/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/array-crafted/zero_sum_const3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:40:05,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:40:05,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:40:05,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:40:05,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:40:05,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:40:05,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:40:05,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:40:05,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:40:05,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:40:05,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:40:05,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:40:05,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:40:05,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:40:05,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:40:05,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:40:05,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:40:05,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:40:05,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:40:05,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:40:05,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:40:05,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:40:05,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:40:05,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:40:05,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:40:05,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:40:05,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:40:05,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:40:05,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:40:05,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:40:05,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:40:05,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:40:05,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:40:05,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:40:05,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:40:05,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:40:05,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:40:05,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:40:05,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:40:05,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:40:05,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:40:05,365 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 17:40:05,387 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:40:05,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:40:05,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:40:05,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:40:05,389 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:40:05,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:40:05,389 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:40:05,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:40:05,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:40:05,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:40:05,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:40:05,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:40:05,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:40:05,390 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:40:05,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:40:05,391 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:40:05,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:40:05,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:40:05,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:40:05,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:40:05,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:40:05,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:40:05,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:40:05,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:40:05,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:40:05,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:40:05,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:40:05,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:40:05,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:40:05,393 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 17:40:05,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:40:05,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:40:05,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:40:05,738 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:40:05,738 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:40:05,739 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2020-10-14 17:40:05,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c61dd02f/7bb14e171d8543efbf78e599d5c85cb2/FLAG4292a6989 [2020-10-14 17:40:06,261 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:40:06,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2020-10-14 17:40:06,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c61dd02f/7bb14e171d8543efbf78e599d5c85cb2/FLAG4292a6989 [2020-10-14 17:40:06,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c61dd02f/7bb14e171d8543efbf78e599d5c85cb2 [2020-10-14 17:40:06,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:40:06,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:40:06,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:40:06,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:40:06,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:40:06,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:40:06" (1/1) ... [2020-10-14 17:40:06,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b9c96c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06, skipping insertion in model container [2020-10-14 17:40:06,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:40:06" (1/1) ... [2020-10-14 17:40:06,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:40:06,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:40:06,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:40:06,893 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:40:06,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:40:06,948 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:40:06,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06 WrapperNode [2020-10-14 17:40:06,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:40:06,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:40:06,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:40:06,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:40:07,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06" (1/1) ... [2020-10-14 17:40:07,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06" (1/1) ... [2020-10-14 17:40:07,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06" (1/1) ... [2020-10-14 17:40:07,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06" (1/1) ... [2020-10-14 17:40:07,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06" (1/1) ... [2020-10-14 17:40:07,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06" (1/1) ... [2020-10-14 17:40:07,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06" (1/1) ... [2020-10-14 17:40:07,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:40:07,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:40:07,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:40:07,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:40:07,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06" (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 17:40:07,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:40:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:40:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 17:40:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:40:07,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:40:07,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:40:07,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 17:40:07,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 17:40:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:40:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-14 17:40:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 17:40:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:40:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 17:40:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:40:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:40:07,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:40:07,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:40:07,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:40:07,413 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:40:07,414 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-14 17:40:07,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:40:07 BoogieIcfgContainer [2020-10-14 17:40:07,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:40:07,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:40:07,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:40:07,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:40:07,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:40:06" (1/3) ... [2020-10-14 17:40:07,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b69baf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:40:07, skipping insertion in model container [2020-10-14 17:40:07,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:40:06" (2/3) ... [2020-10-14 17:40:07,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b69baf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:40:07, skipping insertion in model container [2020-10-14 17:40:07,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:40:07" (3/3) ... [2020-10-14 17:40:07,426 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2020-10-14 17:40:07,437 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:40:07,444 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:40:07,461 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:40:07,513 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:40:07,513 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:40:07,514 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:40:07,514 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:40:07,514 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:40:07,514 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:40:07,514 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:40:07,514 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:40:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-14 17:40:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 17:40:07,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:07,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:07,549 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:07,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1057208235, now seen corresponding path program 1 times [2020-10-14 17:40:07,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:07,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975290867] [2020-10-14 17:40:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:07,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:07,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:07,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:07,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:07,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:07,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:08,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:08,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:08,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:08,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 17:40:08,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:40:08,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-14 17:40:08,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:08,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:40:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 17:40:08,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:40:08,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:08,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:08,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:08,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:08,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:08,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:08,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:08,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:08,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:08,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:08,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:08,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:08,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975290867] [2020-10-14 17:40:08,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:40:08,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 