/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/loop-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:46:45,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:46:45,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:46:45,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:46:45,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:46:45,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:46:45,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:46:45,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:46:45,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:46:45,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:46:45,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:46:45,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:46:45,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:46:45,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:46:45,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:46:45,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:46:45,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:46:45,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:46:45,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:46:45,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:46:45,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:46:45,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:46:45,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:46:45,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:46:45,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:46:45,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:46:45,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:46:45,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:46:45,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:46:45,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:46:45,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:46:45,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:46:45,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:46:45,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:46:45,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:46:45,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:46:45,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:46:45,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:46:45,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:46:45,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:46:45,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:46:45,653 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 [2020-10-14 23:46:45,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:46:45,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:46:45,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:46:45,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:46:45,677 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:46:45,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:46:45,678 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:46:45,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:46:45,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:46:45,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:46:45,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:46:45,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:46:45,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:46:45,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:46:45,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:46:45,679 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:46:45,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:46:45,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:46:45,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:46:45,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:46:45,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:46:45,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:46:45,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:46:45,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:46:45,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:46:45,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:46:45,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:46:45,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:46:45,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:46:45,682 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:46:46,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:46:46,023 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:46:46,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:46:46,028 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:46:46,028 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:46:46,029 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2020-10-14 23:46:46,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dbc03fde/568d993a3b3e4a68b52db98bdf434d09/FLAG68c798725 [2020-10-14 23:46:46,492 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:46:46,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2020-10-14 23:46:46,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dbc03fde/568d993a3b3e4a68b52db98bdf434d09/FLAG68c798725 [2020-10-14 23:46:46,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dbc03fde/568d993a3b3e4a68b52db98bdf434d09 [2020-10-14 23:46:46,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:46:46,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:46:46,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:46:46,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:46:46,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:46:46,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:46:46" (1/1) ... [2020-10-14 23:46:46,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e8bb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:46, skipping insertion in model container [2020-10-14 23:46:46,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:46:46" (1/1) ... [2020-10-14 23:46:46,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:46:46,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:46:47,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:46:47,219 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:46:47,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:46:47,252 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:46:47,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:47 WrapperNode [2020-10-14 23:46:47,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:46:47,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:46:47,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:46:47,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:46:47,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:47" (1/1) ... [2020-10-14 23:46:47,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:47" (1/1) ... [2020-10-14 23:46:47,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:47" (1/1) ... [2020-10-14 23:46:47,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:47" (1/1) ... [2020-10-14 23:46:47,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:47" (1/1) ... [2020-10-14 23:46:47,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:47" (1/1) ... [2020-10-14 23:46:47,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:47" (1/1) ... [2020-10-14 23:46:47,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:46:47,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:46:47,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:46:47,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:46:47,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:47" (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 [2020-10-14 23:46:47,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:46:47,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:46:47,437 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:46:47,437 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:46:47,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:46:47,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:46:47,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:46:47,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:46:47,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:46:47,601 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:46:47,601 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:46:47,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:46:47 BoogieIcfgContainer [2020-10-14 23:46:47,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:46:47,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:46:47,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:46:47,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:46:47,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:46:46" (1/3) ... [2020-10-14 23:46:47,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2389bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:46:47, skipping insertion in model container [2020-10-14 23:46:47,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:47" (2/3) ... [2020-10-14 23:46:47,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2389bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:46:47, skipping insertion in model container [2020-10-14 23:46:47,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:46:47" (3/3) ... [2020-10-14 23:46:47,614 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2020-10-14 23:46:47,625 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:46:47,632 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:46:47,647 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:46:47,672 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:46:47,672 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:46:47,672 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:46:47,672 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:46:47,672 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:46:47,673 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:46:47,673 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:46:47,673 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:46:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-14 23:46:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 23:46:47,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:47,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:47,694 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:47,699 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-14 23:46:47,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:47,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892805614] [2020-10-14 23:46:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:47,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:48,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:48,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:46:48,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:48,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-14 23:46:48,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:48,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:46:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:46:48,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:46:48,391 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 15 [2020-10-14 23:46:48,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:48,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:48,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:48,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:48,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:48,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:46:48,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:48,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:48,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:48,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:48,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:48,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:48,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892805614] [2020-10-14 23:46:48,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:46:48,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:46:48,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645428330] [2020-10-14 23:46:48,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:46:48,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:48,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:46:48,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:46:48,449 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-10-14 23:46:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:48,553 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-10-14 23:46:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:46:48,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-14 23:46:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:48,563 INFO L225 Difference]: With dead ends: 38 [2020-10-14 23:46:48,564 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 23:46:48,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:46:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 23:46:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 23:46:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 23:46:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-14 23:46:48,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-10-14 23:46:48,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:48,609 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-14 23:46:48,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:46:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-14 23:46:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:46:48,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:48,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:48,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:46:48,611 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:48,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2020-10-14 23:46:48,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:48,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957887710] [2020-10-14 23:46:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:48,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:48,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:48,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:46:48,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:48,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-14 23:46:48,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:48,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:48,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:46:48,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:46:48,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:46:48,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:48,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:48,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:48,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:48,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:48,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:48,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 23:46:48,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:48,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:48,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:48,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:48,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:48,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:48,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957887710] [2020-10-14 23:46:48,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:46:48,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:46:48,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050424292] [2020-10-14 23:46:48,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:46:48,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:48,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:46:48,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:46:48,758 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-10-14 23:46:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:48,786 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-10-14 23:46:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:46:48,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 23:46:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:48,790 INFO L225 Difference]: With dead ends: 23 [2020-10-14 23:46:48,790 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 23:46:48,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:46:48,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 23:46:48,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2020-10-14 23:46:48,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 23:46:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-14 23:46:48,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-14 23:46:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:48,806 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-14 23:46:48,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:46:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-14 23:46:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:46:48,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:48,807 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:48,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:46:48,809 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:48,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:48,810 INFO L82 PathProgramCache]: Analyzing trace with hash -109889104, now seen corresponding path program 1 times [2020-10-14 23:46:48,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:48,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794690464] [2020-10-14 23:46:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:48,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:48,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:48,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:48,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:46:48,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:48,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-14 23:46:48,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:48,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:46:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:46:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:46:48,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:49,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:49,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:49,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:49,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:49,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:49,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:49,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:49,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:49,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:49,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:49,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:49,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794690464] [2020-10-14 23:46:49,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:49,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:46:49,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967943045] [2020-10-14 23:46:49,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:46:49,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:49,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:46:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:46:49,052 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-14 23:46:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:49,092 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-10-14 23:46:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:46:49,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 23:46:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:49,094 INFO L225 Difference]: With dead ends: 27 [2020-10-14 23:46:49,094 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:46:49,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:46:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:46:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2020-10-14 23:46:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:46:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-14 23:46:49,100 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-10-14 23:46:49,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:49,101 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-14 23:46:49,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:46:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-14 23:46:49,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:46:49,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:49,102 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:49,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:46:49,103 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:49,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:49,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1391623509, now seen corresponding path program 2 times [2020-10-14 23:46:49,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:49,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297064578] [2020-10-14 23:46:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:49,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:49,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:46:49,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:49,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-14 23:46:49,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:49,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:49,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:46:49,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:49,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:46:49,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:49,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:49,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:49,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:49,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:49,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:49,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:49,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:49,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:49,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:49,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297064578] [2020-10-14 23:46:49,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:49,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:46:49,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773826972] [2020-10-14 23:46:49,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:46:49,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:49,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:46:49,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:46:49,338 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2020-10-14 23:46:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:49,360 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-10-14 23:46:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:46:49,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 23:46:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:49,362 INFO L225 Difference]: With dead ends: 31 [2020-10-14 23:46:49,362 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 23:46:49,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:46:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 23:46:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 23:46:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 23:46:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-14 23:46:49,368 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-14 23:46:49,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:49,368 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-14 23:46:49,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:46:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-14 23:46:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:46:49,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:49,369 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:49,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:46:49,370 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:49,370 INFO L82 PathProgramCache]: Analyzing trace with hash -89745752, now seen corresponding path program 3 times [2020-10-14 23:46:49,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:49,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077847461] [2020-10-14 23:46:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:49,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:49,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:46:49,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:49,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-14 23:46:49,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:49,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:46:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:46:49,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:49,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:49,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:49,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:49,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:49,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:49,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:49,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:49,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:49,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077847461] [2020-10-14 23:46:49,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:49,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:46:49,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396685055] [2020-10-14 23:46:49,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:46:49,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:49,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:46:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:46:49,592 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-14 23:46:49,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:49,625 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-14 23:46:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:46:49,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 23:46:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:49,626 INFO L225 Difference]: With dead ends: 31 [2020-10-14 23:46:49,626 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 23:46:49,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:46:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 23:46:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-14 23:46:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 23:46:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-14 23:46:49,633 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-14 23:46:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:49,633 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-14 23:46:49,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:46:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-14 23:46:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:46:49,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:49,635 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:49,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:46:49,635 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:49,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1179295589, now seen corresponding path program 4 times [2020-10-14 23:46:49,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:49,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547384778] [2020-10-14 23:46:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:49,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:49,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:46:49,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:49,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-14 