/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:50:43,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:50:43,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:50:43,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:50:43,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:50:43,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:50:43,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:50:43,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:50:43,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:50:43,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:50:43,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:50:43,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:50:43,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:50:43,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:50:43,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:50:43,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:50:43,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:50:43,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:50:43,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:50:43,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:50:43,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:50:43,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:50:43,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:50:43,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:50:43,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:50:43,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:50:43,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:50:43,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:50:43,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:50:43,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:50:43,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:50:43,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:50:43,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:50:43,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:50:43,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:50:43,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:50:43,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:50:43,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:50:43,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:50:43,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:50:43,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:50:43,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:50:43,309 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:50:43,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:50:43,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:50:43,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:50:43,311 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:50:43,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:50:43,312 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:50:43,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:50:43,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:50:43,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:50:43,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:50:43,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:50:43,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:50:43,313 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:50:43,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:50:43,313 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:50:43,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:50:43,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:50:43,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:50:43,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:50:43,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:50:43,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:50:43,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:50:43,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:50:43,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:50:43,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:50:43,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:50:43,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:50:43,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:50:43,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:50:43,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:50:43,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:50:43,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:50:43,648 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:50:43,649 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:50:43,649 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:50:43,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec7a853dc/942113108aa44f92b7697ce789b4b01d/FLAGff4784cda [2020-10-12 19:50:44,278 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:50:44,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:50:44,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec7a853dc/942113108aa44f92b7697ce789b4b01d/FLAGff4784cda [2020-10-12 19:50:44,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec7a853dc/942113108aa44f92b7697ce789b4b01d [2020-10-12 19:50:44,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:50:44,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:50:44,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:50:44,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:50:44,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:50:44,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:50:44" (1/1) ... [2020-10-12 19:50:44,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37fd4afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:44, skipping insertion in model container [2020-10-12 19:50:44,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:50:44" (1/1) ... [2020-10-12 19:50:44,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:50:44,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:50:45,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:50:45,083 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:50:45,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:50:45,201 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:50:45,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:45 WrapperNode [2020-10-12 19:50:45,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:50:45,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:50:45,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:50:45,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:50:45,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:45" (1/1) ... [2020-10-12 19:50:45,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:45" (1/1) ... [2020-10-12 19:50:45,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:45" (1/1) ... [2020-10-12 19:50:45,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:45" (1/1) ... [2020-10-12 19:50:45,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:45" (1/1) ... [2020-10-12 19:50:45,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:45" (1/1) ... [2020-10-12 19:50:45,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:45" (1/1) ... [2020-10-12 19:50:45,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:50:45,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:50:45,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:50:45,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:50:45,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:50:45,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:50:45,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:50:45,340 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:50:45,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:50:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:50:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:50:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:50:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:50:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:50:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:50:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:50:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:50:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:50:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:50:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:50:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:50:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:50:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 19:50:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-12 19:50:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-12 19:50:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure node8 [2020-10-12 19:50:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:50:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:50:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:50:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:50:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:50:46,131 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:50:46,132 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:50:46,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:50:46 BoogieIcfgContainer [2020-10-12 19:50:46,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:50:46,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:50:46,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:50:46,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:50:46,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:50:44" (1/3) ... [2020-10-12 19:50:46,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72db75aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:50:46, skipping insertion in model container [2020-10-12 19:50:46,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:50:45" (2/3) ... [2020-10-12 19:50:46,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72db75aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:50:46, skipping insertion in model container [2020-10-12 19:50:46,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:50:46" (3/3) ... [2020-10-12 19:50:46,146 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:50:46,157 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:50:46,165 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:50:46,179 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:50:46,205 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:50:46,205 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:50:46,206 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:50:46,206 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:50:46,206 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:50:46,206 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:50:46,207 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:50:46,207 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:50:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-10-12 19:50:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 19:50:46,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:50:46,245 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] [2020-10-12 19:50:46,245 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:50:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:50:46,252 INFO L82 PathProgramCache]: Analyzing trace with hash 691167960, now seen corresponding path program 1 times [2020-10-12 19:50:46,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:50:46,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8587175] [2020-10-12 19:50:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:50:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:50:46,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:46,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:47,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:47,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:47,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:50,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:50,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:51,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:50:51,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 19:50:51,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:50:51,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 19:50:51,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:50:51,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:50:51,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:50:51,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 19:50:51,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:50:52,464 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:50:52,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:50:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:50:52,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:52,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:50:52,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:50:52,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:50:52,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 