17:40:08,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803747713] [2020-10-14 17:40:08,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:40:08,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:08,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:40:08,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:40:08,757 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-10-14 17:40:08,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:08,979 INFO L93 Difference]: Finished difference Result 88 states and 130 transitions. [2020-10-14 17:40:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:40:08,981 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-14 17:40:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:08,994 INFO L225 Difference]: With dead ends: 88 [2020-10-14 17:40:08,994 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 17:40:08,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:40:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 17:40:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 17:40:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 17:40:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-14 17:40:09,052 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 24 [2020-10-14 17:40:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:09,052 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-14 17:40:09,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:40:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-14 17:40:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 17:40:09,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:09,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:09,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:40:09,055 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash -817797343, now seen corresponding path program 1 times [2020-10-14 17:40:09,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:09,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197824433] [2020-10-14 17:40:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:09,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:09,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:09,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:09,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:09,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:09,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:09,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:10,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:10,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:10,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:10,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:10,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:14,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:14,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:40:14,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:40:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:40:14,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:14,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:40:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:40:14,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:14,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:14,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:14,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:14,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:14,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:14,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:14,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:14,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:14,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:14,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:14,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:14,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:40:14,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197824433] [2020-10-14 17:40:14,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:40:14,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 17:40:14,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615234421] [2020-10-14 17:40:14,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:40:14,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:40:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:40:14,125 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 5 states. [2020-10-14 17:40:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:14,266 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2020-10-14 17:40:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:40:14,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-14 17:40:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:14,268 INFO L225 Difference]: With dead ends: 80 [2020-10-14 17:40:14,269 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 17:40:14,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:40:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 17:40:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-14 17:40:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 17:40:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-14 17:40:14,278 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 26 [2020-10-14 17:40:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:14,279 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-14 17:40:14,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:40:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-14 17:40:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 17:40:14,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:14,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:14,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:40:14,281 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:14,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1760122197, now seen corresponding path program 1 times [2020-10-14 17:40:14,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:14,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093579175] [2020-10-14 17:40:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:14,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:14,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:14,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:14,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:14,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:17,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:19,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:19,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 17:40:19,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:40:19,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:40:19,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:19,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:40:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:40:19,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:19,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:19,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:19,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:19,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:19,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:19,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:40:19,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:19,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:19,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:19,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:19,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:19,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 17:40:19,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093579175] [2020-10-14 17:40:19,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:19,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:40:19,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420072640] [2020-10-14 17:40:19,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:40:19,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:19,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:40:19,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:40:19,369 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 6 states. [2020-10-14 17:40:19,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:19,622 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-10-14 17:40:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:40:19,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-14 17:40:19,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:19,624 INFO L225 Difference]: With dead ends: 82 [2020-10-14 17:40:19,624 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 17:40:19,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:40:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 17:40:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 17:40:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 17:40:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-14 17:40:19,643 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2020-10-14 17:40:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:19,645 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-14 17:40:19,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:40:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-14 17:40:19,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 17:40:19,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:19,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:19,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:40:19,648 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:19,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1896329191, now seen corresponding path program 2 times [2020-10-14 17:40:19,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:19,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104535733] [2020-10-14 17:40:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:19,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:20,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:20,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:21,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:22,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:23,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:24,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:24,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:24,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 17:40:24,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:40:24,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 17:40:24,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:24,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:24,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:40:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 17:40:24,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:25,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:25,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:25,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:25,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:25,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:25,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:40:25,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:25,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:25,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 17:40:25,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104535733] [2020-10-14 17:40:25,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:25,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:40:25,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318859876] [2020-10-14 17:40:25,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:40:25,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:25,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:40:25,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:40:25,566 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 19 states. [2020-10-14 17:40:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:26,302 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-10-14 17:40:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:40:26,303 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-14 17:40:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:26,304 INFO L225 Difference]: With dead ends: 90 [2020-10-14 17:40:26,305 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 17:40:26,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:40:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 17:40:26,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-14 17:40:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 17:40:26,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-14 17:40:26,317 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2020-10-14 17:40:26,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:26,317 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-14 17:40:26,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:40:26,318 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-14 17:40:26,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 17:40:26,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:26,320 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:26,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:40:26,320 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash 26946245, now seen corresponding path program 3 times [2020-10-14 17:40:26,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:26,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512140642] [2020-10-14 17:40:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:26,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:26,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:26,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:26,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:26,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:31,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:31,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 17:40:31,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:40:31,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:40:31,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:31,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:31,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:40:31,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 17:40:31,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:40:31,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:31,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:31,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:31,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:31,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:31,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:31,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:31,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:31,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:31,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 17:40:31,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512140642] [2020-10-14 17:40:31,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:31,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:40:31,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771615236] [2020-10-14 17:40:31,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:40:31,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:31,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:40:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:40:31,444 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 10 states. [2020-10-14 17:40:32,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:32,018 INFO L93 Difference]: Finished difference Result 161 states and 187 transitions. [2020-10-14 17:40:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:40:32,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-14 17:40:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:32,021 INFO L225 Difference]: With dead ends: 161 [2020-10-14 17:40:32,021 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 17:40:32,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:40:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 17:40:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-14 17:40:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 17:40:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-10-14 17:40:32,044 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 54 [2020-10-14 17:40:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:32,045 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-10-14 17:40:32,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:40:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-10-14 17:40:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 17:40:32,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:32,050 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:32,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:40:32,050 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:32,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1975408251, now seen corresponding path program 4 times [2020-10-14 17:40:32,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:32,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539991382] [2020-10-14 17:40:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:32,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:32,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:32,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:32,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:37,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:37,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 17:40:37,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:40:37,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:40:37,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:37,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:37,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:40:37,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 17:40:37,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:40:37,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:37,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:37,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:37,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:37,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:37,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:37,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:37,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:37,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 17:40:37,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539991382] [2020-10-14 17:40:37,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:37,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:40:37,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561104413] [2020-10-14 17:40:37,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:40:37,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:37,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:40:37,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:40:37,177 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 10 states. [2020-10-14 17:40:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:37,568 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2020-10-14 17:40:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:40:37,568 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-14 17:40:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:37,569 INFO L225 Difference]: With dead ends: 157 [2020-10-14 17:40:37,570 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 17:40:37,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:40:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 17:40:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-10-14 17:40:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 17:40:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-14 17:40:37,586 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 54 [2020-10-14 17:40:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:37,590 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-14 17:40:37,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:40:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-14 17:40:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 17:40:37,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:37,593 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:37,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:40:37,593 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:37,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1675076345, now seen corresponding path program 5 times [2020-10-14 17:40:37,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:37,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651594830] [2020-10-14 17:40:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:37,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:38,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:39,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:40,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:40,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:41,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:42,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:42,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:42,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 17:40:42,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:40:42,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-14 17:40:42,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:42,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:42,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 17:40:42,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:42,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 17:40:42,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:44,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:44,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:44,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:44,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:44,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:44,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:44,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:44,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:44,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:44,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:44,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:44,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 17:40:44,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651594830] [2020-10-14 17:40:44,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:44,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:40:44,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805923183] [2020-10-14 17:40:44,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:40:44,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:44,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:40:44,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:40:44,610 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 35 states. [2020-10-14 17:40:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:47,580 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2020-10-14 17:40:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:40:47,580 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2020-10-14 17:40:47,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:47,582 INFO L225 Difference]: With dead ends: 120 [2020-10-14 17:40:47,582 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 17:40:47,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 17:40:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 17:40:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-14 17:40:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 17:40:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2020-10-14 17:40:47,596 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 66 [2020-10-14 17:40:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:47,596 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2020-10-14 17:40:47,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:40:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2020-10-14 17:40:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 17:40:47,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:47,598 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:47,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:40:47,598 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:47,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:47,598 INFO L82 PathProgramCache]: Analyzing trace with hash -739200681, now seen corresponding path program 6 times [2020-10-14 17:40:47,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:47,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707200415] [2020-10-14 17:40:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:47,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:47,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:47,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:47,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:48,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:52,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:52,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 17:40:52,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:40:52,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:40:52,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:52,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:52,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:40:52,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 17:40:52,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:40:52,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:52,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:52,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:52,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:52,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:52,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:52,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:52,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:52,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:52,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:52,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:52,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:52,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 17:40:52,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707200415] [2020-10-14 17:40:52,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:52,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:40:52,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987872320] [2020-10-14 17:40:52,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:40:52,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:52,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:40:52,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:40:52,721 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 12 states. [2020-10-14 17:40:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:53,515 INFO L93 Difference]: Finished difference Result 203 states and 229 transitions. [2020-10-14 17:40:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:40:53,516 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-14 17:40:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:53,518 INFO L225 Difference]: With dead ends: 203 [2020-10-14 17:40:53,518 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 17:40:53,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:40:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 17:40:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2020-10-14 17:40:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 17:40:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2020-10-14 17:40:53,534 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 68 [2020-10-14 17:40:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:53,535 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2020-10-14 17:40:53,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:40:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2020-10-14 17:40:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 17:40:53,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:53,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:53,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:40:53,537 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash 148971543, now seen corresponding path program 7 times [2020-10-14 17:40:53,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:53,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815406440] [2020-10-14 17:40:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:53,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:53,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:53,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:53,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:53,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:58,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:58,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 17:40:58,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:40:58,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:40:58,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:58,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:58,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:40:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 17:40:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:40:58,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:58,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:58,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:58,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:58,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:58,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:58,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:58,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:58,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:58,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:58,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:58,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:58,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 17:40:58,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815406440] [2020-10-14 17:40:58,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:58,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:40:58,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143026401] [2020-10-14 17:40:58,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:40:58,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:58,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:40:58,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:40:58,650 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand 12 states. [2020-10-14 17:40:59,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:59,128 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2020-10-14 17:40:59,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:40:59,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-14 17:40:59,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:59,130 INFO L225 Difference]: With dead ends: 193 [2020-10-14 17:40:59,130 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 17:40:59,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:40:59,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 17:40:59,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2020-10-14 17:40:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 17:40:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-14 17:40:59,141 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 68 [2020-10-14 17:40:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:59,141 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-14 17:40:59,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:40:59,142 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-14 17:40:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 17:40:59,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:59,143 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:59,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:40:59,143 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:59,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1601457803, now seen corresponding path program 8 times [2020-10-14 17:40:59,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:59,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021740921] [2020-10-14 17:40:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:59,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:59,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:00,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:02,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:03,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:04,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:04,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 17:41:04,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:41:04,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 17:41:04,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:04,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 17:41:04,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:41:04,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 17:41:04,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:41:05,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:05,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:05,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:05,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:05,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:05,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:05,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:05,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:05,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:05,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:05,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:05,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:41:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 17:41:05,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021740921] [2020-10-14 17:41:05,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:05,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:41:05,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547423193] [2020-10-14 17:41:05,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:41:05,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:05,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:41:05,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:41:05,757 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 28 states. [2020-10-14 17:41:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:07,390 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2020-10-14 17:41:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:41:07,391 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-10-14 17:41:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:07,392 INFO L225 Difference]: With dead ends: 138 [2020-10-14 17:41:07,392 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 17:41:07,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 23 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:41:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 17:41:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2020-10-14 17:41:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 17:41:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2020-10-14 17:41:07,408 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 80 [2020-10-14 17:41:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:07,408 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2020-10-14 17:41:07,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:41:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2020-10-14 17:41:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 17:41:07,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:07,410 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:07,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:41:07,410 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:07,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:07,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2049101929, now seen corresponding path program 9 times [2020-10-14 17:41:07,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:07,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126708571] [2020-10-14 17:41:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:07,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:07,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:07,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:07,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:12,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:12,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 17:41:12,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:41:12,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:41:12,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:12,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:41:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 17:41:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:41:12,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:12,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:12,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:12,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:12,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:12,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:12,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:12,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:12,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:12,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:12,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:12,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:12,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:41:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-14 17:41:12,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126708571] [2020-10-14 17:41:12,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:12,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:41:12,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428348272] [2020-10-14 17:41:12,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:41:12,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:12,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:41:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:41:12,573 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand 14 states. [2020-10-14 17:41:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:13,792 INFO L93 Difference]: Finished difference Result 245 states and 271 transitions. [2020-10-14 17:41:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:41:13,793 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-14 17:41:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:13,795 INFO L225 Difference]: With dead ends: 245 [2020-10-14 17:41:13,795 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 17:41:13,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:41:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 17:41:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 136. [2020-10-14 17:41:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 17:41:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2020-10-14 17:41:13,810 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 82 [2020-10-14 17:41:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:13,810 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2020-10-14 17:41:13,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:41:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2020-10-14 17:41:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 17:41:13,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:13,811 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:13,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:41:13,812 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:13,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:13,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1878970583, now seen corresponding path program 10 times [2020-10-14 17:41:13,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:13,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678880538] [2020-10-14 17:41:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:13,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:13,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:13,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:13,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:14,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:18,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:18,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 17:41:18,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:41:18,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:41:18,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:18,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:18,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:41:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 17:41:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:41:18,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:41:18,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:18,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:18,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:18,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:18,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:18,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:41:18,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:18,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:18,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:18,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:18,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:18,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:41:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-14 17:41:18,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678880538] [2020-10-14 17:41:18,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:18,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:41:18,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884398823] [2020-10-14 17:41:18,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:41:18,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:18,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:41:18,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:41:18,971 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2020-10-14 17:41:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:19,574 INFO L93 Difference]: Finished difference Result 229 states and 246 transitions. [2020-10-14 17:41:19,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:41:19,574 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-14 17:41:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:19,575 INFO L225 Difference]: With dead ends: 229 [2020-10-14 17:41:19,576 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 17:41:19,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:41:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 17:41:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-10-14 17:41:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 17:41:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2020-10-14 17:41:19,590 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 82 [2020-10-14 17:41:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:19,590 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2020-10-14 17:41:19,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:41:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2020-10-14 17:41:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 17:41:19,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:19,592 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:19,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:41:19,592 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:19,592 INFO L82 PathProgramCache]: Analyzing trace with hash 939578013, now seen corresponding path program 11 times [2020-10-14 17:41:19,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:19,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308155110] [2020-10-14 17:41:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:20,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:22,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:23,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:24,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:24,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 17:41:24,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:41:24,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5210 [2020-10-14 17:41:24,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:24,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:24,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-14 17:41:24,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:41:24,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-14 17:41:24,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:31,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:31,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:31,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:31,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:31,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:31,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:31,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:31,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:31,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:31,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:31,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:31,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 12 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:41:31,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308155110] [2020-10-14 17:41:31,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:31,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-14 17:41:31,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507139009] [2020-10-14 17:41:31,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-14 17:41:31,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-14 17:41:31,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=4905, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 17:41:31,257 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand 73 states. [2020-10-14 17:41:34,415 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-14 17:41:34,741 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-14 17:41:35,087 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-14 17:41:35,357 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-10-14 17:41:36,071 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-10-14 17:41:36,345 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2020-10-14 17:41:37,558 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 46 [2020-10-14 17:41:38,374 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2020-10-14 17:41:41,400 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-10-14 17:41:41,955 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-14 17:41:42,276 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-14 17:41:42,559 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-14 17:41:42,904 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-14 17:41:50,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:50,446 INFO L93 Difference]: Finished difference Result 261 states and 291 transitions. [2020-10-14 17:41:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-14 17:41:50,447 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 94 [2020-10-14 17:41:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:50,451 INFO L225 Difference]: With dead ends: 261 [2020-10-14 17:41:50,451 INFO L226 Difference]: Without dead ends: 233 [2020-10-14 17:41:50,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3733 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=1339, Invalid=15953, Unknown=0, NotChecked=0, Total=17292 [2020-10-14 17:41:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-14 17:41:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 188. [2020-10-14 17:41:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-14 17:41:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2020-10-14 17:41:50,492 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 94 [2020-10-14 17:41:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:50,493 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2020-10-14 17:41:50,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-14 17:41:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2020-10-14 17:41:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 17:41:50,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:50,494 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:50,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:41:50,495 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2004678331, now seen corresponding path program 12 times [2020-10-14 17:41:50,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:50,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902677350] [2020-10-14 17:41:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:50,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:50,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:50,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:50,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:51,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:55,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:55,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 17:41:55,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:41:55,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:41:55,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:55,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:41:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 17:41:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 17:41:55,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:55,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:55,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:55,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:55,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:55,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:55,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:55,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:55,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:55,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:55,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:55,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-14 17:41:55,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902677350] [2020-10-14 17:41:55,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:55,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:41:55,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327082287] [2020-10-14 17:41:55,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:41:55,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:55,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:41:55,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:41:55,692 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand 16 states. [2020-10-14 17:41:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:56,609 INFO L93 Difference]: Finished difference Result 375 states and 406 transitions. [2020-10-14 17:41:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:41:56,610 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2020-10-14 17:41:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:56,612 INFO L225 Difference]: With dead ends: 375 [2020-10-14 17:41:56,612 INFO L226 Difference]: Without dead ends: 181 [2020-10-14 17:41:56,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:41:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-14 17:41:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2020-10-14 17:41:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 17:41:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 178 transitions. [2020-10-14 17:41:56,631 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 178 transitions. Word has length 96 [2020-10-14 17:41:56,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:56,631 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 178 transitions. [2020-10-14 17:41:56,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:41:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 178 transitions. [2020-10-14 17:41:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 17:41:56,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:56,633 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:56,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:41:56,633 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:56,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:56,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1669953595, now seen corresponding path program 13 times [2020-10-14 17:41:56,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:56,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015916173] [2020-10-14 17:41:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:56,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:56,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:56,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:56,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:01,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:01,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 17:42:01,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:42:01,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 17:42:01,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:01,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:01,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:42:01,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:42:01,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:42:01,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:01,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:01,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:01,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:01,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:01,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:01,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:01,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-14 17:42:01,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015916173] [2020-10-14 17:42:01,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:01,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:42:01,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991326226] [2020-10-14 17:42:01,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:42:01,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:01,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:42:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:42:01,845 INFO L87 Difference]: Start difference. First operand 167 states and 178 transitions. Second operand 16 states. [2020-10-14 17:42:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:02,864 INFO L93 Difference]: Finished difference Result 174 states and 185 transitions. [2020-10-14 17:42:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:42:02,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2020-10-14 17:42:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:02,866 INFO L225 Difference]: With dead ends: 174 [2020-10-14 17:42:02,866 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 17:42:02,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:42:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 17:42:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-14 17:42:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 17:42:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2020-10-14 17:42:02,878 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 96 [2020-10-14 17:42:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:02,879 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2020-10-14 17:42:02,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:42:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2020-10-14 17:42:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 17:42:02,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:02,880 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:02,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:42:02,880 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1235767087, now seen corresponding path program 14 times [2020-10-14 17:42:02,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:02,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957505032] [2020-10-14 17:42:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:03,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:04,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:07,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:08,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:08,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 17:42:08,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:42:08,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5821 [2020-10-14 17:42:08,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:08,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 85 [2020-10-14 17:42:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:42:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-14 17:42:08,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:19,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:19,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:19,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:19,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:19,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:19,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:19,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:19,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:19,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:19,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:19,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:19,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:42:19,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957505032] [2020-10-14 17:42:19,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:19,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-14 17:42:19,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565468456] [2020-10-14 17:42:19,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-14 17:42:19,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:19,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-14 17:42:19,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=5202, Unknown=0, NotChecked=0, Total=5700 [2020-10-14 17:42:19,485 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand 76 states. [2020-10-14 17:42:22,545 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-14 17:42:24,458 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-14 17:42:27,171 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-14 17:42:31,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:31,492 INFO L93 Difference]: Finished difference Result 229 states and 250 transitions. [2020-10-14 17:42:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-14 17:42:31,493 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 108 [2020-10-14 17:42:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:31,495 INFO L225 Difference]: With dead ends: 229 [2020-10-14 17:42:31,495 INFO L226 Difference]: Without dead ends: 223 [2020-10-14 17:42:31,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=900, Invalid=9606, Unknown=0, NotChecked=0, Total=10506 [2020-10-14 17:42:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-14 17:42:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 190. [2020-10-14 17:42:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-14 17:42:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 202 transitions. [2020-10-14 17:42:31,515 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 202 transitions. Word has length 108 [2020-10-14 17:42:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:31,516 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 202 transitions. [2020-10-14 17:42:31,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-14 17:42:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 202 transitions. [2020-10-14 17:42:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 17:42:31,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:31,517 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:31,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:42:31,517 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:31,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1133598733, now seen corresponding path program 15 times [2020-10-14 17:42:31,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:31,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345399615] [2020-10-14 17:42:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:31,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:31,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:31,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:36,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:36,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 17:42:36,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:42:36,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 17:42:36,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:36,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:42:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 17:42:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:42:36,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:36,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:36,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:36,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:36,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:36,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:36,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:36,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:36,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:36,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:36,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:36,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:36,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-14 17:42:36,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345399615] [2020-10-14 17:42:36,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:36,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:42:36,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703643072] [2020-10-14 17:42:36,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:42:36,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:36,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:42:36,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:42:36,789 INFO L87 Difference]: Start difference. First operand 190 states and 202 transitions. Second operand 18 states. [2020-10-14 17:42:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:38,857 INFO L93 Difference]: Finished difference Result 288 states and 310 transitions. [2020-10-14 17:42:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:42:38,858 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 110 [2020-10-14 17:42:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:38,859 INFO L225 Difference]: With dead ends: 288 [2020-10-14 17:42:38,860 INFO L226 Difference]: Without dead ends: 213 [2020-10-14 17:42:38,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:42:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-14 17:42:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 200. [2020-10-14 17:42:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-14 17:42:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 212 transitions. [2020-10-14 17:42:38,885 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 212 transitions. Word has length 110 [2020-10-14 17:42:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:38,886 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 212 transitions. [2020-10-14 17:42:38,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:42:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 212 transitions. [2020-10-14 17:42:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 17:42:38,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:38,887 