/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 SingleStatement --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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:24:08,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:24:08,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:24:08,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:24:08,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:24:08,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:24:08,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:24:08,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:24:08,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:24:08,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:24:08,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:24:08,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:24:08,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:24:08,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:24:08,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:24:08,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:24:08,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:24:08,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:24:08,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:24:08,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:24:08,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:24:08,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:24:08,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:24:08,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:24:08,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:24:08,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:24:08,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:24:08,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:24:08,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:24:08,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:24:08,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:24:08,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:24:08,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:24:08,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:24:08,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:24:08,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:24:08,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:24:08,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:24:08,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:24:08,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:24:08,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:24:08,590 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 [2020-09-25 11:24:08,640 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:24:08,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:24:08,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:24:08,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:24:08,644 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:24:08,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:24:08,644 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:24:08,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:24:08,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:24:08,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:24:08,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:24:08,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:24:08,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:24:08,647 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:24:08,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:24:08,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:24:08,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:24:08,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:24:08,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:24:08,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:24:08,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:24:08,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:24:08,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:24:08,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:24:08,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:24:08,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:24:08,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:24:08,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:24:08,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:24:08,652 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 -> SingleStatement 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; 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; 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; 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; 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; 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; [2020-09-25 11:24:09,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:24:09,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:24:09,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:24:09,231 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:24:09,232 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:24:09,233 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-25 11:24:09,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44a2408c8/d7c37dfa99ee4048b9be8ee960848c5f/FLAG618e98863 [2020-09-25 11:24:09,874 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:24:09,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-25 11:24:09,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44a2408c8/d7c37dfa99ee4048b9be8ee960848c5f/FLAG618e98863 [2020-09-25 11:24:10,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44a2408c8/d7c37dfa99ee4048b9be8ee960848c5f [2020-09-25 11:24:10,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:24:10,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:24:10,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:24:10,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:24:10,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:24:10,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:24:10" (1/1) ... [2020-09-25 11:24:10,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a73c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10, skipping insertion in model container [2020-09-25 11:24:10,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:24:10" (1/1) ... [2020-09-25 11:24:10,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:24:10,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:24:10,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:24:10,559 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:24:10,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:24:10,602 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:24:10,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10 WrapperNode [2020-09-25 11:24:10,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:24:10,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:24:10,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:24:10,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:24:10,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10" (1/1) ... [2020-09-25 11:24:10,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10" (1/1) ... [2020-09-25 11:24:10,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10" (1/1) ... [2020-09-25 11:24:10,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10" (1/1) ... [2020-09-25 11:24:10,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10" (1/1) ... [2020-09-25 11:24:10,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10" (1/1) ... [2020-09-25 11:24:10,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10" (1/1) ... [2020-09-25 11:24:10,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:24:10,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:24:10,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:24:10,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:24:10,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10" (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 [2020-09-25 11:24:10,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:24:10,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:24:10,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:24:10,820 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:24:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:24:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:24:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:24:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:24:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 11:24:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 11:24:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 11:24:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 11:24:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:24:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:24:11,134 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:24:11,135 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 11:24:11,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:24:11 BoogieIcfgContainer [2020-09-25 11:24:11,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:24:11,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:24:11,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:24:11,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:24:11,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:24:10" (1/3) ... [2020-09-25 11:24:11,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69eb788a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:24:11, skipping insertion in model container [2020-09-25 11:24:11,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:24:10" (2/3) ... [2020-09-25 11:24:11,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69eb788a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:24:11, skipping insertion in model container [2020-09-25 11:24:11,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:24:11" (3/3) ... [2020-09-25 11:24:11,151 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-09-25 11:24:11,165 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:24:11,176 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:24:11,213 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:24:11,247 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:24:11,247 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:24:11,247 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:24:11,247 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:24:11,247 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:24:11,247 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:24:11,248 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:24:11,248 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:24:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-09-25 11:24:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 11:24:11,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:11,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:11,279 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:11,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-09-25 11:24:11,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:11,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210595277] [2020-09-25 11:24:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:11,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:11,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:11,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:11,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:11,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 11:24:11,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:24:11,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-09-25 11:24:11,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:11,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:11,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:24:11,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:24:11,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:24:11,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:24:11,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:11,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:11,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:11,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:11,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:11,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 