19:50:52,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:50:52,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:50:52,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:50:52,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:50:52,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:50:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:50:52,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8587175] [2020-10-12 19:50:52,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:50:52,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:50:52,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530331877] [2020-10-12 19:50:52,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:50:52,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:50:52,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:50:52,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:50:52,628 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 11 states. [2020-10-12 19:50:53,222 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-12 19:50:55,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:50:55,176 INFO L93 Difference]: Finished difference Result 1672 states and 2659 transitions. [2020-10-12 19:50:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 19:50:55,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 106 [2020-10-12 19:50:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:50:55,206 INFO L225 Difference]: With dead ends: 1672 [2020-10-12 19:50:55,207 INFO L226 Difference]: Without dead ends: 1540 [2020-10-12 19:50:55,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:50:55,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2020-10-12 19:50:55,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 250. [2020-10-12 19:50:55,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-12 19:50:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 357 transitions. [2020-10-12 19:50:55,322 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 357 transitions. Word has length 106 [2020-10-12 19:50:55,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:50:55,323 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 357 transitions. [2020-10-12 19:50:55,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:50:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 357 transitions. [2020-10-12 19:50:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 19:50:55,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:50:55,327 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] [2020-10-12 19:50:55,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:50:55,327 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:50:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:50:55,328 INFO L82 PathProgramCache]: Analyzing trace with hash 552920939, now seen corresponding path program 1 times [2020-10-12 19:50:55,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:50:55,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652986907] [2020-10-12 19:50:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:50:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:50:55,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:55,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:55,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:55,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:56,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:56,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:00,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:00,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 19:51:00,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:51:00,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 19:51:00,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:00,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:51:00,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:51:00,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 19:51:00,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 19:51:00,847 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:51:00,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:51:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:00,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:00,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:00,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:51:00,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:51:00,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 19:51:00,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:51:00,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:51:00,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:51:00,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:51:00,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652986907] [2020-10-12 19:51:00,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:51:00,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:51:00,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473774649] [2020-10-12 19:51:00,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:51:00,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:51:00,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:51:00,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:51:00,943 INFO L87 Difference]: Start difference. First operand 250 states and 357 transitions. Second operand 7 states. [2020-10-12 19:51:01,252 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-12 19:51:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:51:02,362 INFO L93 Difference]: Finished difference Result 747 states and 1143 transitions. [2020-10-12 19:51:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:51:02,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-12 19:51:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:51:02,371 INFO L225 Difference]: With dead ends: 747 [2020-10-12 19:51:02,371 INFO L226 Difference]: Without dead ends: 565 [2020-10-12 19:51:02,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:51:02,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2020-10-12 19:51:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 289. [2020-10-12 19:51:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-12 19:51:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 417 transitions. [2020-10-12 19:51:02,430 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 417 transitions. Word has length 108 [2020-10-12 19:51:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:51:02,431 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 417 transitions. [2020-10-12 19:51:02,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:51:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 417 transitions. [2020-10-12 19:51:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 19:51:02,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:51:02,434 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] [2020-10-12 19:51:02,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:51:02,434 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:51:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:51:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1671256183, now seen corresponding path program 1 times [2020-10-12 19:51:02,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:51:02,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948062732] [2020-10-12 19:51:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:51:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:02,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:02,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:02,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:02,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:03,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:03,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:03,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:07,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:07,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 19:51:07,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:51:07,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 19:51:07,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:51:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:51:07,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 19:51:07,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:07,895 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:51:07,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:51:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:07,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:07,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:07,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:51:07,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:51:07,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 19:51:07,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:07,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:51:07,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:51:07,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:51:07,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:51:07,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948062732] [2020-10-12 19:51:07,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:51:07,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:51:07,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54228687] [2020-10-12 19:51:07,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:51:07,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:51:07,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:51:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:51:07,995 INFO L87 Difference]: Start difference. First operand 289 states and 417 transitions. Second operand 7 states. [2020-10-12 19:51:08,296 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-12 19:51:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:51:09,403 INFO L93 Difference]: Finished difference Result 743 states and 1133 transitions. [2020-10-12 19:51:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:51:09,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-12 19:51:09,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:51:09,408 INFO L225 Difference]: With dead ends: 743 [2020-10-12 19:51:09,408 INFO L226 Difference]: Without dead ends: 561 [2020-10-12 19:51:09,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:51:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-10-12 19:51:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 325. [2020-10-12 19:51:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-12 19:51:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 471 transitions. [2020-10-12 19:51:09,440 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 471 transitions. Word has length 108 [2020-10-12 19:51:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:51:09,440 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 471 transitions. [2020-10-12 19:51:09,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:51:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 471 transitions. [2020-10-12 19:51:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 19:51:09,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:51:09,443 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] [2020-10-12 19:51:09,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:51:09,443 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:51:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:51:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash -711353283, now seen corresponding path program 1 times [2020-10-12 19:51:09,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:51:09,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519549502] [2020-10-12 19:51:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:51:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:09,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:09,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:09,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:09,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:09,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:09,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:10,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:10,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:14,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:14,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 19:51:14,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:51:14,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:51:14,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:14,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:51:14,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:51:14,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 19:51:14,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:14,918 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:51:14,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:51:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:14,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:14,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:14,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:51:14,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:51:14,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 