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:21:35,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:38,692 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 00:21:38,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:21:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:38,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:38,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:38,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:21:38,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:21:38,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:21:38,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:21:38,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:21:38,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:21:38,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:21:38,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502454622] [2020-10-28 00:21:38,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:21:38,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:21:38,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176654884] [2020-10-28 00:21:38,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:21:38,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:21:38,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:21:38,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:21:38,756 INFO L87 Difference]: Start difference. First operand 5524 states and 7986 transitions. Second operand 6 states. [2020-10-28 00:21:53,890 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 651 [2020-10-28 00:21:58,256 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:21:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:21:58,602 INFO L93 Difference]: Finished difference Result 15580 states and 23571 transitions. [2020-10-28 00:21:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:21:58,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-28 00:21:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:21:58,632 INFO L225 Difference]: With dead ends: 15580 [2020-10-28 00:21:58,633 INFO L226 Difference]: Without dead ends: 13472 [2020-10-28 00:21:58,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:21:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13472 states. [2020-10-28 00:21:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13472 to 5478. [2020-10-28 00:21:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5478 states. [2020-10-28 00:21:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 7900 transitions. [2020-10-28 00:21:58,994 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 7900 transitions. Word has length 81 [2020-10-28 00:21:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:21:58,994 INFO L481 AbstractCegarLoop]: Abstraction has 5478 states and 7900 transitions. [2020-10-28 00:21:58,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:21:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 7900 transitions. [2020-10-28 00:21:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:21:59,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:21:59,004 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] [2020-10-28 00:21:59,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:21:59,004 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:21:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:21:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1993633189, now seen corresponding path program 1 times [2020-10-28 00:21:59,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:21:59,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037088403] [2020-10-28 00:21:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:21:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:59,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:59,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:59,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:59,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:59,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:00,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:00,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:03,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:04,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:04,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:22:04,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:22:04,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 00:22:04,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:04,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:22:04,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 00:22:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 00:22:04,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:06,863 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 00:22:06,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:06,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:06,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:06,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:06,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:06,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 00:22:06,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:06,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:06,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037088403] [2020-10-28 00:22:06,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:06,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:22:06,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078548424] [2020-10-28 00:22:06,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:22:06,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:06,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:22:06,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:22:06,934 INFO L87 Difference]: Start difference. First operand 5478 states and 7900 transitions. Second operand 4 states.