11:24:11,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:11,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:11,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:11,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:11,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:11,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:24:11,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210595277] [2020-09-25 11:24:11,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:24:11,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 11:24:11,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956227] [2020-09-25 11:24:11,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:24:11,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:24:11,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:24:11,940 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-09-25 11:24:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:12,234 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2020-09-25 11:24:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:24:12,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-25 11:24:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:12,248 INFO L225 Difference]: With dead ends: 83 [2020-09-25 11:24:12,248 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 11:24:12,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:24:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 11:24:12,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-09-25 11:24:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 11:24:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-25 11:24:12,308 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 17 [2020-09-25 11:24:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:12,308 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-25 11:24:12,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:24:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-25 11:24:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 11:24:12,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:12,310 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:12,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:24:12,311 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:12,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1756759471, now seen corresponding path program 1 times [2020-09-25 11:24:12,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:12,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423585322] [2020-09-25 11:24:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:12,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:12,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:12,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:13,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:13,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 11:24:13,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:24:13,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-09-25 11:24:13,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:13,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:13,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:24:13,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:13,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:24:13,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:13,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:13,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:13,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:13,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:13,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:13,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 11:24:13,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:13,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:13,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:13,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:13,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:24:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:13,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423585322] [2020-09-25 11:24:13,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:13,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 11:24:13,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787110652] [2020-09-25 11:24:13,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:24:13,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:13,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:24:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:24:13,207 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2020-09-25 11:24:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:13,423 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-09-25 11:24:13,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 11:24:13,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 11:24:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:13,426 INFO L225 Difference]: With dead ends: 59 [2020-09-25 11:24:13,426 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 11:24:13,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 11:24:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 11:24:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-09-25 11:24:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-25 11:24:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-09-25 11:24:13,436 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 33 [2020-09-25 11:24:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:13,437 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-09-25 11:24:13,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:24:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-09-25 11:24:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 11:24:13,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:13,439 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:13,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:24:13,440 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:13,440 INFO L82 PathProgramCache]: Analyzing trace with hash 737263125, now seen corresponding path program 2 times [2020-09-25 11:24:13,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:13,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277176649] [2020-09-25 11:24:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:13,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:13,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:13,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:13,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:14,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:14,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 11:24:14,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-09-25 11:24:14,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:14,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:24:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 11:24:14,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:14,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:14,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:14,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:14,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:14,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:14,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:24:14,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:14,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:14,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:14,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277176649] [2020-09-25 11:24:14,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:14,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:24:14,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634398623] [2020-09-25 11:24:14,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:24:14,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:14,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:24:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:24:14,783 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 10 states. [2020-09-25 11:24:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:15,051 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-09-25 11:24:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:24:15,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-25 11:24:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:15,053 INFO L225 Difference]: With dead ends: 66 [2020-09-25 11:24:15,053 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 11:24:15,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:24:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 11:24:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-09-25 11:24:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 11:24:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-09-25 11:24:15,074 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2020-09-25 11:24:15,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:15,074 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-09-25 11:24:15,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:24:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-09-25 11:24:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 11:24:15,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:15,080 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-09-25 11:24:15,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:24:15,083 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:15,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:15,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1672550673, now seen corresponding path program 3 times [2020-09-25 11:24:15,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:15,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027044042] [2020-09-25 11:24:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:15,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:15,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:15,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:15,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:16,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:16,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 11:24:16,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:16,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1458 [2020-09-25 11:24:16,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:16,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:24:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 11:24:16,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:24:16,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:16,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:16,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:16,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:16,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:24:16,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:16,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:16,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:16,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:16,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:16,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:16,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027044042] [2020-09-25 11:24:16,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:16,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 11:24:16,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409614675] [2020-09-25 11:24:16,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 11:24:16,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:16,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 11:24:16,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-25 11:24:16,707 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 