19:51:14,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:14,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:51:14,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:51:14,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:51:14,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:51:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:51:15,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519549502] [2020-10-12 19:51:15,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:51:15,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:51:15,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959530566] [2020-10-12 19:51:15,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:51:15,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:51:15,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:51:15,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:51:15,025 INFO L87 Difference]: Start difference. First operand 325 states and 471 transitions. Second operand 7 states. [2020-10-12 19:51:15,476 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-12 19:51:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:51:16,851 INFO L93 Difference]: Finished difference Result 718 states and 1092 transitions. [2020-10-12 19:51:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:51:16,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-12 19:51:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:51:16,855 INFO L225 Difference]: With dead ends: 718 [2020-10-12 19:51:16,855 INFO L226 Difference]: Without dead ends: 536 [2020-10-12 19:51:16,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:51:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-10-12 19:51:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 345. [2020-10-12 19:51:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-12 19:51:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 501 transitions. [2020-10-12 19:51:16,893 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 501 transitions. Word has length 108 [2020-10-12 19:51:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:51:16,894 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 501 transitions. [2020-10-12 19:51:16,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:51:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 501 transitions. [2020-10-12 19:51:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 19:51:16,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:51:16,896 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] [2020-10-12 19:51:16,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:51:16,896 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:51:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:51:16,897 INFO L82 PathProgramCache]: Analyzing trace with hash -315082167, now seen corresponding path program 1 times [2020-10-12 19:51:16,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:51:16,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431347478] [2020-10-12 19:51:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:51:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:16,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:17,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:17,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:17,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:17,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:18,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:19,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:19,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:21,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:21,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 19:51:21,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:51:21,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:51:21,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:21,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:51:21,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:51:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-12 19:51:21,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:22,312 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:51:22,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:51:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:22,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:22,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:22,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:51:22,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:51:22,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:51:22,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:51:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:51:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:51:22,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:51:22,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431347478] [2020-10-12 19:51:22,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:51:22,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:51:22,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104030102] [2020-10-12 19:51:22,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:51:22,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:51:22,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:51:22,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:51:22,402 INFO L87 Difference]: Start difference. First operand 345 states and 501 transitions. Second operand 11 states. [2020-10-12 19:51:22,758 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-12 19:51:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:51:24,015 INFO L93 Difference]: Finished difference Result 2463 states and 3846 transitions. [2020-10-12 19:51:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 19:51:24,016 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-10-12 19:51:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:51:24,030 INFO L225 Difference]: With dead ends: 2463 [2020-10-12 19:51:24,031 INFO L226 Difference]: Without dead ends: 2281 [2020-10-12 19:51:24,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:51:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2020-10-12 19:51:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 611. [2020-10-12 19:51:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-10-12 19:51:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 924 transitions. [2020-10-12 19:51:24,111 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 924 transitions. Word has length 108 [2020-10-12 19:51:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:51:24,112 INFO L479 AbstractCegarLoop]: Abstraction has 611 states and 924 transitions. [2020-10-12 19:51:24,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:51:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 924 transitions. [2020-10-12 19:51:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 19:51:24,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:51:24,115 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] [2020-10-12 19:51:24,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:51:24,115 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:51:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:51:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1894258611, now seen corresponding path program 1 times [2020-10-12 19:51:24,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:51:24,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210886383] [2020-10-12 19:51:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:51:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:24,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:24,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:24,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:24,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:24,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:25,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:25,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:25,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:25,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:29,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:29,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 19:51:29,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:51:29,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 19:51:29,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:29,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:51:29,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-12 19:51:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:51:29,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:29,466 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:51:29,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:51:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:29,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:29,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:29,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:51:29,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:51:29,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:51:29,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:29,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:51:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:51:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:51:29,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:51:29,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210886383] [2020-10-12 19:51:29,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:51:29,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:51:29,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490484956] [2020-10-12 19:51:29,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:51:29,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:51:29,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:51:29,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:51:29,509 INFO L87 Difference]: Start difference. First operand 611 states and 924 transitions. Second operand 5 states. [2020-10-12 19:51:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:51:30,630 INFO L93 Difference]: Finished difference Result 1055 states and 1624 transitions. [2020-10-12 19:51:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:51:30,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-12 19:51:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:51:30,642 INFO L225 Difference]: With dead ends: 1055 [2020-10-12 19:51:30,642 INFO L226 Difference]: Without dead ends: 1053 [2020-10-12 19:51:30,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:51:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2020-10-12 19:51:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 619. [2020-10-12 19:51:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2020-10-12 19:51:30,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 932 transitions. [2020-10-12 19:51:30,728 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 932 transitions. Word has length 108 [2020-10-12 19:51:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:51:30,728 INFO L479 AbstractCegarLoop]: Abstraction has 619 states and 932 transitions. [2020-10-12 19:51:30,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:51:30,729 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 932 transitions. [2020-10-12 19:51:30,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 19:51:30,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:51:30,730 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] [2020-10-12 19:51:30,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:51:30,730 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:51:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:51:30,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1914307954, now seen corresponding path program 1 times [2020-10-12 19:51:30,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:51:30,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046120191] [2020-10-12 19:51:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:51:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:30,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:30,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:30,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:31,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:31,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:32,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:32,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:35,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:35,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 19:51:35,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:51:35,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:51:35,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:51:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:51:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-12 19:51:35,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:36,217 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:51:36,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:51:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:36,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:36,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:36,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:51:36,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:51:36,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:51:36,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:36,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:51:36,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:51:36,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:51:36,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:51:36,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046120191] [2020-10-12 19:51:36,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:51:36,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:51:36,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217367656] [2020-10-12 19:51:36,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:51:36,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:51:36,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:51:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:51:36,295 INFO L87 Difference]: Start difference. First operand 619 states and 932 transitions. Second operand 11 states. [2020-10-12 19:51:36,763 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-12 19:51:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:51:38,333 INFO L93 Difference]: Finished difference Result 2771 states and 4302 transitions. [2020-10-12 19:51:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 19:51:38,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-10-12 19:51:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:51:38,346 INFO L225 Difference]: With dead ends: 2771 [2020-10-12 19:51:38,347 INFO L226 Difference]: Without dead ends: 2315 [2020-10-12 19:51:38,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:51:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-10-12 19:51:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 619. [2020-10-12 19:51:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2020-10-12 19:51:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 930 transitions. [2020-10-12 19:51:38,440 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 930 transitions. Word has length 108 [2020-10-12 19:51:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:51:38,440 INFO L479 AbstractCegarLoop]: Abstraction has 619 states and 930 transitions. [2020-10-12 19:51:38,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:51:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 930 transitions. [2020-10-12 19:51:38,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 19:51:38,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:51:38,442 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] [2020-10-12 19:51:38,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:51:38,443 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:51:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:51:38,443 INFO L82 PathProgramCache]: Analyzing trace with hash -338827389, now seen corresponding path program 1 times [2020-10-12 19:51:38,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:51:38,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022969355] [2020-10-12 19:51:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:51:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:38,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:38,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:38,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:38,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:38,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:40,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:40,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:40,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:43,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:43,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 19:51:43,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:51:43,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 19:51:43,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:43,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:51:43,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:51:43,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-12 19:51:43,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:43,840 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:51:43,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:51:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:43,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:43,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:43,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:51:43,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:51:43,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:51:43,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:43,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:51:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:51:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:51:43,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:51:43,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022969355] [2020-10-12 19:51:43,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:51:43,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:51:43,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540982626] [2020-10-12 19:51:43,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:51:43,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:51:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:51:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:51:43,890 INFO L87 Difference]: Start difference. First operand 619 states and 930 transitions. Second operand 11 states. [2020-10-12 19:51:44,263 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-12 19:51:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:51:46,006 INFO L93 Difference]: Finished difference Result 2904 states and 4499 transitions. [2020-10-12 19:51:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 19:51:46,007 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-10-12 19:51:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:51:46,021 INFO L225 Difference]: With dead ends: 2904 [2020-10-12 19:51:46,021 INFO L226 Difference]: Without dead ends: 2632 [2020-10-12 19:51:46,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:51:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2020-10-12 19:51:46,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 895. [2020-10-12 19:51:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2020-10-12 19:51:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1364 transitions. [2020-10-12 19:51:46,160 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1364 transitions. Word has length 108 [2020-10-12 19:51:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:51:46,160 INFO L479 AbstractCegarLoop]: Abstraction has 895 states and 1364 transitions. [2020-10-12 19:51:46,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:51:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1364 transitions. [2020-10-12 19:51:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 19:51:46,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:51:46,162 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] [2020-10-12 19:51:46,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:51:46,163 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:51:46,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:51:46,163 INFO L82 PathProgramCache]: Analyzing trace with hash -17097679, now seen corresponding path program 1 times [2020-10-12 19:51:46,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:51:46,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009390419] [2020-10-12 19:51:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:51:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:46,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:46,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:46,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:46,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:46,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:46,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:46,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:46,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:49,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:49,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:51,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:51,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 19:51:51,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:51:51,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:51:51,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:51,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:51:51,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:51:51,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-12 19:51:51,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:51,597 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:51:51,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:51:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:51,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:51,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:51,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:51:51,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:51:51,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:51:51,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:51,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:51:51,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:51:51,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:51:51,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:51:51,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009390419] [2020-10-12 19:51:51,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:51:51,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:51:51,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707706021] [2020-10-12 19:51:51,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:51:51,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:51:51,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:51:51,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:51:51,640 INFO L87 Difference]: Start difference. First operand 895 states and 1364 transitions. Second operand 11 states. [2020-10-12 19:51:52,015 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-12 19:51:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:51:53,825 INFO L93 Difference]: Finished difference Result 3131 states and 4856 transitions. [2020-10-12 19:51:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 19:51:53,826 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-10-12 19:51:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:51:53,839 INFO L225 Difference]: With dead ends: 3131 [2020-10-12 19:51:53,839 INFO L226 Difference]: Without dead ends: 2859 [2020-10-12 19:51:53,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:51:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2020-10-12 19:51:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 1093. [2020-10-12 19:51:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1093 states. [2020-10-12 19:51:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1674 transitions. [2020-10-12 19:51:54,033 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1674 transitions. Word has length 108 [2020-10-12 19:51:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:51:54,034 INFO L479 AbstractCegarLoop]: Abstraction has 1093 states and 1674 transitions. [2020-10-12 19:51:54,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:51:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1674 transitions. [2020-10-12 19:51:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 19:51:54,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:51:54,036 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] [2020-10-12 19:51:54,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:51:54,037 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:51:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:51:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1293108699, now seen corresponding path program 1 times [2020-10-12 19:51:54,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:51:54,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973862887] [2020-10-12 19:51:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:51:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:54,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:54,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:54,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:54,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:54,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:54,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:54,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:54,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:58,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:58,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:59,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:59,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 19:51:59,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:51:59,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:51:59,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:51:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:51:59,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-12 19:51:59,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:59,443 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:51:59,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:51:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:51:59,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:51:59,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:51:59,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:51:59,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:51:59,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:51:59,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:51:59,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:51:59,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:51:59,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:51:59,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:51:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:51:59,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973862887] [2020-10-12 19:51:59,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:51:59,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:51:59,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793573704] [2020-10-12 19:51:59,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:51:59,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:51:59,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:51:59,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:51:59,481 INFO L87 Difference]: Start difference. First operand 1093 states and 1674 transitions. Second operand 11 states. [2020-10-12 19:51:59,847 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-12 19:52:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:01,708 INFO L93 Difference]: Finished difference Result 3392 states and 5265 transitions. [2020-10-12 19:52:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 19:52:01,709 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-10-12 19:52:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:01,724 INFO L225 Difference]: With dead ends: 3392 [2020-10-12 19:52:01,724 INFO L226 Difference]: Without dead ends: 3120 [2020-10-12 19:52:01,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:52:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2020-10-12 19:52:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 1309. [2020-10-12 19:52:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-10-12 19:52:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2011 transitions. [2020-10-12 19:52:01,928 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2011 transitions. Word has length 108 [2020-10-12 19:52:01,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:01,928 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2011 transitions. [2020-10-12 19:52:01,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:52:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2011 transitions. [2020-10-12 19:52:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-12 19:52:01,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:01,930 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] [2020-10-12 19:52:01,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:52:01,931 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1248592648, now seen corresponding path program 1 times [2020-10-12 19:52:01,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:01,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059146210] [2020-10-12 19:52:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:01,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:02,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:02,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:02,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:02,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:02,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:02,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:03,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:03,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:03,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:06,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:06,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-12 19:52:06,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:52:06,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:52:06,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:06,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:52:06,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:52:06,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 19:52:06,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:07,346 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:52:07,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:07,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:07,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:07,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:07,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:07,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:52:07,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:07,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:07,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:07,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:52:07,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:07,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059146210] [2020-10-12 19:52:07,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:07,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:52:07,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895468231] [2020-10-12 19:52:07,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:52:07,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:07,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:52:07,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:52:07,400 INFO L87 Difference]: Start difference. First operand 1309 states and 2011 transitions. Second operand 7 states. [2020-10-12 19:52:07,691 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-12 19:52:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:09,050 INFO L93 Difference]: Finished difference Result 4343 states and 6777 transitions. [2020-10-12 19:52:09,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:52:09,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-12 19:52:09,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:09,062 INFO L225 Difference]: With dead ends: 4343 [2020-10-12 19:52:09,062 INFO L226 Difference]: Without dead ends: 3111 [2020-10-12 19:52:09,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:52:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2020-10-12 19:52:09,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 1279. [2020-10-12 19:52:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2020-10-12 19:52:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1963 transitions. [2020-10-12 19:52:09,326 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1963 transitions. Word has length 109 [2020-10-12 19:52:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:09,327 INFO L479 AbstractCegarLoop]: Abstraction has 1279 states and 1963 transitions. [2020-10-12 19:52:09,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:52:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1963 transitions. [2020-10-12 19:52:09,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-12 19:52:09,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:09,329 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] [2020-10-12 19:52:09,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:52:09,329 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:09,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1397905303, now seen corresponding path program 1 times [2020-10-12 19:52:09,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:09,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882949485] [2020-10-12 19:52:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:09,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:09,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:09,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:09,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:09,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:09,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:10,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:10,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:10,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:14,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:14,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-12 19:52:14,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:52:14,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:52:14,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:14,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 19:52:14,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 19:52:14,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:14,641 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:52:14,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:14,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:14,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:14,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:14,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:14,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:52:14,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:14,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882949485] [2020-10-12 19:52:14,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:14,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:52:14,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599814855] [2020-10-12 19:52:14,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:52:14,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:14,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:52:14,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:52:14,677 INFO L87 Difference]: Start difference. First operand 1279 states and 1963 transitions. Second operand 4 states. [2020-10-12 19:52:14,973 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-12 19:52:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:16,150 INFO L93 Difference]: Finished difference Result 3383 states and 5271 transitions. [2020-10-12 19:52:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:52:16,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-12 19:52:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:16,158 INFO L225 Difference]: With dead ends: 3383 [2020-10-12 19:52:16,158 INFO L226 Difference]: Without dead ends: 2271 [2020-10-12 19:52:16,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:52:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2020-10-12 19:52:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2241. [2020-10-12 19:52:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2241 states. [2020-10-12 19:52:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 3466 transitions. [2020-10-12 19:52:16,571 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 3466 transitions. Word has length 109 [2020-10-12 19:52:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:16,572 INFO L479 AbstractCegarLoop]: Abstraction has 2241 states and 3466 transitions. [2020-10-12 19:52:16,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:52:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 3466 transitions. [2020-10-12 19:52:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 19:52:16,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:16,574 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, 1] [2020-10-12 19:52:16,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:52:16,574 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:16,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:16,575 INFO L82 PathProgramCache]: Analyzing trace with hash -538104442, now seen corresponding path program 1 times [2020-10-12 19:52:16,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:16,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690680088] [2020-10-12 19:52:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:16,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:16,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:16,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:16,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:17,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:17,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:17,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:19,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:19,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 19:52:19,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:52:19,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2740 [2020-10-12 19:52:19,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 19:52:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 19:52:19,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:19,622 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:52:19,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:19,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:19,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:19,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:19,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:19,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:52:19,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:19,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:19,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690680088] [2020-10-12 19:52:19,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:19,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:52:19,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691870657] [2020-10-12 19:52:19,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:52:19,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:19,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:52:19,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:52:19,656 INFO L87 Difference]: Start difference. First operand 2241 states and 3466 transitions. Second operand 4 states. [2020-10-12 19:52:19,975 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-12 19:52:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:21,406 INFO L93 Difference]: Finished difference Result 6253 states and 9744 transitions. [2020-10-12 19:52:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:52:21,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-12 19:52:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:21,425 INFO L225 Difference]: With dead ends: 6253 [2020-10-12 19:52:21,426 INFO L226 Difference]: Without dead ends: 4147 [2020-10-12 19:52:21,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:52:21,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2020-10-12 19:52:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 4105. [2020-10-12 19:52:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4105 states. [2020-10-12 19:52:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 6360 transitions. [2020-10-12 19:52:22,072 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 6360 transitions. Word has length 110 [2020-10-12 19:52:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:22,073 INFO L479 AbstractCegarLoop]: Abstraction has 4105 states and 6360 transitions. [2020-10-12 19:52:22,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:52:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 6360 transitions. [2020-10-12 19:52:22,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-12 19:52:22,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:22,075 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, 1, 1] [2020-10-12 19:52:22,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:52:22,075 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:22,076 INFO L82 PathProgramCache]: Analyzing trace with hash 580576035, now seen corresponding path program 1 times [2020-10-12 19:52:22,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:22,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980380486] [2020-10-12 19:52:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:22,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:22,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:22,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:22,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:22,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:23,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:23,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:23,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:27,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:27,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-12 19:52:27,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:52:27,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 19:52:27,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:27,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:52:27,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:52:27,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 19:52:27,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:27,404 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:52:27,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:27,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:27,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:27,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:27,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:27,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 19:52:27,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:27,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:27,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:27,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:52:27,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:27,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980380486] [2020-10-12 19:52:27,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:27,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:52:27,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947926522] [2020-10-12 19:52:27,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:52:27,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:52:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:52:27,451 INFO L87 Difference]: Start difference. First operand 4105 states and 6360 transitions. Second operand 6 states. [2020-10-12 19:52:27,759 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-12 19:52:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:29,054 INFO L93 Difference]: Finished difference Result 8115 states and 12613 transitions. [2020-10-12 19:52:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:52:29,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2020-10-12 19:52:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:29,064 INFO L225 Difference]: With dead ends: 8115 [2020-10-12 19:52:29,064 INFO L226 Difference]: Without dead ends: 4105 [2020-10-12 19:52:29,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:52:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4105 states. [2020-10-12 19:52:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4105 to 4105. [2020-10-12 19:52:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4105 states. [2020-10-12 19:52:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 6336 transitions. [2020-10-12 19:52:29,765 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 6336 transitions. Word has length 111 [2020-10-12 19:52:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:29,765 INFO L479 AbstractCegarLoop]: Abstraction has 4105 states and 6336 transitions. [2020-10-12 19:52:29,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:52:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 6336 transitions. [2020-10-12 19:52:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-12 19:52:29,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:29,767 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, 1, 1] [2020-10-12 19:52:29,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:52:29,767 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:29,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1855969272, now seen corresponding path program 1 times [2020-10-12 19:52:29,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:29,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643964768] [2020-10-12 19:52:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:29,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:29,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:29,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:29,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:30,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:30,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:30,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:31,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:31,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-12 19:52:31,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:52:31,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1644 [2020-10-12 19:52:31,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:31,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:31,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:52:31,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 19:52:31,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:31,709 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:52:31,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:31,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:31,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:31,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:31,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:31,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:52:31,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:31,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:31,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:31,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:31,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:31,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643964768] [2020-10-12 19:52:31,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:31,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:52:31,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185765239] [2020-10-12 19:52:31,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:52:31,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:31,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:52:31,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:52:31,752 INFO L87 Difference]: Start difference. First operand 4105 states and 6336 transitions. Second operand 4 states. [2020-10-12 19:52:32,046 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-12 19:52:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:33,928 INFO L93 Difference]: Finished difference Result 11741 states and 18170 transitions. [2020-10-12 19:52:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:52:33,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-12 19:52:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:33,945 INFO L225 Difference]: With dead ends: 11741 [2020-10-12 19:52:33,946 INFO L226 Difference]: Without dead ends: 7731 [2020-10-12 19:52:33,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:52:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7731 states. [2020-10-12 19:52:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7731 to 7729. [2020-10-12 19:52:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7729 states. [2020-10-12 19:52:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7729 states to 7729 states and 11892 transitions. [2020-10-12 19:52:35,234 INFO L78 Accepts]: Start accepts. Automaton has 7729 states and 11892 transitions. Word has length 111 [2020-10-12 19:52:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:35,234 INFO L479 AbstractCegarLoop]: Abstraction has 7729 states and 11892 transitions. [2020-10-12 19:52:35,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:52:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 7729 states and 11892 transitions. [2020-10-12 19:52:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 19:52:35,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:35,235 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, 1, 1, 1] [2020-10-12 19:52:35,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:52:35,235 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2127848223, now seen corresponding path program 1 times [2020-10-12 19:52:35,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:35,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641541567] [2020-10-12 19:52:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:35,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:35,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:35,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:35,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:35,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:35,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:36,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:36,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 19:52:36,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:52:36,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-12 19:52:36,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-12 19:52:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 19:52:36,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:36,496 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:52:36,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:36,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:36,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:36,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:36,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:36,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:52:36,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:36,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:36,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641541567] [2020-10-12 19:52:36,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:36,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:52:36,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291946921] [2020-10-12 19:52:36,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:52:36,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:36,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:52:36,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:52:36,528 INFO L87 Difference]: Start difference. First operand 7729 states and 11892 transitions. Second operand 4 states. [2020-10-12 19:52:36,819 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-12 19:52:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:39,702 INFO L93 Difference]: Finished difference Result 22229 states and 34214 transitions. [2020-10-12 19:52:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:52:39,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-10-12 19:52:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:39,730 INFO L225 Difference]: With dead ends: 22229 [2020-10-12 19:52:39,730 INFO L226 Difference]: Without dead ends: 14595 [2020-10-12 19:52:39,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:52:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14595 states. [2020-10-12 19:52:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14595 to 14593. [2020-10-12 19:52:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14593 states. [2020-10-12 19:52:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14593 states to 14593 states and 22332 transitions. [2020-10-12 19:52:42,054 INFO L78 Accepts]: Start accepts. Automaton has 14593 states and 22332 transitions. Word has length 112 [2020-10-12 19:52:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:42,055 INFO L479 AbstractCegarLoop]: Abstraction has 14593 states and 22332 transitions. [2020-10-12 19:52:42,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:52:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 14593 states and 22332 transitions. [2020-10-12 19:52:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 19:52:42,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:42,056 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, 1, 1, 1, 1] [2020-10-12 19:52:42,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:52:42,056 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:42,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1556111658, now seen corresponding path program 1 times [2020-10-12 19:52:42,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:42,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883827708] [2020-10-12 19:52:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:42,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:42,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:42,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:43,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:43,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:44,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:44,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 19:52:44,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:52:44,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2301 [2020-10-12 19:52:44,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:52:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:52:44,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-12 19:52:44,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:44,672 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:52:44,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:44,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:44,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:44,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:44,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:44,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:52:44,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:44,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:44,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:44,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:52:44,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:44,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883827708] [2020-10-12 19:52:44,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:44,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:52:44,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122656879] [2020-10-12 19:52:44,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:52:44,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:44,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:52:44,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:52:44,714 INFO L87 Difference]: Start difference. First operand 14593 states and 22332 transitions. Second operand 6 states. [2020-10-12 19:52:45,025 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-12 19:52:47,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:47,823 INFO L93 Difference]: Finished difference Result 29091 states and 44557 transitions. [2020-10-12 19:52:47,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:52:47,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-10-12 19:52:47,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:47,851 INFO L225 Difference]: With dead ends: 29091 [2020-10-12 19:52:47,851 INFO L226 Difference]: Without dead ends: 14593 [2020-10-12 19:52:47,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:52:47,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14593 states. [2020-10-12 19:52:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14593 to 14593. [2020-10-12 19:52:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14593 states. [2020-10-12 19:52:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14593 states to 14593 states and 22236 transitions. [2020-10-12 19:52:50,232 INFO L78 Accepts]: Start accepts. Automaton has 14593 states and 22236 transitions. Word has length 113 [2020-10-12 19:52:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:50,232 INFO L479 AbstractCegarLoop]: Abstraction has 14593 states and 22236 transitions. [2020-10-12 19:52:50,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:52:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 14593 states and 22236 transitions. [2020-10-12 19:52:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 19:52:50,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:50,234 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, 1, 1, 1, 1] [2020-10-12 19:52:50,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:52:50,234 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:50,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1873323249, now seen corresponding path program 1 times [2020-10-12 19:52:50,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:50,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179151145] [2020-10-12 19:52:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:50,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:50,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:50,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:50,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:50,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:50,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:50,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 19:52:50,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:52:50,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-12 19:52:50,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:50,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:50,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:52:50,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 19:52:50,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:51,097 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:52:51,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:51,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:51,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:51,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:51,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:51,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:52:51,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:51,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:51,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:51,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:51,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:51,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179151145] [2020-10-12 19:52:51,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:51,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:52:51,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010453509] [2020-10-12 19:52:51,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:52:51,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:51,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:52:51,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:52:51,133 INFO L87 Difference]: Start difference. First operand 14593 states and 22236 transitions. Second operand 4 states. [2020-10-12 19:52:51,433 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-12 19:52:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:56,432 INFO L93 Difference]: Finished difference Result 42250 states and 64339 transitions. [2020-10-12 19:52:56,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:52:56,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-10-12 19:52:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:56,467 INFO L225 Difference]: With dead ends: 42250 [2020-10-12 19:52:56,467 INFO L226 Difference]: Without dead ends: 27732 [2020-10-12 19:52:56,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:52:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27732 states. [2020-10-12 19:53:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27732 to 27538. [2020-10-12 19:53:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27538 states. [2020-10-12 19:53:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27538 states to 27538 states and 41524 transitions. [2020-10-12 19:53:01,096 INFO L78 Accepts]: Start accepts. Automaton has 27538 states and 41524 transitions. Word has length 113 [2020-10-12 19:53:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:01,096 INFO L479 AbstractCegarLoop]: Abstraction has 27538 states and 41524 transitions. [2020-10-12 19:53:01,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:53:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 27538 states and 41524 transitions. [2020-10-12 19:53:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 19:53:01,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:01,098 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, 1, 1, 1, 1, 1] [2020-10-12 19:53:01,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:53:01,098 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash -605594381, now seen corresponding path program 1 times [2020-10-12 19:53:01,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:01,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670250688] [2020-10-12 19:53:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:01,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:02,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:02,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 19:53:02,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:53:02,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1500 [2020-10-12 19:53:02,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:53:02,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:53:02,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-12 19:53:02,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:02,947 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:53:02,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:02,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:02,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:02,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:02,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:02,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:53:02,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:02,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:02,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:02,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670250688] [2020-10-12 19:53:02,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:02,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:53:02,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423878940] [2020-10-12 19:53:02,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:53:02,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:53:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:53:02,988 INFO L87 Difference]: Start difference. First operand 27538 states and 41524 transitions. Second operand 5 states. [2020-10-12 19:53:03,312 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-12 19:53:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:11,409 INFO L93 Difference]: Finished difference Result 56120 states and 85111 transitions. [2020-10-12 19:53:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:53:11,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-10-12 19:53:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:11,451 INFO L225 Difference]: With dead ends: 56120 [2020-10-12 19:53:11,451 INFO L226 Difference]: Without dead ends: 41622 [2020-10-12 19:53:11,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:53:11,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41622 states. [2020-10-12 19:53:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41622 to 41426. [2020-10-12 19:53:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41426 states. [2020-10-12 19:53:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41426 states to 41426 states and 62324 transitions. [2020-10-12 19:53:18,049 INFO L78 Accepts]: Start accepts. Automaton has 41426 states and 62324 transitions. Word has length 114 [2020-10-12 19:53:18,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:18,049 INFO L479 AbstractCegarLoop]: Abstraction has 41426 states and 62324 transitions. [2020-10-12 19:53:18,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:53:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 41426 states and 62324 transitions. [2020-10-12 19:53:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 19:53:18,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:18,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:18,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:53:18,051 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:18,052 INFO L82 PathProgramCache]: Analyzing trace with hash -949946203, now seen corresponding path program 1 times [2020-10-12 19:53:18,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:18,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426818134] [2020-10-12 19:53:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:18,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:18,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:18,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:18,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:18,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:19,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:19,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 19:53:19,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:53:19,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1673 [2020-10-12 19:53:19,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:19,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:53:19,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:19,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 19:53:19,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:20,068 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:53:20,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:20,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:20,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:20,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:20,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:20,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 19:53:20,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:20,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:20,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:20,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:20,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:20,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426818134] [2020-10-12 19:53:20,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:20,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:53:20,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490714468] [2020-10-12 19:53:20,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:53:20,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:53:20,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:53:20,123 INFO L87 Difference]: Start difference. First operand 41426 states and 62324 transitions. Second operand 7 states. [2020-10-12 19:53:20,424 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-12 19:53:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:37,594 INFO L93 Difference]: Finished difference Result 133894 states and 199454 transitions. [2020-10-12 19:53:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:53:37,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-12 19:53:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:37,695 INFO L225 Difference]: With dead ends: 133894 [2020-10-12 19:53:37,695 INFO L226 Difference]: Without dead ends: 92580 [2020-10-12 19:53:37,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:53:37,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92580 states. [2020-10-12 19:53:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92580 to 41458. [2020-10-12 19:53:46,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41458 states. [2020-10-12 19:53:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41458 states to 41458 states and 62368 transitions. [2020-10-12 19:53:46,469 INFO L78 Accepts]: Start accepts. Automaton has 41458 states and 62368 transitions. Word has length 114 [2020-10-12 19:53:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:46,469 INFO L479 AbstractCegarLoop]: Abstraction has 41458 states and 62368 transitions. [2020-10-12 19:53:46,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:53:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 41458 states and 62368 transitions. [2020-10-12 19:53:46,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 19:53:46,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:46,470 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, 1, 1, 1, 1, 1] [2020-10-12 19:53:46,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:53:46,471 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:46,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1604759655, now seen corresponding path program 1 times [2020-10-12 19:53:46,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:46,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281698858] [2020-10-12 19:53:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:46,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:46,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:46,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:46,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:46,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:47,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:47,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 19:53:47,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:53:47,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-12 19:53:47,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:47,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:53:47,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:47,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 19:53:47,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:48,251 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:53:48,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:48,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:48,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:48,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:48,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:48,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:53:48,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:48,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:48,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:48,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:48,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:48,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281698858] [2020-10-12 19:53:48,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:48,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:53:48,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966105496] [2020-10-12 19:53:48,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:53:48,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:48,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:53:48,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:53:48,308 INFO L87 Difference]: Start difference. First operand 41458 states and 62368 transitions. Second operand 7 states. [2020-10-12 19:53:48,600 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-12 19:54:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:07,850 INFO L93 Difference]: Finished difference Result 145422 states and 217890 transitions. [2020-10-12 19:54:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:54:07,851 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-12 19:54:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:07,972 INFO L225 Difference]: With dead ends: 145422 [2020-10-12 19:54:07,972 INFO L226 Difference]: Without dead ends: 104056 [2020-10-12 19:54:08,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:54:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104056 states. [2020-10-12 19:54:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104056 to 41430. [2020-10-12 19:54:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41430 states. [2020-10-12 19:54:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41430 states to 41430 states and 62326 transitions. [2020-10-12 19:54:17,430 INFO L78 Accepts]: Start accepts. Automaton has 41430 states and 62326 transitions. Word has length 114 [2020-10-12 19:54:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:17,431 INFO L479 AbstractCegarLoop]: Abstraction has 41430 states and 62326 transitions. [2020-10-12 19:54:17,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:54:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 41430 states and 62326 transitions. [2020-10-12 19:54:17,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-12 19:54:17,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:17,440 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:17,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:54:17,440 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:17,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1669748261, now seen corresponding path program 1 times [2020-10-12 19:54:17,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:17,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507447227] [2020-10-12 19:54:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:17,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:17,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:22,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:22,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:22,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:22,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 19:54:22,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:54:22,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:54:22,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:22,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:54:22,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:22,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-12 19:54:22,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:23,023 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:54:23,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:23,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:23,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:23,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:23,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:23,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 19:54:23,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:23,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:23,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507447227] [2020-10-12 19:54:23,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:54:23,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:54:23,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678769052] [2020-10-12 19:54:23,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:54:23,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:23,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:54:23,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:54:23,099 INFO L87 Difference]: Start difference. First operand 41430 states and 62326 transitions. Second operand 11 states. [2020-10-12 19:54:23,473 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 204