23:46:49,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:49,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:49,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:46:49,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:49,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:46:49,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:49,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:49,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:49,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:49,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:49,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:49,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:49,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:49,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:49,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:49,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:49,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:49,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547384778] [2020-10-14 23:46:49,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:49,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:46:49,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544499695] [2020-10-14 23:46:49,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:46:49,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:46:49,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:46:49,942 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-14 23:46:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:50,001 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 23:46:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:46:50,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 23:46:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:50,003 INFO L225 Difference]: With dead ends: 33 [2020-10-14 23:46:50,003 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 23:46:50,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:46:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 23:46:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 23:46:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:46:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 23:46:50,009 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-14 23:46:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:50,010 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 23:46:50,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:46:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 23:46:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:46:50,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:50,011 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:50,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:46:50,011 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash 957312226, now seen corresponding path program 5 times [2020-10-14 23:46:50,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:50,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474822756] [2020-10-14 23:46:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:50,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:50,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:50,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:50,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:46:50,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:50,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-14 23:46:50,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:50,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:50,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:46:50,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:50,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:46:50,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:50,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:50,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:50,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:50,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:50,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:50,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:50,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:50,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:50,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:50,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:50,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474822756] [2020-10-14 23:46:50,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:50,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:46:50,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219230336] [2020-10-14 23:46:50,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:46:50,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:50,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:46:50,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:46:50,368 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-14 23:46:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:50,430 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-14 23:46:50,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:46:50,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 23:46:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:50,433 INFO L225 Difference]: With dead ends: 35 [2020-10-14 23:46:50,433 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 23:46:50,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:46:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 23:46:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 23:46:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:46:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-14 23:46:50,443 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-14 23:46:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:50,443 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-14 23:46:50,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:46:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-14 23:46:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:46:50,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:50,447 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:50,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:46:50,447 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:50,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1915302113, now seen corresponding path program 6 times [2020-10-14 23:46:50,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:50,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188632148] [2020-10-14 23:46:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:50,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:50,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:50,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:50,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:46:50,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:50,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-14 23:46:50,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:50,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:50,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:46:50,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:50,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:46:50,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:50,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:50,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:50,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:50,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:50,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:50,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:50,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:50,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:50,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:50,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188632148] [2020-10-14 23:46:50,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:50,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:46:50,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860267801] [2020-10-14 23:46:50,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:46:50,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:50,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:46:50,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:46:50,905 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2020-10-14 23:46:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:50,987 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-14 23:46:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:46:50,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 23:46:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:50,989 INFO L225 Difference]: With dead ends: 37 [2020-10-14 23:46:50,989 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 23:46:50,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:46:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 23:46:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 23:46:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:46:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-14 23:46:50,998 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-14 23:46:50,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:50,998 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-14 23:46:50,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:46:50,999 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-14 23:46:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:46:50,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:50,999 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:51,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:46:51,002 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:51,002 INFO L82 PathProgramCache]: Analyzing trace with hash -833710564, now seen corresponding path program 7 times [2020-10-14 23:46:51,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:51,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314274327] [2020-10-14 23:46:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:51,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:51,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:51,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:51,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:46:51,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:51,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-14 23:46:51,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:51,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:46:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:51,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:46:51,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:51,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:51,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:51,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:51,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:51,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:51,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:46:51,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:51,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:51,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:51,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314274327] [2020-10-14 23:46:51,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:51,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:46:51,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793091181] [2020-10-14 23:46:51,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:46:51,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:51,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:46:51,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:46:51,501 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2020-10-14 23:46:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:51,603 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-14 23:46:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:46:51,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 23:46:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:51,604 INFO L225 Difference]: With dead ends: 39 [2020-10-14 23:46:51,605 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 23:46:51,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:46:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 23:46:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-14 23:46:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:46:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-14 23:46:51,615 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-10-14 23:46:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:51,616 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-14 23:46:51,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:46:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-14 23:46:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:46:51,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:51,618 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:51,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:46:51,618 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:51,618 INFO L82 PathProgramCache]: Analyzing trace with hash -806317607, now seen corresponding path program 8 times [2020-10-14 23:46:51,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:51,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917076360] [2020-10-14 23:46:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:51,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:51,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:52,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:46:52,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:52,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-14 23:46:52,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:52,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:46:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:46:52,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:52,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:52,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:52,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:52,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:52,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:52,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:52,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:52,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:52,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917076360] [2020-10-14 23:46:52,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:52,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:46:52,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547722403] [2020-10-14 23:46:52,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:46:52,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:52,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:46:52,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:46:52,196 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-14 23:46:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:52,318 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-14 23:46:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:46:52,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 23:46:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:52,321 INFO L225 Difference]: With dead ends: 41 [2020-10-14 23:46:52,321 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 23:46:52,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:46:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 23:46:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 23:46:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:46:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-14 23:46:52,331 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-10-14 23:46:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:52,331 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-14 23:46:52,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:46:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-14 23:46:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:46:52,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:52,335 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:52,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:46:52,335 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:52,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:52,335 INFO L82 PathProgramCache]: Analyzing trace with hash -251489706, now seen corresponding path program 9 times [2020-10-14 23:46:52,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:52,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468292168] [2020-10-14 23:46:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:52,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:52,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:46:52,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:52,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-14 23:46:52,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:52,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:46:52,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:52,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:46:52,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:52,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:52,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:52,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:52,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:52,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:52,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:52,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:52,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:52,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:52,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:52,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:52,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468292168] [2020-10-14 23:46:52,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:52,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:46:52,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134005102] [2020-10-14 23:46:52,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:46:52,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:52,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:46:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:46:52,932 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2020-10-14 23:46:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:53,073 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-14 23:46:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:46:53,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 23:46:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:53,074 INFO L225 Difference]: With dead ends: 43 [2020-10-14 23:46:53,075 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:46:53,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:46:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:46:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 23:46:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 23:46:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-14 23:46:53,081 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-10-14 23:46:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:53,081 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-14 23:46:53,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:46:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-14 23:46:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:46:53,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:53,083 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:53,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:46:53,083 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash 362178451, now seen corresponding path program 10 times [2020-10-14 23:46:53,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:53,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56723884] [2020-10-14 23:46:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:53,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:53,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:53,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:46:53,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:53,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-14 23:46:53,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:53,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:46:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:46:53,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:53,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:53,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:53,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:53,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:53,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:53,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:53,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:53,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:53,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:53,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:53,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:53,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:53,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56723884] [2020-10-14 23:46:53,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:53,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:46:53,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224189367] [2020-10-14 23:46:53,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:46:53,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:46:53,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:46:53,709 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-14 23:46:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:53,856 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-14 23:46:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:46:53,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-14 23:46:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:53,858 INFO L225 Difference]: With dead ends: 45 [2020-10-14 23:46:53,858 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 23:46:53,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:46:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 23:46:53,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-14 23:46:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:46:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-14 23:46:53,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-14 23:46:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:53,864 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-14 23:46:53,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:46:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-14 23:46:53,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:46:53,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:53,865 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:53,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:46:53,865 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:53,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1686757776, now seen corresponding path program 11 times [2020-10-14 23:46:53,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:53,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698970433] [2020-10-14 23:46:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:53,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:53,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:54,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:54,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:46:54,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:54,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-14 23:46:54,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:54,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:54,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:46:54,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:54,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:46:54,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:54,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:54,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:54,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:54,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:54,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:54,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:54,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:54,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:54,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:54,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:54,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:54,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:54,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698970433] [2020-10-14 23:46:54,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:54,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:46:54,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533569267] [2020-10-14 23:46:54,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:46:54,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:54,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:46:54,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:46:54,727 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2020-10-14 23:46:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:54,916 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-14 23:46:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:46:54,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 23:46:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:54,918 INFO L225 Difference]: With dead ends: 47 [2020-10-14 23:46:54,918 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 23:46:54,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:46:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 23:46:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 23:46:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:46:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-14 23:46:54,924 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-10-14 23:46:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:54,925 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-14 23:46:54,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:46:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-14 23:46:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:46:54,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:54,926 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:54,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:46:54,927 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:54,927 INFO L82 PathProgramCache]: Analyzing trace with hash -997797811, now seen corresponding path program 12 times [2020-10-14 23:46:54,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:54,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50465129] [2020-10-14 23:46:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:54,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:55,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:55,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:55,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:46:55,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:55,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-14 