12 states. [2020-09-25 11:24:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:16,983 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-09-25 11:24:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 11:24:16,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-09-25 11:24:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:16,985 INFO L225 Difference]: With dead ends: 73 [2020-09-25 11:24:16,985 INFO L226 Difference]: Without dead ends: 64 [2020-09-25 11:24:16,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-25 11:24:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-25 11:24:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-09-25 11:24:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 11:24:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-25 11:24:16,994 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2020-09-25 11:24:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:16,994 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-25 11:24:16,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 11:24:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-25 11:24:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-25 11:24:16,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:16,996 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1] [2020-09-25 11:24:16,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:24:16,997 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:16,997 INFO L82 PathProgramCache]: Analyzing trace with hash 504689877, now seen corresponding path program 4 times [2020-09-25 11:24:16,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:16,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496400047] [2020-09-25 11:24:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:17,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:17,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:17,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:17,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:18,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:18,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-25 11:24:18,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:18,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-09-25 11:24:18,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:18,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:24:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 11:24:18,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:18,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:18,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:18,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:18,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:18,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:18,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:24:18,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:18,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:18,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:18,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:18,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:18,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:24:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:18,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496400047] [2020-09-25 11:24:18,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:18,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 11:24:18,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003015208] [2020-09-25 11:24:18,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 11:24:18,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:18,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 11:24:18,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:24:18,461 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 14 states. [2020-09-25 11:24:18,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:18,782 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2020-09-25 11:24:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 11:24:18,783 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-09-25 11:24:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:18,784 INFO L225 Difference]: With dead ends: 75 [2020-09-25 11:24:18,784 INFO L226 Difference]: Without dead ends: 69 [2020-09-25 11:24:18,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-09-25 11:24:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-25 11:24:18,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-09-25 11:24:18,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 11:24:18,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-25 11:24:18,792 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 54 [2020-09-25 11:24:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:18,793 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-25 11:24:18,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 11:24:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-25 11:24:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 11:24:18,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:18,795 INFO L422 BasicCegarLoop]: trace histogram [6, 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, 1] [2020-09-25 11:24:18,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:24:18,795 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash -182151121, now seen corresponding path program 5 times [2020-09-25 11:24:18,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:18,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389967131] [2020-09-25 11:24:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:18,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:18,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:18,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:19,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:20,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:20,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 11:24:20,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:20,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1348 [2020-09-25 11:24:20,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:20,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:20,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 11:24:20,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:20,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 11:24:20,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:20,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:20,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:20,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:20,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:20,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:20,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:24:20,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:20,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:20,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:20,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:20,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:20,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:20,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389967131] [2020-09-25 11:24:20,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:20,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 11:24:20,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491884539] [2020-09-25 11:24:20,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 11:24:20,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:20,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 11:24:20,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:24:20,332 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 16 states. [2020-09-25 11:24:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:20,711 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-09-25 11:24:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 11:24:20,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-09-25 11:24:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:20,713 INFO L225 Difference]: With dead ends: 87 [2020-09-25 11:24:20,713 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 11:24:20,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-09-25 11:24:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 11:24:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-09-25 11:24:20,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 11:24:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-25 11:24:20,721 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2020-09-25 11:24:20,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:20,722 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-25 11:24:20,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 11:24:20,722 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-25 11:24:20,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 11:24:20,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:20,723 INFO L422 BasicCegarLoop]: trace histogram [7, 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, 1] [2020-09-25 11:24:20,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:24:20,724 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:20,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:20,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1007592555, now seen corresponding path program 6 times [2020-09-25 11:24:20,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:20,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398981369] [2020-09-25 11:24:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:20,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:20,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:21,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:22,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:22,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 11:24:22,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:22,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1724 [2020-09-25 11:24:22,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:22,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 11:24:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 11:24:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:22,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:22,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:22,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:22,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:22,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:22,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:24:22,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:22,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:22,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:22,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398981369] [2020-09-25 11:24:22,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:22,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 11:24:22,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598336090] [2020-09-25 11:24:22,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 11:24:22,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:22,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 11:24:22,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-09-25 11:24:22,655 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 18 states. [2020-09-25 11:24:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:23,074 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-09-25 11:24:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 11:24:23,075 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-09-25 11:24:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:23,076 INFO L225 Difference]: With dead ends: 94 [2020-09-25 11:24:23,076 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 11:24:23,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2020-09-25 11:24:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 11:24:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-09-25 11:24:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 11:24:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-25 