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:38,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:42:38,887 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:38,888 INFO L82 PathProgramCache]: Analyzing trace with hash 780009259, now seen corresponding path program 16 times [2020-10-14 17:42:38,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:38,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134318862] [2020-10-14 17:42:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:38,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:38,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:39,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:40,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:43,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:43,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 17:42:43,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:42:43,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:42:43,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:43,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:43,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:42:43,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:42:43,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 17:42:43,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:44,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:44,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:44,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:44,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:44,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:44,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:44,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:44,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:44,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:44,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:44,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:44,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2020-10-14 17:42:44,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134318862] [2020-10-14 17:42:44,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:44,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:42:44,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190610578] [2020-10-14 17:42:44,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:42:44,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:44,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:42:44,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:42:44,173 INFO L87 Difference]: Start difference. First operand 200 states and 212 transitions. Second operand 18 states. [2020-10-14 17:42:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:45,239 INFO L93 Difference]: Finished difference Result 301 states and 318 transitions. [2020-10-14 17:42:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:42:45,241 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2020-10-14 17:42:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:45,242 INFO L225 Difference]: With dead ends: 301 [2020-10-14 17:42:45,242 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 17:42:45,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:42:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 17:42:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2020-10-14 17:42:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 17:42:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2020-10-14 17:42:45,257 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 112 [2020-10-14 17:42:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:45,257 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2020-10-14 17:42:45,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:42:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2020-10-14 17:42:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 17:42:45,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:45,259 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:45,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:42:45,259 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:45,260 INFO L82 PathProgramCache]: Analyzing trace with hash -895622079, now seen corresponding path program 17 times [2020-10-14 17:42:45,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:45,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108699807] [2020-10-14 17:42:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:45,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:47,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:50,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:50,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 17:42:50,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:42:50,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:42:50,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:50,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:50,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-14 17:42:50,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:42:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-14 17:42:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:56,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:56,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:56,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:56,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:56,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:42:56,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:56,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:56,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:56,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:56,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:56,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 17:42:56,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108699807] [2020-10-14 17:42:56,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:56,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 17:42:56,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116086224] [2020-10-14 17:42:56,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 17:42:56,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:56,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 17:42:56,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1965, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 17:42:56,408 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand 46 states. [2020-10-14 17:43:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:02,163 INFO L93 Difference]: Finished difference Result 210 states and 221 transitions. [2020-10-14 17:43:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:43:02,164 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 122 [2020-10-14 17:43:02,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:02,166 INFO L225 Difference]: With dead ends: 210 [2020-10-14 17:43:02,166 INFO L226 Difference]: Without dead ends: 205 [2020-10-14 17:43:02,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 40 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 17:43:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-14 17:43:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2020-10-14 17:43:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-14 17:43:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 203 transitions. [2020-10-14 17:43:02,189 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 203 transitions. Word has length 122 [2020-10-14 17:43:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:02,189 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 203 transitions. [2020-10-14 17:43:02,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 17:43:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 203 transitions. [2020-10-14 17:43:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 17:43:02,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:02,193 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:43:02,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:43:02,193 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:02,194 INFO L82 PathProgramCache]: Analyzing trace with hash 949747871, now seen corresponding path program 18 times [2020-10-14 17:43:02,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:02,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590023858] [2020-10-14 17:43:02,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:02,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:02,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:02,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:02,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:07,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:07,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 17:43:07,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:43:07,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 17:43:07,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:07,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:07,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:43:07,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 17:43:07,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:43:07,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:07,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:07,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:07,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:07,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:07,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:07,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:43:07,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:07,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:07,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:07,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:07,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:07,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-14 17:43:07,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590023858] [2020-10-14 17:43:07,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:43:07,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:43:07,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675943896] [2020-10-14 17:43:07,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:43:07,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:07,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:43:07,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:43:07,555 INFO L87 Difference]: Start difference. First operand 192 states and 203 transitions. Second operand 20 states. [2020-10-14 17:43:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:10,176 INFO L93 Difference]: Finished difference Result 371 states and 397 transitions. [2020-10-14 17:43:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:43:10,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 124 [2020-10-14 17:43:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:10,179 INFO L225 Difference]: With dead ends: 371 [2020-10-14 17:43:10,179 INFO L226 Difference]: Without dead ends: 233 [2020-10-14 17:43:10,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=1083, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:43:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-14 17:43:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 202. [2020-10-14 17:43:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-14 17:43:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 213 transitions. [2020-10-14 17:43:10,204 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 213 transitions. Word has length 124 [2020-10-14 17:43:10,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:10,204 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 213 transitions. [2020-10-14 17:43:10,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:43:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 213 transitions. [2020-10-14 17:43:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 17:43:10,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:10,206 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:43:10,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:43:10,206 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:10,206 INFO L82 PathProgramCache]: Analyzing trace with hash -686018721, now seen corresponding path program 19 times [2020-10-14 17:43:10,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:10,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191149163] [2020-10-14 17:43:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:10,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:10,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:10,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:10,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:13,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:15,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:15,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 17:43:15,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:43:15,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:43:15,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:15,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:43:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 17:43:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 17:43:15,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:15,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:15,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:15,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:15,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:15,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:43:15,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:15,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:15,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:15,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:15,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:15,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-14 17:43:15,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191149163] [2020-10-14 17:43:15,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:43:15,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:43:15,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593816602] [2020-10-14 17:43:15,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:43:15,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:15,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:43:15,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:43:15,544 INFO L87 Difference]: Start difference. First operand 202 states and 213 transitions. Second operand 20 states. [2020-10-14 17:43:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:16,910 INFO L93 Difference]: Finished difference Result 337 states and 354 transitions. [2020-10-14 17:43:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:43:16,912 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 124 [2020-10-14 17:43:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:16,913 INFO L225 Difference]: With dead ends: 337 [2020-10-14 17:43:16,914 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 17:43:16,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:43:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 17:43:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2020-10-14 17:43:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 17:43:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2020-10-14 17:43:16,932 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 124 [2020-10-14 17:43:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:16,932 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2020-10-14 17:43:16,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:43:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2020-10-14 17:43:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 17:43:16,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:16,934 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:43:16,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:43:16,935 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1659063853, now seen corresponding path program 20 times [2020-10-14 17:43:16,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:16,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936685506] [2020-10-14 17:43:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:17,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:22,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:22,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 17:43:22,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:22,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 17:43:22,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:22,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 100 [2020-10-14 17:43:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:43:22,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-14 17:43:22,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:31,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:31,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:31,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:31,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:31,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:43:31,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:31,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:31,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 17:43:31,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936685506] [2020-10-14 17:43:31,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:43:31,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 17:43:31,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380670311] [2020-10-14 17:43:31,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 17:43:31,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:31,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 17:43:31,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=3164, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 17:43:31,881 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand 58 states. [2020-10-14 17:43:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:42,036 INFO L93 Difference]: Finished difference Result 234 states and 245 transitions. [2020-10-14 17:43:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:43:42,042 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 136 [2020-10-14 17:43:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:42,043 INFO L225 Difference]: With dead ends: 234 [2020-10-14 17:43:42,043 INFO L226 Difference]: Without dead ends: 229 [2020-10-14 17:43:42,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 9 SyntacticMatches, 38 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=152, Invalid=3388, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 17:43:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-14 17:43:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 214. [2020-10-14 17:43:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 17:43:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 225 transitions. [2020-10-14 17:43:42,065 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 225 transitions. Word has length 136 [2020-10-14 17:43:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:42,065 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 225 transitions. [2020-10-14 17:43:42,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 17:43:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 225 transitions. [2020-10-14 17:43:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 17:43:42,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:42,067 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:43:42,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:43:42,067 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:42,068 INFO L82 PathProgramCache]: Analyzing trace with hash -920665679, now seen corresponding path program 21 times [2020-10-14 17:43:42,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:42,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270392331] [2020-10-14 17:43:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:42,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:42,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:42,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:42,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:47,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:47,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 17:43:47,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:43:47,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:43:47,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:47,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:43:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 17:43:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 17:43:47,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:47,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:47,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:47,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:47,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:47,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:47,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:43:47,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:47,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:47,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:47,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:47,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:47,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-10-14 17:43:47,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270392331] [2020-10-14 17:43:47,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:43:47,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:43:47,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613554521] [2020-10-14 17:43:47,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:43:47,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:47,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:43:47,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:43:47,531 INFO L87 Difference]: Start difference. First operand 214 states and 225 transitions. Second operand 22 states. [2020-10-14 17:43:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:50,742 INFO L93 Difference]: Finished difference Result 413 states and 439 transitions. [2020-10-14 17:43:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:43:50,744 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 138 [2020-10-14 17:43:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:50,745 INFO L225 Difference]: With dead ends: 413 [2020-10-14 17:43:50,745 INFO L226 Difference]: Without dead ends: 259 [2020-10-14 17:43:50,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=393, Invalid=1329, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:43:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-14 17:43:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 224. [2020-10-14 17:43:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-14 17:43:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 235 transitions. [2020-10-14 17:43:50,768 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 235 transitions. Word has length 138 [2020-10-14 17:43:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:50,768 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 235 transitions. [2020-10-14 17:43:50,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:43:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 235 transitions. [2020-10-14 17:43:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 17:43:50,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:50,770 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:43:50,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:43:50,770 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:50,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:50,771 INFO L82 PathProgramCache]: Analyzing trace with hash 85844081, now seen corresponding path program 22 times [2020-10-14 17:43:50,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:50,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439893960] [2020-10-14 17:43:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:50,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:55,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:55,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 17:43:55,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:43:55,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:43:55,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:55,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:43:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 17:43:55,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 17:43:55,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:43:56,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:56,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:56,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:56,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:56,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:43:56,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:56,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:56,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-10-14 17:43:56,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439893960] [2020-10-14 17:43:56,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:43:56,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:43:56,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186636646] [2020-10-14 17:43:56,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:43:56,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:56,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:43:56,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:43:56,213 INFO L87 Difference]: Start difference. First operand 224 states and 235 transitions. Second operand 22 states.