23:46:55,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:55,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:55,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:46:55,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:55,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:46:55,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:55,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:55,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:55,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:55,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:55,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:55,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:46:55,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:55,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:55,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:55,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:55,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:55,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:55,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50465129] [2020-10-14 23:46:55,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:55,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:46:55,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399356001] [2020-10-14 23:46:55,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:46:55,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:55,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:46:55,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:46:55,710 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-14 23:46:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:55,935 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-14 23:46:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:46:55,935 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 23:46:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:55,936 INFO L225 Difference]: With dead ends: 49 [2020-10-14 23:46:55,936 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 23:46:55,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:46:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 23:46:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-14 23:46:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:46:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-14 23:46:55,942 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-10-14 23:46:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:55,942 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-14 23:46:55,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:46:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-14 23:46:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:46:55,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:55,944 INFO L422 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:55,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:46:55,944 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:55,944 INFO L82 PathProgramCache]: Analyzing trace with hash 419627978, now seen corresponding path program 13 times [2020-10-14 23:46:55,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:55,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756175104] [2020-10-14 23:46:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:55,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:56,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:56,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:56,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:46:56,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:56,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-14 23:46:56,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:56,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:46:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:46:56,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:56,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:56,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:56,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:56,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:56,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:56,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:56,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:56,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:56,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:56,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:56,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:56,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:56,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756175104] [2020-10-14 23:46:56,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:56,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:46:56,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638890239] [2020-10-14 23:46:56,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:46:56,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:46:56,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:46:56,815 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 15 states. [2020-10-14 23:46:57,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:57,084 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-14 23:46:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:46:57,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-14 23:46:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:57,087 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:46:57,087 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:46:57,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:46:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:46:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 23:46:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:46:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-14 23:46:57,100 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2020-10-14 23:46:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:57,100 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-14 23:46:57,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:46:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-14 23:46:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:46:57,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:57,101 INFO L422 BasicCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:57,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:46:57,102 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:57,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:57,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1061178375, now seen corresponding path program 14 times [2020-10-14 23:46:57,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:57,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066451032] [2020-10-14 23:46:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:57,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:57,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:46:57,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:57,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-14 23:46:57,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:57,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:46:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:57,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:46:57,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:57,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:57,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:57,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:57,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:57,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:57,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:57,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:57,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:57,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066451032] [2020-10-14 23:46:57,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:57,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:46:57,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062651767] [2020-10-14 23:46:57,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:46:57,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:57,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:46:57,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:46:57,931 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-14 23:46:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:58,180 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-14 23:46:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:46:58,181 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-14 23:46:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:58,182 INFO L225 Difference]: With dead ends: 53 [2020-10-14 23:46:58,182 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 23:46:58,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:46:58,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 23:46:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 23:46:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:46:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-14 23:46:58,190 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-14 23:46:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:58,190 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-14 23:46:58,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:46:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-14 23:46:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:46:58,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:58,192 INFO L422 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:58,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:46:58,192 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash -884180732, now seen corresponding path program 15 times [2020-10-14 23:46:58,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:58,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708805818] [2020-10-14 23:46:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:58,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:58,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:58,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:58,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:46:58,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:58,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-14 23:46:58,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:58,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:58,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:46:58,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:58,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:46:58,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:59,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:59,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:59,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:59,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:59,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:59,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:59,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:59,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:59,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:46:59,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708805818] [2020-10-14 23:46:59,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:59,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:46:59,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531825733] [2020-10-14 23:46:59,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:46:59,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:59,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:46:59,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:46:59,161 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 17 states. [2020-10-14 23:46:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:59,433 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-10-14 23:46:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:46:59,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-14 23:46:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:59,434 INFO L225 Difference]: With dead ends: 55 [2020-10-14 23:46:59,434 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 23:46:59,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:46:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 23:46:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-14 23:46:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 23:46:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-14 23:46:59,440 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-14 23:46:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:59,440 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-14 23:46:59,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:46:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-14 23:46:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:46:59,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:59,441 INFO L422 BasicCegarLoop]: trace histogram [17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:59,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:46:59,442 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:59,442 INFO L82 PathProgramCache]: Analyzing trace with hash -2063508799, now seen corresponding path program 16 times [2020-10-14 23:46:59,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:59,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176830536] [2020-10-14 23:46:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:59,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:59,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:00,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:00,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:47:00,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:00,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-14 23:47:00,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:00,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:00,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:47:00,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:00,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 23:47:00,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:00,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:00,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:00,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:00,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:00,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:00,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:00,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:00,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:00,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:00,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:00,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:00,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:00,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176830536] [2020-10-14 23:47:00,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:00,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:47:00,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169782153] [2020-10-14 23:47:00,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:47:00,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:00,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:47:00,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:47:00,350 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2020-10-14 23:47:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:00,692 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-14 23:47:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:47:00,693 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-14 23:47:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:00,693 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:47:00,693 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 23:47:00,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:47:00,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 23:47:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-14 23:47:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:47:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-14 23:47:00,699 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-14 23:47:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:00,699 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-14 23:47:00,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:47:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-14 23:47:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:47:00,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:00,700 INFO L422 BasicCegarLoop]: trace histogram [18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:00,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:47:00,701 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1526415042, now seen corresponding path program 17 times [2020-10-14 23:47:00,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:00,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921874818] [2020-10-14 23:47:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:00,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:01,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:01,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:47:01,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:01,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 796 [2020-10-14 23:47:01,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:01,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:47:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 23:47:01,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:01,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:01,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:01,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:01,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:01,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:01,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:01,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:01,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:01,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:01,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921874818] [2020-10-14 23:47:01,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:01,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:47:01,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688274473] [2020-10-14 23:47:01,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:47:01,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:01,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:47:01,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:47:01,812 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 19 states. [2020-10-14 23:47:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:02,176 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-14 23:47:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:47:02,177 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 23:47:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:02,178 INFO L225 Difference]: With dead ends: 59 [2020-10-14 23:47:02,178 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 23:47:02,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:47:02,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 23:47:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 23:47:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:47:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-14 23:47:02,185 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-10-14 23:47:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:02,186 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-14 23:47:02,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:47:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-14 23:47:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:47:02,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:02,187 INFO L422 BasicCegarLoop]: trace histogram [19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:02,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:47:02,187 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:02,187 INFO L82 PathProgramCache]: Analyzing trace with hash -775390085, now seen corresponding path program 18 times [2020-10-14 23:47:02,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:02,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161523269] [2020-10-14 23:47:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:02,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:03,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:03,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:47:03,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:03,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-14 23:47:03,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:03,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:03,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:47:03,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:03,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 23:47:03,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:03,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:03,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:03,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:03,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:03,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:03,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:03,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:03,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:03,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:03,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:03,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:03,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:03,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161523269] [2020-10-14 23:47:03,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:03,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:47:03,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167216724] [2020-10-14 23:47:03,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:47:03,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:47:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:47:03,481 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 20 states. [2020-10-14 23:47:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:03,879 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-14 23:47:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:47:03,879 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-14 23:47:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:03,880 INFO L225 Difference]: With dead ends: 61 [2020-10-14 23:47:03,880 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:47:03,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:47:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:47:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-14 23:47:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:47:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-14 23:47:03,886 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-10-14 23:47:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:03,886 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-14 23:47:03,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:47:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-14 23:47:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:47:03,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:03,887 INFO L422 BasicCegarLoop]: trace histogram [20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:03,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:47:03,887 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:03,888 INFO L82 PathProgramCache]: Analyzing trace with hash -594912136, now seen corresponding path program 19 times [2020-10-14 23:47:03,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:03,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880360459] [2020-10-14 23:47:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:03,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:04,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:04,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:04,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:47:04,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:04,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-14 23:47:04,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:04,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:04,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:47:04,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:04,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:47:04,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:04,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:04,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:04,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:04,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:04,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:04,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:04,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:04,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:04,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:04,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880360459] [2020-10-14 23:47:04,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:04,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:47:04,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594630817] [2020-10-14 23:47:04,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:47:04,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:04,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:47:04,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:47:04,795 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 21 states. [2020-10-14 23:47:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:05,181 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-10-14 23:47:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:47:05,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-14 23:47:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:05,182 INFO L225 Difference]: With dead ends: 63 [2020-10-14 23:47:05,182 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 23:47:05,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:47:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 23:47:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 23:47:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:47:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-14 23:47:05,193 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-10-14 23:47:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:05,193 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-14 23:47:05,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:47:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-14 23:47:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:47:05,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:05,194 INFO L422 BasicCegarLoop]: trace histogram [21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:05,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:47:05,194 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:05,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1045705013, now seen corresponding path program 20 times [2020-10-14 23:47:05,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:05,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191201882] [2020-10-14 23:47:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:05,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:05,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:06,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:06,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:47:06,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:06,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 832 [2020-10-14 23:47:06,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:06,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:06,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:47:06,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:06,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 23:47:06,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:06,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:06,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:06,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:06,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:06,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:06,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:06,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:06,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:06,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:06,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:06,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:06,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:06,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191201882] [2020-10-14 23:47:06,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:06,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:47:06,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902634206] [2020-10-14 23:47:06,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:47:06,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:06,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:47:06,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:47:06,391 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 22 states. [2020-10-14 23:47:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:06,936 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-10-14 23:47:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:47:06,939 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 23:47:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:06,939 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:47:06,939 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 23:47:06,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:47:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 23:47:06,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-14 23:47:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:47:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-14 23:47:06,949 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-10-14 23:47:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:06,949 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-14 23:47:06,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:47:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-14 23:47:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 23:47:06,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:06,950 INFO L422 BasicCegarLoop]: trace histogram [22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:06,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:47:06,950 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1425787570, now seen corresponding path program 21 times [2020-10-14 23:47:06,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:06,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211778350] [2020-10-14 23:47:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:06,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:07,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:47:07,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:07,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-14 23:47:07,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:07,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:47:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 23:47:07,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:08,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:08,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:08,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:08,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:08,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:08,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:08,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:08,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:08,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:08,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:08,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211778350] [2020-10-14 23:47:08,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:08,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:47:08,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755877743] [2020-10-14 23:47:08,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:47:08,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:08,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:47:08,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:47:08,055 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 23 states. [2020-10-14 23:47:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:08,658 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-10-14 23:47:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:47:08,658 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-14 23:47:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:08,659 INFO L225 Difference]: With dead ends: 67 [2020-10-14 23:47:08,659 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 23:47:08,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:47:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 23:47:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-14 23:47:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 23:47:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-14 23:47:08,667 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-10-14 23:47:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:08,667 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-14 23:47:08,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:47:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-14 23:47:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:47:08,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:08,668 INFO L422 BasicCegarLoop]: trace histogram [23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:08,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:47:08,670 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:08,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1612904687, now seen corresponding path program 22 times [2020-10-14 23:47:08,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:08,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359002612] [2020-10-14 23:47:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:08,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:08,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:09,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:09,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:47:09,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:09,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-14 23:47:09,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:09,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:09,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:47:09,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:09,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 23:47:09,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:09,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:09,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:09,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:09,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:09,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:09,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:09,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:09,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:09,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359002612] [2020-10-14 23:47:09,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:09,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:47:09,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389689160] [2020-10-14 23:47:09,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:47:09,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:09,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:47:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:47:09,819 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 24 states. [2020-10-14 23:47:10,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:10,426 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-10-14 23:47:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:47:10,427 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-14 23:47:10,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:10,428 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:47:10,428 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:47:10,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:47:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:47:10,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-14 23:47:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:47:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-14 23:47:10,434 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2020-10-14 23:47:10,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:10,434 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-14 23:47:10,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:47:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-14 23:47:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:47:10,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:10,435 INFO L422 BasicCegarLoop]: trace histogram [24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:10,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:47:10,435 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:10,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:10,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1043827692, now seen corresponding path program 23 times [2020-10-14 23:47:10,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:10,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664773644] [2020-10-14 23:47:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:10,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:10,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:11,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:11,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:47:11,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:11,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 946 [2020-10-14 23:47:11,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:11,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:11,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:47:11,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:11,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 23:47:11,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:11,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:11,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:11,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:11,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:11,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:11,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:11,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:11,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:11,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:11,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:11,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664773644] [2020-10-14 23:47:11,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:11,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:47:11,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036102758] [2020-10-14 23:47:11,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:47:11,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:11,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:47:11,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:47:11,995 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 25 states. [2020-10-14 23:47:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:12,645 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-10-14 23:47:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:47:12,649 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-14 23:47:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:12,650 INFO L225 Difference]: With dead ends: 71 [2020-10-14 23:47:12,650 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 23:47:12,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:47:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 23:47:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-14 23:47:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 23:47:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-14 23:47:12,655 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2020-10-14 23:47:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:12,656 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-14 23:47:12,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:47:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-14 23:47:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:47:12,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:12,657 INFO L422 BasicCegarLoop]: trace histogram [25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:12,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:47:12,657 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:12,657 INFO L82 PathProgramCache]: Analyzing trace with hash -378317911, now seen corresponding path program 24 times [2020-10-14 23:47:12,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:12,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988184334] [2020-10-14 23:47:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:12,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:12,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:13,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:47:13,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:13,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1305 [2020-10-14 23:47:13,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:13,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:47:13,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:13,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 23:47:13,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:14,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:14,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:14,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:14,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:14,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:14,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:14,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:14,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:14,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:14,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:14,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:14,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:14,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988184334] [2020-10-14 23:47:14,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:14,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:47:14,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000293233] [2020-10-14 23:47:14,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:47:14,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:14,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:47:14,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:47:14,637 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 26 states. [2020-10-14 23:47:15,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:15,438 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-14 23:47:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:47:15,439 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-14 23:47:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:15,440 INFO L225 Difference]: With dead ends: 73 [2020-10-14 23:47:15,441 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 23:47:15,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:47:15,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 23:47:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-14 23:47:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 23:47:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-14 23:47:15,450 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-14 23:47:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:15,451 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-14 23:47:15,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:47:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-14 23:47:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:47:15,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:15,453 INFO L422 BasicCegarLoop]: trace histogram [26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:15,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:47:15,454 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:15,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:15,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1260642266, now seen corresponding path program 25 times [2020-10-14 23:47:15,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:15,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519046173] [2020-10-14 23:47:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:15,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:16,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:16,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:16,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 23:47:16,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:16,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-14 23:47:16,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:16,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:16,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:47:16,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 23:47:16,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:17,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:17,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:17,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:17,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:17,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:17,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:17,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:17,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:17,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:17,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519046173] [2020-10-14 23:47:17,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:17,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:47:17,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943865890] [2020-10-14 23:47:17,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:47:17,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:17,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:47:17,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:47:17,597 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 27 states. [2020-10-14 23:47:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:18,313 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-10-14 23:47:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:47:18,314 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-14 23:47:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:18,315 INFO L225 Difference]: With dead ends: 75 [2020-10-14 23:47:18,315 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 23:47:18,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:47:18,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 23:47:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 23:47:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 23:47:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-14 23:47:18,321 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-14 23:47:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:18,321 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-14 23:47:18,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:47:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-14 23:47:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 23:47:18,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:18,322 INFO L422 BasicCegarLoop]: trace histogram [27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:18,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:47:18,323 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:18,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1229177187, now seen corresponding path program 26 times [2020-10-14 23:47:18,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:18,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458909760] [2020-10-14 23:47:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:18,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:19,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:19,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 23:47:19,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:19,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-14 23:47:19,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:19,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:19,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:47:19,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:19,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 23:47:19,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:20,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:20,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:20,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:20,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:20,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:20,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:20,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:20,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:20,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:20,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458909760] [2020-10-14 23:47:20,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:20,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:47:20,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246834175] [2020-10-14 23:47:20,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:47:20,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:20,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:47:20,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:47:20,021 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 28 states. [2020-10-14 23:47:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:20,832 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-10-14 23:47:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:47:20,833 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-14 23:47:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:20,834 INFO L225 Difference]: With dead ends: 77 [2020-10-14 23:47:20,834 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 23:47:20,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:47:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 23:47:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 23:47:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 23:47:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-14 23:47:20,839 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2020-10-14 23:47:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:20,840 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-14 23:47:20,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:47:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-14 23:47:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 23:47:20,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:20,843 INFO L422 BasicCegarLoop]: trace histogram [28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:20,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:47:20,844 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:20,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1648887648, now seen corresponding path program 27 times [2020-10-14 23:47:20,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:20,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942838818] [2020-10-14 23:47:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:20,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:21,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:21,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:21,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 23:47:21,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:21,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-14 23:47:21,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:21,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:21,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 23:47:21,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:21,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 23:47:21,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:22,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:22,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:22,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:22,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:22,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:22,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:22,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:22,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:22,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:22,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:47:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:22,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942838818] [2020-10-14 23:47:22,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:22,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 23:47:22,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113741209] [2020-10-14 23:47:22,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 23:47:22,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 23:47:22,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:47:22,539 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 29 states. [2020-10-14 23:47:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:23,464 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-10-14 23:47:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:47:23,465 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-14 23:47:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:23,466 INFO L225 Difference]: With dead ends: 79 [2020-10-14 23:47:23,466 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 23:47:23,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:47:23,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 23:47:23,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-14 23:47:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 23:47:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-14 23:47:23,472 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2020-10-14 23:47:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:23,472 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-14 23:47:23,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 23:47:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-14 23:47:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 23:47:23,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:23,473 INFO L422 BasicCegarLoop]: trace histogram [29, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:23,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:47:23,473 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1263714845, now seen corresponding path program 28 times [2020-10-14 23:47:23,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:23,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505756095] [2020-10-14 23:47:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:23,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:24,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:24,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:47:24,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:24,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 796 [2020-10-14 23:47:24,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:24,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 23:47:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:24,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 23:47:24,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:24,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:24,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:24,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:24,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:24,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:24,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:24,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:24,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:24,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:24,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:24,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:24,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:47:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:24,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505756095] [2020-10-14 23:47:24,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:24,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 23:47:24,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666906533] [2020-10-14 23:47:24,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 23:47:24,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:24,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 23:47:24,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:47:24,989 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 30 states. [2020-10-14 23:47:25,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:25,928 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-14 23:47:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:47:25,929 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-14 23:47:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:25,930 INFO L225 Difference]: With dead ends: 81 [2020-10-14 23:47:25,931 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 23:47:25,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:47:25,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 23:47:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-14 23:47:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 23:47:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-14 23:47:25,937 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2020-10-14 23:47:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:25,937 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-14 23:47:25,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 23:47:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-14 23:47:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:47:25,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:25,938 INFO L422 BasicCegarLoop]: trace histogram [30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:25,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:47:25,939 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash 479838618, now seen corresponding path program 29 times [2020-10-14 23:47:25,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:25,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138474136] [2020-10-14 23:47:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:25,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:26,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:26,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:26,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 23:47:26,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:26,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-14 23:47:26,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:26,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:26,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 23:47:26,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:26,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 23:47:26,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:27,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:27,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:27,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:27,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:27,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:27,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:27,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:27,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:27,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138474136] [2020-10-14 23:47:27,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:27,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:47:27,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124295795] [2020-10-14 23:47:27,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:47:27,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:27,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:47:27,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:47:27,396 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 31 states. [2020-10-14 23:47:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:28,416 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-10-14 23:47:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:47:28,416 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-14 23:47:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:28,418 INFO L225 Difference]: With dead ends: 83 [2020-10-14 23:47:28,418 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 23:47:28,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:47:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 23:47:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-14 23:47:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 23:47:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-14 23:47:28,425 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2020-10-14 23:47:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:28,425 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-14 23:47:28,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:47:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-14 23:47:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 23:47:28,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:28,426 INFO L422 BasicCegarLoop]: trace histogram [31, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:28,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:47:28,426 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:28,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1205938729, now seen corresponding path program 30 times [2020-10-14 23:47:28,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:28,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853539455] [2020-10-14 23:47:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:28,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:29,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:29,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 23:47:29,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1077 [2020-10-14 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:30,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:30,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:30,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:30,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:30,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:30,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:30,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:30,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:30,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:30,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:30,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:30,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:30,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853539455] [2020-10-14 23:47:30,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:30,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 23:47:30,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085487915] [2020-10-14 23:47:30,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 23:47:30,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:30,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 23:47:30,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:47:30,225 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 32 states. [2020-10-14 23:47:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:31,293 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-14 23:47:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:47:31,294 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-14 23:47:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:31,295 INFO L225 Difference]: With dead ends: 85 [2020-10-14 23:47:31,295 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 23:47:31,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:47:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 23:47:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-14 23:47:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 23:47:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-14 23:47:31,301 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2020-10-14 23:47:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:31,302 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-14 23:47:31,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 23:47:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-14 23:47:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 23:47:31,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:31,303 INFO L422 BasicCegarLoop]: trace histogram [32, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:31,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:47:31,303 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2035298604, now seen corresponding path program 31 times [2020-10-14 23:47:31,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:31,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066675929] [2020-10-14 23:47:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:31,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:31,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:32,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:32,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 23:47:32,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:32,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1314 [2020-10-14 23:47:32,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:32,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:32,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 23:47:32,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:32,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 23:47:32,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:33,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:33,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:33,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:33,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:33,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:33,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:33,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:33,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:33,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:33,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066675929] [2020-10-14 23:47:33,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:33,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 23:47:33,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485250142] [2020-10-14 23:47:33,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 23:47:33,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:33,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 23:47:33,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:47:33,404 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 33 states. [2020-10-14 23:47:34,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:34,619 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-10-14 23:47:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:47:34,620 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-14 23:47:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:34,621 INFO L225 Difference]: With dead ends: 87 [2020-10-14 23:47:34,621 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 23:47:34,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:47:34,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 23:47:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-14 23:47:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 23:47:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-14 23:47:34,628 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2020-10-14 23:47:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:34,629 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-14 23:47:34,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 23:47:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-14 23:47:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 23:47:34,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:34,630 INFO L422 BasicCegarLoop]: trace histogram [33, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:34,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:47:34,630 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash -186221423, now seen corresponding path program 32 times [2020-10-14 23:47:34,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:34,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968350122] [2020-10-14 23:47:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:34,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:35,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:35,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:35,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 23:47:35,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:35,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-14 23:47:35,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:35,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:35,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 23:47:35,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:35,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 23:47:35,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:36,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:36,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:36,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:36,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:36,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:36,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:36,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:36,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968350122] [2020-10-14 23:47:36,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:36,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 23:47:36,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550453889] [2020-10-14 23:47:36,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 23:47:36,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:36,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 23:47:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:47:36,689 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 34 states. [2020-10-14 23:47:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:37,926 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-10-14 23:47:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:47:37,927 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-14 23:47:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:37,928 INFO L225 Difference]: With dead ends: 89 [2020-10-14 23:47:37,928 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 23:47:37,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:47:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 23:47:37,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-14 23:47:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 23:47:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-14 23:47:37,935 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2020-10-14 23:47:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:37,935 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-14 23:47:37,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 23:47:37,936 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-14 23:47:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 23:47:37,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:37,936 INFO L422 BasicCegarLoop]: trace histogram [34, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:37,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:47:37,936 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:37,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1339511026, now seen corresponding path program 33 times [2020-10-14 23:47:37,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:37,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709234734] [2020-10-14 23:47:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:37,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:38,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:39,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 23:47:39,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:39,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1547 [2020-10-14 23:47:39,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:39,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:39,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 23:47:39,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:39,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 23:47:39,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:40,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:40,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:40,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:40,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:40,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:40,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:40,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:40,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:40,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:40,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:40,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:40,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:40,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709234734] [2020-10-14 23:47:40,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:40,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 23:47:40,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324374089] [2020-10-14 23:47:40,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 23:47:40,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:40,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 23:47:40,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:47:40,331 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 35 states. [2020-10-14 23:47:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:41,644 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-14 23:47:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 23:47:41,645 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-14 23:47:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:41,646 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:47:41,646 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 23:47:41,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:47:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 23:47:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-14 23:47:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 23:47:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-14 23:47:41,652 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2020-10-14 23:47:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:41,653 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-14 23:47:41,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 23:47:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-14 23:47:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 23:47:41,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:41,654 INFO L422 BasicCegarLoop]: trace histogram [35, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:41,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:47:41,654 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:41,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1549257141, now seen corresponding path program 34 times [2020-10-14 23:47:41,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:41,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182007674] [2020-10-14 23:47:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:41,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:41,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:43,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:43,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 23:47:43,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:43,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-14 23:47:43,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:43,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:43,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 23:47:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 23:47:43,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:44,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:44,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:44,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:44,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:44,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:44,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:44,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:44,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:44,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:44,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182007674] [2020-10-14 23:47:44,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:44,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 23:47:44,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125071817] [2020-10-14 23:47:44,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 23:47:44,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 23:47:44,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:47:44,331 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 36 states. [2020-10-14 23:47:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:45,777 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-10-14 23:47:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:47:45,778 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-14 23:47:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:45,779 INFO L225 Difference]: With dead ends: 93 [2020-10-14 23:47:45,779 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 23:47:45,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:47:45,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 23:47:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-14 23:47:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 23:47:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-14 23:47:45,786 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2020-10-14 23:47:45,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:45,786 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-14 23:47:45,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 23:47:45,786 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-14 23:47:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 23:47:45,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:45,787 INFO L422 BasicCegarLoop]: trace histogram [36, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:45,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:47:45,787 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:45,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1251810744, now seen corresponding path program 35 times [2020-10-14 23:47:45,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:45,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280805884] [2020-10-14 23:47:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:45,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:45,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:47,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:47,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 23:47:47,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:47,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1217 [2020-10-14 23:47:47,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:47,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:47,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 23:47:47,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:47,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 23:47:47,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:47,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:47,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:47,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:47,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:47,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:47,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:47,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:47,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:47,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:47,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:47,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:47,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:47,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280805884] [2020-10-14 23:47:47,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:47,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 23:47:47,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246112210] [2020-10-14 23:47:47,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 23:47:47,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:47,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 23:47:47,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:47:47,966 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 37 states. [2020-10-14 23:47:49,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:49,498 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-10-14 23:47:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 23:47:49,498 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-14 23:47:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:49,499 INFO L225 Difference]: With dead ends: 95 [2020-10-14 23:47:49,500 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 23:47:49,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:47:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 23:47:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-14 23:47:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 23:47:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-14 23:47:49,507 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2020-10-14 23:47:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:49,507 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-14 23:47:49,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 23:47:49,508 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-14 23:47:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 23:47:49,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:49,508 INFO L422 BasicCegarLoop]: trace histogram [37, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:49,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:47:49,509 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1126335237, now seen corresponding path program 36 times [2020-10-14 23:47:49,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:49,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424809001] [2020-10-14 23:47:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:49,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:50,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:51,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:51,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 23:47:51,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:51,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1620 [2020-10-14 23:47:51,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:51,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 23:47:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 23:47:51,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:52,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:52,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:52,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:52,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:52,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:52,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:52,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:52,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:52,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:52,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:52,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:52,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:52,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424809001] [2020-10-14 23:47:52,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:52,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 23:47:52,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32638727] [2020-10-14 23:47:52,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 23:47:52,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:52,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 23:47:52,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:47:52,083 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 38 states. [2020-10-14 23:47:53,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:53,669 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-10-14 23:47:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 23:47:53,670 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-14 23:47:53,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:53,671 INFO L225 Difference]: With dead ends: 97 [2020-10-14 23:47:53,671 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 23:47:53,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:47:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 23:47:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-14 23:47:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:47:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-14 23:47:53,677 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2020-10-14 23:47:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:53,678 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-14 23:47:53,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 23:47:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-14 23:47:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 23:47:53,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:53,679 INFO L422 BasicCegarLoop]: trace histogram [38, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:53,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:47:53,679 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:53,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:53,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1602021506, now seen corresponding path program 37 times [2020-10-14 23:47:53,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:53,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970512201] [2020-10-14 23:47:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:53,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:54,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:55,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:55,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 23:47:55,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:55,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1927 [2020-10-14 23:47:55,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:55,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:55,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 23:47:55,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:55,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 23:47:55,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:56,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:56,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:56,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:56,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:56,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:56,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:56,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:56,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:47:56,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970512201] [2020-10-14 23:47:56,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:56,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 23:47:56,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546654317] [2020-10-14 23:47:56,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 23:47:56,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:56,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 23:47:56,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:47:56,682 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 39 states. [2020-10-14 23:47:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:58,453 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-10-14 23:47:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 23:47:58,454 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-14 23:47:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:58,455 INFO L225 Difference]: With dead ends: 99 [2020-10-14 23:47:58,455 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 23:47:58,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:47:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 23:47:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-14 23:47:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 23:47:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-14 23:47:58,462 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2020-10-14 23:47:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:58,463 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-14 23:47:58,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 23:47:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-14 23:47:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 23:47:58,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:58,464 INFO L422 BasicCegarLoop]: trace histogram [39, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:58,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:47:58,464 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:58,465 INFO L82 PathProgramCache]: Analyzing trace with hash -824974657, now seen corresponding path program 38 times [2020-10-14 23:47:58,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:58,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018994582] [2020-10-14 23:47:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:58,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:59,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:00,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:00,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 23:48:00,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1773 [2020-10-14 23:48:00,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:00,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 23:48:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:00,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 23:48:00,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:01,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:01,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:01,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:01,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:01,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:01,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:01,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:01,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:01,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:01,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:01,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:01,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:48:01,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018994582] [2020-10-14 23:48:01,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:01,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 23:48:01,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159510815] [2020-10-14 23:48:01,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 23:48:01,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:01,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 23:48:01,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:48:01,323 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 40 states. [2020-10-14 23:48:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:03,101 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2020-10-14 23:48:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 23:48:03,102 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-14 23:48:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:03,103 INFO L225 Difference]: With dead ends: 101 [2020-10-14 23:48:03,103 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 23:48:03,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:48:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 23:48:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-14 23:48:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 23:48:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-14 23:48:03,109 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2020-10-14 23:48:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:03,110 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-14 23:48:03,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 23:48:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-14 23:48:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 23:48:03,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:03,111 INFO L422 BasicCegarLoop]: trace histogram [40, 38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:03,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:48:03,111 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:03,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1001045572, now seen corresponding path program 39 times [2020-10-14 23:48:03,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:03,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885381335] [2020-10-14 23:48:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:03,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:03,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:05,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:05,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 23:48:05,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:05,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2040 [2020-10-14 23:48:05,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:05,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:05,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 23:48:05,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:05,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-14 23:48:05,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:06,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:06,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:06,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:06,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:06,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:06,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:06,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:06,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:06,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:06,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:06,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:06,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:48:06,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885381335] [2020-10-14 23:48:06,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:06,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 23:48:06,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156615501] [2020-10-14 23:48:06,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 23:48:06,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 23:48:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:48:06,353 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2020-10-14 23:48:08,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:08,291 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-10-14 23:48:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 23:48:08,291 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-14 23:48:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:08,292 INFO L225 Difference]: With dead ends: 103 [2020-10-14 23:48:08,293 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 23:48:08,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:48:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 23:48:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-14 23:48:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 23:48:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-14 23:48:08,300 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2020-10-14 23:48:08,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:08,300 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-14 23:48:08,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 23:48:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-14 23:48:08,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 23:48:08,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:08,302 INFO L422 BasicCegarLoop]: trace histogram [41, 39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:08,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:48:08,302 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:08,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:08,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1593496953, now seen corresponding path program 40 times [2020-10-14 23:48:08,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:08,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4691737] [2020-10-14 23:48:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:08,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:09,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:10,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:10,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 23:48:10,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:10,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2072 [2020-10-14 23:48:10,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:10,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 23:48:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 23:48:10,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:11,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:11,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:11,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:11,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:11,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:11,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:11,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:11,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:11,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:11,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:11,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:11,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:48:11,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4691737] [2020-10-14 23:48:11,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:11,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 23:48:11,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522451754] [2020-10-14 23:48:11,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 23:48:11,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:11,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 23:48:11,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:48:11,568 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 42 states. [2020-10-14 23:48:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:13,520 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-10-14 23:48:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 23:48:13,521 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-14 23:48:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:13,522 INFO L225 Difference]: With dead ends: 105 [2020-10-14 23:48:13,522 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 23:48:13,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:48:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 23:48:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-14 23:48:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:48:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-14 23:48:13,534 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2020-10-14 23:48:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:13,534 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-14 23:48:13,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 23:48:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-14 23:48:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 23:48:13,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:13,535 INFO L422 BasicCegarLoop]: trace histogram [42, 40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:13,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:48:13,536 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:13,536 INFO L82 PathProgramCache]: Analyzing trace with hash -427135498, now seen corresponding path program 41 times [2020-10-14 23:48:13,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:13,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247091084] [2020-10-14 23:48:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:13,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:13,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:15,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:15,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 23:48:15,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:15,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1737 [2020-10-14 23:48:15,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:15,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:15,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 23:48:15,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:15,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-14 23:48:15,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:16,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:16,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:16,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:16,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:16,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:16,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:16,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:16,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:16,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:48:16,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247091084] [2020-10-14 23:48:16,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:16,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 23:48:16,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424134214] [2020-10-14 23:48:16,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 23:48:16,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:16,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 23:48:16,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:48:16,501 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 43 states. [2020-10-14 23:48:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:18,587 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-10-14 23:48:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 23:48:18,587 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-14 23:48:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:18,589 INFO L225 Difference]: With dead ends: 107 [2020-10-14 23:48:18,589 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 23:48:18,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:48:18,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 23:48:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-14 23:48:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:48:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-14 23:48:18,596 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2020-10-14 23:48:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:18,597 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-14 23:48:18,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 23:48:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-14 23:48:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 23:48:18,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:18,598 INFO L422 BasicCegarLoop]: trace histogram [43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:18,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:48:18,598 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:18,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:18,598 INFO L82 PathProgramCache]: Analyzing trace with hash -929703117, now seen corresponding path program 42 times [2020-10-14 23:48:18,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:18,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961068660] [2020-10-14 23:48:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:18,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:21,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:21,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 23:48:21,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:21,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2432 [2020-10-14 23:48:21,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:21,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:21,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 23:48:21,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:21,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-14 23:48:21,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:22,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:22,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:22,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:22,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:22,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:22,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:22,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:22,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:22,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1722 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:48:22,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961068660] [2020-10-14 23:48:22,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:22,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 23:48:22,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700691767] [2020-10-14 23:48:22,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 23:48:22,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:22,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 23:48:22,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:48:22,383 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 44 states. [2020-10-14 23:48:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:24,559 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-14 23:48:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 23:48:24,559 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-14 23:48:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:24,561 INFO L225 Difference]: With dead ends: 109 [2020-10-14 23:48:24,561 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 23:48:24,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:48:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 23:48:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-14 23:48:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 23:48:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-14 23:48:24,568 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2020-10-14 23:48:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:24,569 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-14 23:48:24,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 23:48:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-14 23:48:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 23:48:24,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:24,570 INFO L422 BasicCegarLoop]: trace histogram [44, 42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:24,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:48:24,570 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:24,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:24,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1434119472, now seen corresponding path program 43 times [2020-10-14 23:48:24,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:24,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646186671] [2020-10-14 23:48:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:24,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:25,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:27,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:27,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 23:48:27,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:27,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3076 [2020-10-14 23:48:27,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:27,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:27,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 23:48:27,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:27,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 23:48:27,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:28,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:28,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:28,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:28,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:28,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:28,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:28,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:28,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:28,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:28,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:28,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:28,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:48:28,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646186671] [2020-10-14 23:48:28,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:28,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 23:48:28,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135669255] [2020-10-14 23:48:28,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 23:48:28,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:28,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 23:48:28,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:48:28,977 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 45 states. [2020-10-14 23:48:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:31,236 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2020-10-14 23:48:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 23:48:31,237 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-14 23:48:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:31,238 INFO L225 Difference]: With dead ends: 111 [2020-10-14 23:48:31,239 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 23:48:31,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:48:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 23:48:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-14 23:48:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 23:48:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-14 23:48:31,246 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2020-10-14 23:48:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:31,247 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-14 23:48:31,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 23:48:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-14 23:48:31,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 23:48:31,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:31,248 INFO L422 BasicCegarLoop]: trace histogram [45, 43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:31,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:48:31,248 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:31,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:31,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1029927917, now seen corresponding path program 44 times [2020-10-14 23:48:31,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:31,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875695632] [2020-10-14 23:48:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:31,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:32,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:33,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:33,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 23:48:33,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:33,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2297 [2020-10-14 23:48:33,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:33,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 23:48:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-14 23:48:33,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:34,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:34,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:34,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:34,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:34,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:34,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:34,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:34,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:34,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:34,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:34,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:34,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:48:35,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875695632] [2020-10-14 23:48:35,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:35,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 23:48:35,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321769338] [2020-10-14 23:48:35,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 23:48:35,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:35,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 23:48:35,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:48:35,014 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 46 states. [2020-10-14 23:48:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:37,465 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-10-14 23:48:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 23:48:37,466 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-14 23:48:37,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:37,467 INFO L225 Difference]: With dead ends: 113 [2020-10-14 23:48:37,467 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 23:48:37,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:48:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 23:48:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-14 23:48:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 23:48:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-10-14 23:48:37,474 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2020-10-14 23:48:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:37,475 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-10-14 23:48:37,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 23:48:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-10-14 23:48:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 23:48:37,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:37,476 INFO L422 BasicCegarLoop]: trace histogram [46, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:37,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:48:37,476 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:37,476 INFO L82 PathProgramCache]: Analyzing trace with hash -851099798, now seen corresponding path program 45 times [2020-10-14 23:48:37,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:37,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963518402] [2020-10-14 23:48:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:37,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:40,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:40,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 23:48:40,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:40,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2935 [2020-10-14 23:48:40,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:40,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 23:48:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:40,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-14 23:48:40,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:41,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:41,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:41,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:41,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:41,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:41,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:41,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:41,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:41,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:41,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:41,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:41,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:48:41,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963518402] [2020-10-14 23:48:41,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:41,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 23:48:41,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413503599] [2020-10-14 23:48:41,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 23:48:41,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 23:48:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:48:41,879 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 47 states. [2020-10-14 23:48:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:44,353 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-10-14 23:48:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 23:48:44,354 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-14 23:48:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:44,355 INFO L225 Difference]: With dead ends: 115 [2020-10-14 23:48:44,355 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 23:48:44,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:48:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 23:48:44,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-14 23:48:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 23:48:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-10-14 23:48:44,360 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2020-10-14 23:48:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:44,361 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-10-14 23:48:44,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 23:48:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-10-14 23:48:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 23:48:44,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:44,362 INFO L422 BasicCegarLoop]: trace histogram [47, 45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:44,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:48:44,362 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash -337502297, now seen corresponding path program 46 times [2020-10-14 23:48:44,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:44,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145856431] [2020-10-14 23:48:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:44,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:44,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:46,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:46,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 23:48:46,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:46,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2032 [2020-10-14 23:48:46,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:46,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 23:48:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-14 23:48:46,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:47,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:47,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:47,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:47,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:47,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:47,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:47,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:47,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:47,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:48:48,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145856431] [2020-10-14 23:48:48,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:48,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 23:48:48,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781749526] [2020-10-14 23:48:48,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 23:48:48,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:48,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 23:48:48,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:48:48,009 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 48 states. [2020-10-14 23:48:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:50,746 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-10-14 23:48:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 23:48:50,747 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-14 23:48:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:50,748 INFO L225 Difference]: With dead ends: 117 [2020-10-14 23:48:50,748 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 23:48:50,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:48:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 23:48:50,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-14 23:48:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:48:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-14 23:48:50,755 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2020-10-14 23:48:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:50,755 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-14 23:48:50,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 23:48:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-14 23:48:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 23:48:50,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:50,756 INFO L422 BasicCegarLoop]: trace histogram [48, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:50,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:48:50,756 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:50,756 INFO L82 PathProgramCache]: Analyzing trace with hash -691542876, now seen corresponding path program 47 times [2020-10-14 23:48:50,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:50,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814475214] [2020-10-14 23:48:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:50,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:51,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:53,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:53,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 23:48:53,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:53,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2920 [2020-10-14 23:48:53,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:53,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:53,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 23:48:53,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:53,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-14 23:48:53,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:55,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:55,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:55,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:55,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:55,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:55,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:55,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:55,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:55,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:55,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:55,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:55,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 2162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:48:55,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814475214] [2020-10-14 23:48:55,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:55,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 23:48:55,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414463700] [2020-10-14 23:48:55,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 23:48:55,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:55,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 23:48:55,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:48:55,265 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 49 states. [2020-10-14 23:48:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:57,984 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2020-10-14 23:48:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 23:48:57,985 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-14 23:48:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:57,985 INFO L225 Difference]: With dead ends: 119 [2020-10-14 23:48:57,986 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 23:48:57,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:48:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 23:48:57,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-14 23:48:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 23:48:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-10-14 23:48:57,991 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 106 [2020-10-14 23:48:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:57,991 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-10-14 23:48:57,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 23:48:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-10-14 23:48:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 23:48:57,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:57,993 INFO L422 BasicCegarLoop]: trace histogram [49, 47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:57,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:48:57,993 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:57,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1622122911, now seen corresponding path program 48 times [2020-10-14 23:48:57,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:57,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375898951] [2020-10-14 23:48:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:58,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:00,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:00,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 23:49:00,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:49:00,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2166 [2020-10-14 23:49:00,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:00,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:00,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 23:49:00,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:00,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-14 23:49:00,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:01,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:01,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:01,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:01,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:01,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:01,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:01,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:01,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:01,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:01,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:01,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:01,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:49:01,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375898951] [2020-10-14 23:49:01,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:01,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 23:49:01,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541212816] [2020-10-14 23:49:01,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 23:49:01,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 23:49:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:49:01,900 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 50 states. [2020-10-14 23:49:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:04,814 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2020-10-14 23:49:04,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 23:49:04,815 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-14 23:49:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:04,816 INFO L225 Difference]: With dead ends: 121 [2020-10-14 23:49:04,816 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 23:49:04,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:49:04,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 23:49:04,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-14 23:49:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 23:49:04,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-10-14 23:49:04,822 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2020-10-14 23:49:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:04,823 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-10-14 23:49:04,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 23:49:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-10-14 23:49:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 23:49:04,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:04,824 INFO L422 BasicCegarLoop]: trace histogram [50, 48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:04,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:49:04,824 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:04,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1738628318, now seen corresponding path program 49 times [2020-10-14 23:49:04,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:04,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362465338] [2020-10-14 23:49:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:04,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:04,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:07,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:07,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 23:49:07,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:49:07,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2625 [2020-10-14 23:49:07,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:07,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 23:49:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-14 23:49:07,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:09,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:09,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:09,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:09,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:09,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:09,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:09,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:09,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:09,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:09,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:09,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:09,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:49:09,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362465338] [2020-10-14 23:49:09,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:09,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 23:49:09,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100746257] [2020-10-14 23:49:09,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 23:49:09,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:09,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 23:49:09,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:49:09,225 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 51 states. [2020-10-14 23:49:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:12,158 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-10-14 23:49:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 23:49:12,158 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-14 23:49:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:12,160 INFO L225 Difference]: With dead ends: 123 [2020-10-14 23:49:12,160 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 23:49:12,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:49:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 23:49:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-14 23:49:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 23:49:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-10-14 23:49:12,165 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2020-10-14 23:49:12,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:12,165 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-10-14 23:49:12,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 23:49:12,165 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-10-14 23:49:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 23:49:12,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:12,166 INFO L422 BasicCegarLoop]: trace histogram [51, 49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:12,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:49:12,166 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1605152795, now seen corresponding path program 50 times [2020-10-14 23:49:12,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:12,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408433381] [2020-10-14 23:49:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:12,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:12,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:15,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:15,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 23:49:15,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:49:15,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3798 [2020-10-14 23:49:15,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:15,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:15,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 23:49:15,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:15,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 23:49:15,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:17,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:17,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:17,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:17,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:17,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:17,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:17,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:17,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:17,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:17,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:17,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:17,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 2450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:49:17,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408433381] [2020-10-14 23:49:17,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:17,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 23:49:17,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651678745] [2020-10-14 23:49:17,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 23:49:17,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:17,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 23:49:17,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:49:17,843 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 52 states. [2020-10-14 23:49:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:21,007 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-10-14 23:49:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 23:49:21,008 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-14 23:49:21,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:21,008 INFO L225 Difference]: With dead ends: 125 [2020-10-14 23:49:21,009 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 23:49:21,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:49:21,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 23:49:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-14 23:49:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 23:49:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-10-14 23:49:21,015 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2020-10-14 23:49:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:21,015 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-10-14 23:49:21,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 23:49:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-10-14 23:49:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 23:49:21,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:21,016 INFO L422 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:21,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:49:21,017 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:21,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:21,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2110773224, now seen corresponding path program 51 times [2020-10-14 23:49:21,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:21,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417318944] [2020-10-14 23:49:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:21,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:22,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:25,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:25,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 23:49:25,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:49:25,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4015 [2020-10-14 23:49:25,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:25,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:25,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 23:49:25,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:25,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-14 23:49:25,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:26,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:26,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:26,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:26,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:26,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:26,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:26,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:26,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:26,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:26,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:26,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:26,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 153 proven. 2550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:49:26,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417318944] [2020-10-14 23:49:26,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:26,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 23:49:26,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835241547] [2020-10-14 23:49:26,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 23:49:26,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:26,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 23:49:26,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 23:49:26,935 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2020-10-14 23:49:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:30,193 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-10-14 23:49:30,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 23:49:30,194 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-14 23:49:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:30,195 INFO L225 Difference]: With dead ends: 127 [2020-10-14 23:49:30,195 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 23:49:30,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 23:49:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 23:49:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-14 23:49:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 23:49:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-10-14 23:49:30,200 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2020-10-14 23:49:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:30,201 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-10-14 23:49:30,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 23:49:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-10-14 23:49:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 23:49:30,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:30,202 INFO L422 BasicCegarLoop]: trace histogram [53, 51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:30,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:49:30,202 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:30,203 INFO L82 PathProgramCache]: Analyzing trace with hash 297112789, now seen corresponding path program 52 times [2020-10-14 23:49:30,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:30,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32683686] [2020-10-14 23:49:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:30,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:32,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:34,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:34,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 23:49:34,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:49:34,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3938 [2020-10-14 23:49:34,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:34,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:34,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 23:49:34,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:34,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-14 23:49:34,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:36,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:36,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:36,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:36,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:36,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:36,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:36,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:36,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:36,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:49:36,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32683686] [2020-10-14 23:49:36,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:36,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 23:49:36,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197111125] [2020-10-14 23:49:36,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 23:49:36,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 23:49:36,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 23:49:36,156 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 54 states. [2020-10-14 23:49:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:39,483 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-10-14 23:49:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 23:49:39,487 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-14 23:49:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:39,488 INFO L225 Difference]: With dead ends: 129 [2020-10-14 23:49:39,488 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 23:49:39,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 23:49:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 23:49:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-14 23:49:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 23:49:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-14 23:49:39,494 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2020-10-14 23:49:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:39,495 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-14 23:49:39,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 23:49:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-14 23:49:39,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 23:49:39,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:39,496 INFO L422 BasicCegarLoop]: trace histogram [54, 52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:39,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:49:39,496 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:39,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:39,496 INFO L82 PathProgramCache]: Analyzing trace with hash -711801262, now seen corresponding path program 53 times [2020-10-14 23:49:39,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:39,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441090807] [2020-10-14 23:49:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:39,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:41,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:44,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:44,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 23:49:44,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:49:44,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 23:49:44,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:44,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:44,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 23:49:44,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:44,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-14 23:49:44,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:46,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:46,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:46,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:46,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:46,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:49:46,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:46,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:46,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 2756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:49:46,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441090807] [2020-10-14 23:49:46,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:46,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 23:49:46,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886197513] [2020-10-14 23:49:46,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 23:49:46,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:46,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 23:49:46,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 23:49:46,673 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 55 states. [2020-10-14 23:49:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:50,325 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2020-10-14 23:49:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 23:49:50,326 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-14 23:49:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:50,327 INFO L225 Difference]: With dead ends: 131 [2020-10-14 23:49:50,328 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 23:49:50,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 23:49:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 23:49:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-14 23:49:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 23:49:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2020-10-14 23:49:50,335 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2020-10-14 23:49:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:50,336 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2020-10-14 23:49:50,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 23:49:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2020-10-14 23:49:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 23:49:50,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:50,337 INFO L422 BasicCegarLoop]: trace histogram [55, 53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:50,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 23:49:50,337 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:50,338 INFO L82 PathProgramCache]: Analyzing trace with hash 384404623, now seen corresponding path program 54 times [2020-10-14 23:49:50,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:50,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427041205] [2020-10-14 23:49:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:50,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:50,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:53,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:53,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 23:49:53,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:49:53,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3610 [2020-10-14 23:49:53,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:53,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 23:49:53,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:53,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-14 23:49:53,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:56,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:56,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:56,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:56,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:56,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:56,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:56,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:56,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:56,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:56,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:56,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:56,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:49:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 162 proven. 2862 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:49:56,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427041205] [2020-10-14 23:49:56,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:56,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 23:49:56,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847168432] [2020-10-14 23:49:56,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 23:49:56,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:56,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 23:49:56,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 23:49:56,170 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 56 states. [2020-10-14 23:49:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:59,911 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-10-14 23:49:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 23:49:59,912 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-14 23:49:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:59,913 INFO L225 Difference]: With dead ends: 133 [2020-10-14 23:49:59,913 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 23:49:59,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 23:49:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 23:49:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-14 23:49:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 23:49:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-10-14 23:49:59,921 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2020-10-14 23:49:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:59,921 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-10-14 23:49:59,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 23:49:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-10-14 23:49:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 23:49:59,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:59,922 INFO L422 BasicCegarLoop]: trace histogram [56, 54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:59,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 23:49:59,922 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:59,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:59,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1571272588, now seen corresponding path program 55 times [2020-10-14 23:49:59,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:59,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322250637] [2020-10-14 23:49:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:59,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:02,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:04,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:04,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 23:50:04,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:50:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-14 23:50:04,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:04,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:04,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 23:50:04,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:50:04,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-14 23:50:04,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:07,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:50:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:07,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:07,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:07,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:50:07,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:50:07,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:50:07,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:07,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:07,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:50:07,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:50:07,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:50:07,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:50:07,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322250637] [2020-10-14 23:50:07,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:50:07,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 23:50:07,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265856238] [2020-10-14 23:50:07,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 23:50:07,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:50:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 23:50:07,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 23:50:07,220 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 57 states. [2020-10-14 23:50:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:50:11,175 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2020-10-14 23:50:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 23:50:11,175 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-14 23:50:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:50:11,177 INFO L225 Difference]: With dead ends: 135 [2020-10-14 23:50:11,177 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 23:50:11,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 23:50:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 23:50:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-14 23:50:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 23:50:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-10-14 23:50:11,184 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2020-10-14 23:50:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:50:11,185 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-10-14 23:50:11,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 23:50:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-10-14 23:50:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 23:50:11,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:50:11,186 INFO L422 BasicCegarLoop]: trace histogram [57, 55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:50:11,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 23:50:11,186 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:50:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:50:11,187 INFO L82 PathProgramCache]: Analyzing trace with hash -309913783, now seen corresponding path program 56 times [2020-10-14 23:50:11,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:50:11,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81651419] [2020-10-14 23:50:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:50:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:11,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:13,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:16,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:16,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 23:50:16,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:50:16,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:50:16,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:16,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 23:50:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:50:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-14 23:50:16,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:18,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:50:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:18,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:18,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:18,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:50:18,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:50:18,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:50:18,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:18,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:50:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:50:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:50:18,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 3080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:50:18,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81651419] [2020-10-14 23:50:18,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:50:18,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 23:50:18,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426172543] [2020-10-14 23:50:18,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 23:50:18,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:50:18,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 23:50:18,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:50:18,563 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 58 states. [2020-10-14 23:50:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:50:22,731 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2020-10-14 23:50:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 23:50:22,731 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-14 23:50:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:50:22,733 INFO L225 Difference]: With dead ends: 137 [2020-10-14 23:50:22,733 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 23:50:22,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:50:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 23:50:22,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-14 23:50:22,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 23:50:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-10-14 23:50:22,741 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2020-10-14 23:50:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:50:22,741 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-10-14 23:50:22,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 23:50:22,742 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-10-14 23:50:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 23:50:22,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:50:22,742 INFO L422 BasicCegarLoop]: trace histogram [58, 56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:50:22,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 23:50:22,743 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:50:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:50:22,743 INFO L82 PathProgramCache]: Analyzing trace with hash 51215302, now seen corresponding path program 57 times [2020-10-14 23:50:22,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:50:22,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288230072] [2020-10-14 23:50:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:50:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:22,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:27,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:27,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 23:50:27,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:50:27,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 23:50:27,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:27,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 23:50:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:50:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-14 23:50:27,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:30,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:50:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:30,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:30,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:30,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:50:30,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:50:30,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:50:30,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:30,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:30,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:50:30,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:50:30,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:50:30,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 171 proven. 3192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:50:30,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288230072] [2020-10-14 23:50:30,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:50:30,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 23:50:30,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057761693] [2020-10-14 23:50:30,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 23:50:30,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:50:30,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 23:50:30,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 23:50:30,209 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 59 states. [2020-10-14 23:50:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:50:34,398 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2020-10-14 23:50:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 23:50:34,399 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 126 [2020-10-14 23:50:34,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:50:34,400 INFO L225 Difference]: With dead ends: 139 [2020-10-14 23:50:34,401 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 23:50:34,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 23:50:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 23:50:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-10-14 23:50:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 23:50:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-10-14 23:50:34,407 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2020-10-14 23:50:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:50:34,408 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-10-14 23:50:34,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 23:50:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-10-14 23:50:34,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 23:50:34,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:50:34,409 INFO L422 BasicCegarLoop]: trace histogram [59, 57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:50:34,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 23:50:34,409 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:50:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:50:34,410 INFO L82 PathProgramCache]: Analyzing trace with hash -796084989, now seen corresponding path program 58 times [2020-10-14 23:50:34,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:50:34,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973691486] [2020-10-14 23:50:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:50:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:34,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:34,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:39,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:39,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 23:50:39,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:50:39,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 23:50:39,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:39,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:39,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-14 23:50:39,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:50:39,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-14 23:50:39,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:41,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:50:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:41,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:41,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:41,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:50:41,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:50:41,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:50:41,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:41,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:50:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:50:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:50:41,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:50:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 174 proven. 3306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:50:41,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973691486] [2020-10-14 23:50:41,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:50:41,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 23:50:41,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350494711] [2020-10-14 23:50:41,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 23:50:41,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:50:41,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 23:50:41,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 23:50:41,956 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 60 states.