11:24:23,084 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-25 11:24:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:23,084 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-25 11:24:23,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 11:24:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-25 11:24:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 11:24:23,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:23,087 INFO L422 BasicCegarLoop]: trace histogram [8, 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, 1] [2020-09-25 11:24:23,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:24:23,088 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:23,088 INFO L82 PathProgramCache]: Analyzing trace with hash -527754897, now seen corresponding path program 7 times [2020-09-25 11:24:23,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:23,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484812559] [2020-09-25 11:24:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:23,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:23,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:23,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:23,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:24,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:24,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 11:24:24,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:24,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1686 [2020-09-25 11:24:24,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:24,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:24,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 11:24:24,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:24,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 11:24:24,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:25,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:25,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:25,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:25,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:25,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:25,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:24:25,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:25,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:25,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:25,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:25,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:25,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:24:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:25,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484812559] [2020-09-25 11:24:25,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:25,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 11:24:25,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734082799] [2020-09-25 11:24:25,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 11:24:25,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:25,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 11:24:25,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-09-25 11:24:25,229 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 20 states. [2020-09-25 11:24:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:25,872 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-09-25 11:24:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 11:24:25,872 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-09-25 11:24:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:25,873 INFO L225 Difference]: With dead ends: 96 [2020-09-25 11:24:25,874 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 11:24:25,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 11:24:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 11:24:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-25 11:24:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 11:24:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-09-25 11:24:25,889 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 75 [2020-09-25 11:24:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:25,890 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-09-25 11:24:25,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 11:24:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-09-25 11:24:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-25 11:24:25,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:25,892 INFO L422 BasicCegarLoop]: trace histogram [9, 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, 1] [2020-09-25 11:24:25,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 11:24:25,893 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:25,893 INFO L82 PathProgramCache]: Analyzing trace with hash -911019435, now seen corresponding path program 8 times [2020-09-25 11:24:25,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:25,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278131476] [2020-09-25 11:24:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:25,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:25,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:26,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:26,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:27,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:27,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-25 11:24:27,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:27,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1928 [2020-09-25 11:24:27,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:27,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:27,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 11:24:27,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:27,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 11:24:27,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:28,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:28,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:28,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:28,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:28,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:28,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:24:28,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:28,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:28,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:28,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:28,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:28,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:28,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278131476] [2020-09-25 11:24:28,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:28,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 11:24:28,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131710583] [2020-09-25 11:24:28,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 11:24:28,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:28,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 11:24:28,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-09-25 11:24:28,108 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 22 states. [2020-09-25 11:24:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:28,655 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-09-25 11:24:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 11:24:28,658 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-09-25 11:24:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:28,659 INFO L225 Difference]: With dead ends: 108 [2020-09-25 11:24:28,660 INFO L226 Difference]: Without dead ends: 99 [2020-09-25 11:24:28,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 11:24:28,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-25 11:24:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-09-25 11:24:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-25 11:24:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-09-25 11:24:28,679 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 82 [2020-09-25 11:24:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:28,680 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-09-25 11:24:28,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 11:24:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-09-25 11:24:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 11:24:28,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:28,687 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:28,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 11:24:28,687 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:28,688 INFO L82 PathProgramCache]: Analyzing trace with hash -388601169, now seen corresponding path program 9 times [2020-09-25 11:24:28,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:28,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028332054] [2020-09-25 11:24:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:28,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:28,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:28,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:29,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:31,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:31,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-25 11:24:31,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:31,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2561 [2020-09-25 11:24:31,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:31,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:31,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 11:24:31,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:31,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 11:24:31,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:31,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:31,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:31,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:31,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:31,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:31,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:24:31,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:31,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:31,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:31,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:31,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:31,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:31,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028332054] [2020-09-25 11:24:31,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:31,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 11:24:31,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431757511] [2020-09-25 11:24:31,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 11:24:31,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:31,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 11:24:31,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-09-25 11:24:31,552 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 24 states. [2020-09-25 11:24:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:32,139 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2020-09-25 11:24:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 11:24:32,139 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-09-25 11:24:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:32,140 INFO L225 Difference]: With dead ends: 115 [2020-09-25 11:24:32,141 INFO L226 Difference]: Without dead ends: 106 [2020-09-25 11:24:32,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=514, Invalid=1378, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 11:24:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-25 11:24:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2020-09-25 11:24:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-25 11:24:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-09-25 11:24:32,148 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 89 [2020-09-25 11:24:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:32,149 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-09-25 11:24:32,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 11:24:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-09-25 11:24:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-25 11:24:32,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:32,150 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:32,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 11:24:32,151 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash 512080149, now seen corresponding path program 10 times [2020-09-25 11:24:32,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:32,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215627568] [2020-09-25 11:24:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:32,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:32,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:32,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:32,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:34,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:34,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-25 11:24:34,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:34,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2679 [2020-09-25 11:24:34,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:34,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:34,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 11:24:34,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:34,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 11:24:34,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:35,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:35,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:35,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:35,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:35,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:35,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:24:35,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:35,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:35,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:35,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:35,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:24:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:35,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215627568] [2020-09-25 11:24:35,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:35,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 11:24:35,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903285223] [2020-09-25 11:24:35,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 11:24:35,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:35,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 11:24:35,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2020-09-25 11:24:35,214 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 26 states. [2020-09-25 11:24:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:36,009 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2020-09-25 11:24:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 11:24:36,010 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-09-25 11:24:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:36,011 INFO L225 Difference]: With dead ends: 122 [2020-09-25 11:24:36,011 INFO L226 Difference]: Without dead ends: 113 [2020-09-25 11:24:36,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=619, Invalid=1637, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 11:24:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-25 11:24:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2020-09-25 11:24:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-25 11:24:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-09-25 11:24:36,018 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 96 [2020-09-25 11:24:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:36,019 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-09-25 11:24:36,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 11:24:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-09-25 11:24:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-25 11:24:36,020 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:36,020 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:36,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 11:24:36,021 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:36,021 INFO L82 PathProgramCache]: Analyzing trace with hash -178615313, now seen corresponding path program 11 times [2020-09-25 11:24:36,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:36,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584029637] [2020-09-25 11:24:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:36,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:36,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:36,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:36,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:38,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:38,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-25 11:24:38,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:38,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2881 [2020-09-25 11:24:38,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:38,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:38,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 11:24:38,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:38,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-25 11:24:38,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:24:39,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:39,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:39,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:39,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:39,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:39,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:24:39,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:39,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:39,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:39,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:39,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:39,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:39,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584029637] [2020-09-25 11:24:39,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:39,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-25 11:24:39,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453896222] [2020-09-25 11:24:39,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-25 11:24:39,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:39,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-25 11:24:39,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2020-09-25 11:24:39,367 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 28 states. [2020-09-25 11:24:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:40,132 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-09-25 11:24:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 11:24:40,133 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 103 [2020-09-25 11:24:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:40,134 INFO L225 Difference]: With dead ends: 129 [2020-09-25 11:24:40,134 INFO L226 Difference]: Without dead ends: 120 [2020-09-25 11:24:40,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=734, Invalid=1918, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 11:24:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-25 11:24:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2020-09-25 11:24:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 11:24:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-09-25 11:24:40,147 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 103 [2020-09-25 11:24:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:40,147 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-09-25 11:24:40,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-25 11:24:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-09-25 11:24:40,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-25 11:24:40,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:40,150 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:40,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 11:24:40,151 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:40,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1265258539, now seen corresponding path program 12 times [2020-09-25 11:24:40,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:40,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110188553] [2020-09-25 11:24:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:40,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:40,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:40,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:40,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:43,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:43,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-25 11:24:43,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:43,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3017 [2020-09-25 11:24:43,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:43,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 11:24:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:43,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-25 11:24:43,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:24:43,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:43,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:43,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:43,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:43,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:43,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:24:43,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:43,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:43,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:43,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:43,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:43,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:43,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110188553] [2020-09-25 11:24:43,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:43,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 11:24:43,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386163347] [2020-09-25 11:24:43,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 11:24:43,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 11:24:43,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2020-09-25 11:24:43,608 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 30 states. [2020-09-25 11:24:44,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:44,545 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2020-09-25 11:24:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-25 11:24:44,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2020-09-25 11:24:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:44,547 INFO L225 Difference]: With dead ends: 136 [2020-09-25 11:24:44,547 INFO L226 Difference]: Without dead ends: 127 [2020-09-25 11:24:44,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=859, Invalid=2221, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 11:24:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-25 11:24:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2020-09-25 11:24:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-25 11:24:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-09-25 11:24:44,554 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 110 [2020-09-25 11:24:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:44,555 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-09-25 11:24:44,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 11:24:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-09-25 11:24:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-25 11:24:44,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:44,556 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:44,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 11:24:44,557 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1972667089, now seen corresponding path program 13 times [2020-09-25 11:24:44,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:44,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026932540] [2020-09-25 11:24:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:44,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:44,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:44,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:45,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:47,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:47,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-25 11:24:47,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:47,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2843 [2020-09-25 11:24:47,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:47,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:47,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-25 11:24:47,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:47,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-25 11:24:47,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:47,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:47,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:47,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:47,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:47,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:47,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:24:47,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:47,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:47,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:47,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:47,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:47,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:47,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026932540] [2020-09-25 11:24:47,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:47,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-25 11:24:47,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169705344] [2020-09-25 11:24:47,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-25 11:24:47,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:47,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-25 11:24:47,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2020-09-25 11:24:47,976 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 32 states. [2020-09-25 11:24:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:48,986 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2020-09-25 11:24:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-25 11:24:48,987 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 117 [2020-09-25 11:24:48,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:48,989 INFO L225 Difference]: With dead ends: 143 [2020-09-25 11:24:48,989 INFO L226 Difference]: Without dead ends: 134 [2020-09-25 11:24:48,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=994, Invalid=2546, Unknown=0, NotChecked=0, Total=3540 [2020-09-25 11:24:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-25 11:24:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2020-09-25 11:24:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 11:24:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-09-25 11:24:48,997 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 117 [2020-09-25 11:24:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:48,998 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-09-25 11:24:48,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-25 11:24:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-09-25 11:24:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-25 11:24:49,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:49,000 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:49,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 11:24:49,000 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:49,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1091491477, now seen corresponding path program 14 times [2020-09-25 11:24:49,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:49,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922059981] [2020-09-25 11:24:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:49,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:49,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:49,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:52,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:52,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-09-25 11:24:52,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:52,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3010 [2020-09-25 11:24:52,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:52,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:52,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 11:24:52,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:52,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-09-25 11:24:52,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:24:52,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:52,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:52,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:52,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:52,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 11:24:52,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:52,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:52,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:52,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922059981] [2020-09-25 11:24:52,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:52,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-25 11:24:52,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391636186] [2020-09-25 11:24:52,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-25 11:24:52,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:52,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-25 11:24:52,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 11:24:52,655 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 34 states. [2020-09-25 11:24:53,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:53,816 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2020-09-25 11:24:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-25 11:24:53,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 124 [2020-09-25 11:24:53,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:53,820 INFO L225 Difference]: With dead ends: 150 [2020-09-25 11:24:53,820 INFO L226 Difference]: Without dead ends: 141 [2020-09-25 11:24:53,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1139, Invalid=2893, Unknown=0, NotChecked=0, Total=4032 [2020-09-25 11:24:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-25 11:24:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2020-09-25 11:24:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-25 11:24:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-09-25 11:24:53,835 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 124 [2020-09-25 11:24:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:53,837 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-09-25 11:24:53,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-25 11:24:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-09-25 11:24:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-25 11:24:53,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:53,839 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:53,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 11:24:53,840 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash 157105775, now seen corresponding path program 15 times [2020-09-25 11:24:53,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:53,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513667850] [2020-09-25 11:24:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:53,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:53,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:54,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:54,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:57,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:57,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-25 11:24:57,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:57,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3388 [2020-09-25 11:24:57,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:57,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:57,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 11:24:57,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 11:24:57,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-25 11:24:57,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:24:57,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:57,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:57,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:24:57,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:57,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:24:57,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:57,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:57,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:57,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:57,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:57,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:57,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513667850] [2020-09-25 11:24:57,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:57,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-25 11:24:57,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091171326] [2020-09-25 11:24:57,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-25 11:24:57,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-25 11:24:57,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=966, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 11:24:57,962 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 36 states. [2020-09-25 11:24:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:59,238 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2020-09-25 11:24:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-25 11:24:59,239 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 131 [2020-09-25 11:24:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:59,241 INFO L225 Difference]: With dead ends: 157 [2020-09-25 11:24:59,241 INFO L226 Difference]: Without dead ends: 148 [2020-09-25 11:24:59,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1294, Invalid=3262, Unknown=0, NotChecked=0, Total=4556 [2020-09-25 11:24:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-25 11:24:59,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2020-09-25 11:24:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-25 11:24:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-09-25 11:24:59,247 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 131 [2020-09-25 11:24:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:59,248 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-09-25 11:24:59,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-25 11:24:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-09-25 11:24:59,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-25 11:24:59,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:59,249 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:59,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 11:24:59,250 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:59,250 INFO L82 PathProgramCache]: Analyzing trace with hash -65196715, now seen corresponding path program 16 times [2020-09-25 11:24:59,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:59,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267617648] [2020-09-25 11:24:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:59,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:59,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking...