/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/res2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:11:59,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:11:59,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:11:59,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:11:59,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:11:59,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:11:59,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:11:59,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:11:59,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:11:59,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:11:59,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:11:59,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:11:59,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:11:59,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:11:59,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:11:59,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:11:59,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:11:59,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:11:59,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:11:59,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:11:59,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:11:59,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:11:59,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:11:59,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:11:59,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:11:59,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:11:59,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:11:59,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:11:59,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:11:59,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:11:59,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:11:59,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:11:59,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:11:59,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:11:59,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:11:59,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:11:59,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:11:59,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:11:59,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:11:59,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:11:59,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:11:59,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:11:59,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:11:59,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:11:59,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:11:59,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:11:59,113 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:11:59,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:11:59,113 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:11:59,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:11:59,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:11:59,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:11:59,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:11:59,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:11:59,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:11:59,116 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:11:59,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:11:59,117 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:11:59,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:11:59,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:11:59,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:11:59,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:11:59,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:11:59,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:11:59,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:11:59,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:11:59,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:11:59,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:11:59,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:11:59,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:11:59,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:11:59,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:11:59,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:11:59,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:11:59,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:11:59,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:11:59,465 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:11:59,466 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2.c [2020-10-12 10:11:59,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3923693bb/5195f7386c244fd993b47cc35d5e369d/FLAGaa9cd3d8c [2020-10-12 10:11:59,999 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:12:00,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res2.c [2020-10-12 10:12:00,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3923693bb/5195f7386c244fd993b47cc35d5e369d/FLAGaa9cd3d8c [2020-10-12 10:12:00,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3923693bb/5195f7386c244fd993b47cc35d5e369d [2020-10-12 10:12:00,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:12:00,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:12:00,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:12:00,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:12:00,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:12:00,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:12:00" (1/1) ... [2020-10-12 10:12:00,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b3ac5cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00, skipping insertion in model container [2020-10-12 10:12:00,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:12:00" (1/1) ... [2020-10-12 10:12:00,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:12:00,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:12:00,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:12:00,640 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:12:00,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:12:00,766 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:12:00,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00 WrapperNode [2020-10-12 10:12:00,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:12:00,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:12:00,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:12:00,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:12:00,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00" (1/1) ... [2020-10-12 10:12:00,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00" (1/1) ... [2020-10-12 10:12:00,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00" (1/1) ... [2020-10-12 10:12:00,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00" (1/1) ... [2020-10-12 10:12:00,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00" (1/1) ... [2020-10-12 10:12:00,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00" (1/1) ... [2020-10-12 10:12:00,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00" (1/1) ... [2020-10-12 10:12:00,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:12:00,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:12:00,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:12:00,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:12:00,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:12:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:12:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:12:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:12:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:12:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:12:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:12:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:12:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:12:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:12:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:12:00,893 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:12:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:12:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:12:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:12:00,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:12:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:12:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:12:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:12:00,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:12:01,226 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:12:01,226 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-12 10:12:01,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:12:01 BoogieIcfgContainer [2020-10-12 10:12:01,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:12:01,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:12:01,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:12:01,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:12:01,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:12:00" (1/3) ... [2020-10-12 10:12:01,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4149b394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:12:01, skipping insertion in model container [2020-10-12 10:12:01,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:12:00" (2/3) ... [2020-10-12 10:12:01,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4149b394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:12:01, skipping insertion in model container [2020-10-12 10:12:01,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:12:01" (3/3) ... [2020-10-12 10:12:01,241 INFO L109 eAbstractionObserver]: Analyzing ICFG res2.c [2020-10-12 10:12:01,253 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:12:01,262 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:12:01,278 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:12:01,304 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:12:01,305 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:12:01,305 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:12:01,306 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:12:01,306 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:12:01,306 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:12:01,306 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:12:01,307 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:12:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-12 10:12:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 10:12:01,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:01,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:01,349 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1797528887, now seen corresponding path program 1 times [2020-10-12 10:12:01,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:01,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298089416] [2020-10-12 10:12:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:01,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:02,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 10:12:02,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:12:02,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1389 [2020-10-12 10:12:02,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:02,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:12:02,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:12:02,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:12:02,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:12:03,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:03,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:03,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:03,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:03,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:12:03,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:03,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:03,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:03,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:03,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:03,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:03,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:03,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:03,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:12:03,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:12:03,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:03,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:12:03,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:03,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:12:03,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:03,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298089416] [2020-10-12 10:12:03,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:12:03,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 10:12:03,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309727099] [2020-10-12 10:12:03,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:12:03,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:03,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:12:03,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:12:03,101 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 8 states. [2020-10-12 10:12:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:03,563 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2020-10-12 10:12:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:12:03,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-12 10:12:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:03,580 INFO L225 Difference]: With dead ends: 98 [2020-10-12 10:12:03,580 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:12:03,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:12:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:12:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 10:12:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:12:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-12 10:12:03,677 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 29 [2020-10-12 10:12:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:03,678 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-12 10:12:03,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:12:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-12 10:12:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:12:03,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:03,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:03,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:12:03,681 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:03,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:03,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1710123337, now seen corresponding path program 1 times [2020-10-12 10:12:03,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:03,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244947299] [2020-10-12 10:12:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:03,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:03,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:07,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:07,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:12:07,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:12:07,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3848 [2020-10-12 10:12:07,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:07,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:12:07,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 10:12:07,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 10:12:07,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:07,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:07,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:07,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:07,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:07,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:07,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:12:07,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:07,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:07,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:07,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:07,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:07,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:07,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:07,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:07,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:07,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:07,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:07,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:07,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:07,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:07,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:07,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:07,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244947299] [2020-10-12 10:12:07,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:12:07,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:12:07,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152304897] [2020-10-12 10:12:07,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:12:07,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:07,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:12:07,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:12:07,650 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 6 states. [2020-10-12 10:12:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:07,954 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2020-10-12 10:12:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:12:07,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-12 10:12:07,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:07,957 INFO L225 Difference]: With dead ends: 92 [2020-10-12 10:12:07,958 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 10:12:07,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:12:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 10:12:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-10-12 10:12:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 10:12:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-12 10:12:07,980 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-12 10:12:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:07,981 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-12 10:12:07,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:12:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-12 10:12:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:12:07,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:07,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:07,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:12:07,985 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1155788663, now seen corresponding path program 1 times [2020-10-12 10:12:07,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:07,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350629104] [2020-10-12 10:12:07,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:08,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:12,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:12:12,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:12:12,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4953 [2020-10-12 10:12:12,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:12,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:12:12,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:12,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:12:12,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:13,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:13,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:13,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:13,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:13,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:13,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:13,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:13,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:13,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:13,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:13,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:13,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:13,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:13,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:13,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:13,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:13,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:12:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:13,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350629104] [2020-10-12 10:12:13,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:13,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:12:13,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393629691] [2020-10-12 10:12:13,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:12:13,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:13,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:12:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:12:13,124 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 8 states. [2020-10-12 10:12:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:13,402 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-12 10:12:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:12:13,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-12 10:12:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:13,405 INFO L225 Difference]: With dead ends: 61 [2020-10-12 10:12:13,405 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:12:13,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:12:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:12:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 10:12:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:12:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-12 10:12:13,422 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 31 [2020-10-12 10:12:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:13,423 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-12 10:12:13,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:12:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-12 10:12:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:12:13,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:13,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:13,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:12:13,424 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1942598005, now seen corresponding path program 1 times [2020-10-12 10:12:13,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:13,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419385483] [2020-10-12 10:12:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:13,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:14,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:18,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 10:12:18,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:12:18,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4561 [2020-10-12 10:12:18,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:12:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:12:18,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:18,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:18,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:18,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:18,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:18,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:18,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:18,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:18,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:18,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:18,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:18,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:18,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:18,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:18,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:18,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:18,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:18,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:18,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419385483] [2020-10-12 10:12:18,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:18,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:12:18,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518120403] [2020-10-12 10:12:18,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:12:18,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:18,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:12:18,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:12:18,404 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 13 states. [2020-10-12 10:12:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:18,992 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-12 10:12:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:12:18,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-12 10:12:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:18,997 INFO L225 Difference]: With dead ends: 71 [2020-10-12 10:12:18,997 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 10:12:18,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:12:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 10:12:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-12 10:12:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 10:12:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-12 10:12:19,007 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2020-10-12 10:12:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:19,008 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-12 10:12:19,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:12:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-12 10:12:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:12:19,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:19,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:19,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:12:19,010 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1828856755, now seen corresponding path program 1 times [2020-10-12 10:12:19,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:19,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18465288] [2020-10-12 10:12:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:19,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:19,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:22,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 10:12:22,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 10:12:22,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3544 [2020-10-12 10:12:22,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:12:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:22,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:12:22,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:22,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:22,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:22,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:22,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:22,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:12:22,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:22,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:22,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:22,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:22,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:22,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:22,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:22,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:22,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:22,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:22,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:22,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:22,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18465288] [2020-10-12 10:12:22,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:22,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:12:22,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997795124] [2020-10-12 10:12:22,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:12:22,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:22,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:12:22,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:12:22,907 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 15 states. [2020-10-12 10:12:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:24,118 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-12 10:12:24,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:12:24,119 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-12 10:12:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:24,121 INFO L225 Difference]: With dead ends: 85 [2020-10-12 10:12:24,122 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 10:12:24,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:12:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 10:12:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-10-12 10:12:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 10:12:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-10-12 10:12:24,146 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 35 [2020-10-12 10:12:24,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:24,147 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-10-12 10:12:24,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:12:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-10-12 10:12:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:12:24,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:24,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:24,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:12:24,152 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:24,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2142835725, now seen corresponding path program 2 times [2020-10-12 10:12:24,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:24,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021158990] [2020-10-12 10:12:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:24,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:29,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 10:12:29,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 10:12:29,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:12:29,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:29,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:12:29,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:29,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:12:29,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:29,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:29,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:29,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:29,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:29,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:29,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:29,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:29,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:29,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:29,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:29,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:29,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:29,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:29,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:29,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:29,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:29,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:29,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:29,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021158990] [2020-10-12 10:12:29,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:29,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:12:29,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432168790] [2020-10-12 10:12:29,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:12:29,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:29,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:12:29,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:12:29,660 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 15 states. [2020-10-12 10:12:30,420 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-12 10:12:30,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:30,834 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-12 10:12:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:12:30,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-12 10:12:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:30,836 INFO L225 Difference]: With dead ends: 79 [2020-10-12 10:12:30,836 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 10:12:30,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:12:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 10:12:30,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-10-12 10:12:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 10:12:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-10-12 10:12:30,846 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 35 [2020-10-12 10:12:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:30,847 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-10-12 10:12:30,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:12:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-10-12 10:12:30,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:12:30,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:30,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:30,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:12:30,849 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:30,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1466799155, now seen corresponding path program 3 times [2020-10-12 10:12:30,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:30,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158381949] [2020-10-12 10:12:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:30,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:35,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 10:12:35,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 10:12:35,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:12:35,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:35,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:12:35,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:35,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:12:35,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:36,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:36,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:36,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:36,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:36,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:36,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:36,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:36,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:36,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:36,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:36,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:36,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:36,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:36,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:36,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:36,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:36,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:36,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:36,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158381949] [2020-10-12 10:12:36,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:36,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:12:36,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7123560] [2020-10-12 10:12:36,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:12:36,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:36,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:12:36,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:12:36,102 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 14 states. [2020-10-12 10:12:36,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:36,737 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-12 10:12:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:12:36,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-12 10:12:36,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:36,740 INFO L225 Difference]: With dead ends: 79 [2020-10-12 10:12:36,740 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 10:12:36,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:12:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 10:12:36,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-10-12 10:12:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 10:12:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-10-12 10:12:36,750 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 35 [2020-10-12 10:12:36,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:36,750 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-10-12 10:12:36,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:12:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-10-12 10:12:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:12:36,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:36,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:36,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:12:36,752 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:36,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:36,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1215486415, now seen corresponding path program 1 times [2020-10-12 10:12:36,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:36,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570321886] [2020-10-12 10:12:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:38,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:38,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:38,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:38,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:38,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:38,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:39,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:39,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:41,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:41,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:12:41,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-12 10:12:41,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:12:41,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:41,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:12:41,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:41,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:12:41,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:42,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:42,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:42,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:42,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:42,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:42,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:42,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:42,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:42,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:42,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:42,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:42,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:42,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:42,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:42,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:42,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:42,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:42,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:42,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:42,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570321886] [2020-10-12 10:12:42,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:42,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:12:42,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093928522] [2020-10-12 10:12:42,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:12:42,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:42,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:12:42,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:12:42,414 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 19 states. [2020-10-12 10:12:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:43,417 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2020-10-12 10:12:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:12:43,418 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-12 10:12:43,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:43,420 INFO L225 Difference]: With dead ends: 92 [2020-10-12 10:12:43,420 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 10:12:43,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:12:43,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 10:12:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2020-10-12 10:12:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 10:12:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-12 10:12:43,431 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 37 [2020-10-12 10:12:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:43,432 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-12 10:12:43,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:12:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-12 10:12:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:12:43,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:43,433 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:43,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:12:43,434 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:43,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1327150769, now seen corresponding path program 2 times [2020-10-12 10:12:43,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:43,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935469834] [2020-10-12 10:12:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:43,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:44,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:48,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:12:48,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 10:12:48,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:12:48,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:12:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:12:48,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:48,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:48,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:48,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:48,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:48,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:12:48,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:48,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:48,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:48,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:48,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:48,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:48,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:48,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:48,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:48,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:48,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:48,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:48,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:48,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:48,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:48,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935469834] [2020-10-12 10:12:48,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:48,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:12:48,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393586650] [2020-10-12 10:12:48,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:12:48,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:48,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:12:48,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:12:48,873 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 17 states. [2020-10-12 10:12:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:49,982 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2020-10-12 10:12:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:12:49,982 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-12 10:12:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:49,983 INFO L225 Difference]: With dead ends: 107 [2020-10-12 10:12:49,983 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 10:12:49,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:12:49,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 10:12:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 73. [2020-10-12 10:12:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 10:12:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-10-12 10:12:50,000 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 37 [2020-10-12 10:12:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:50,000 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-10-12 10:12:50,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:12:50,000 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-10-12 10:12:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:12:50,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:50,002 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:50,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:12:50,002 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1650425585, now seen corresponding path program 4 times [2020-10-12 10:12:50,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:50,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600506093] [2020-10-12 10:12:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:50,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:55,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:55,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:12:55,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-12 10:12:55,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:12:55,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:55,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:12:55,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:55,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:12:55,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:55,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:55,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:55,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:55,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:55,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:55,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:55,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:55,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:55,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:55,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:55,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:55,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:55,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:55,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:55,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:55,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:55,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:55,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:55,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:55,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600506093] [2020-10-12 10:12:55,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:55,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:12:55,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235157327] [2020-10-12 10:12:55,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:12:55,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:12:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:12:55,077 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 9 states. [2020-10-12 10:12:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:55,408 INFO L93 Difference]: Finished difference Result 161 states and 199 transitions. [2020-10-12 10:12:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:12:55,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-12 10:12:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:55,410 INFO L225 Difference]: With dead ends: 161 [2020-10-12 10:12:55,411 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 10:12:55,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:12:55,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 10:12:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2020-10-12 10:12:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 10:12:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2020-10-12 10:12:55,425 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 37 [2020-10-12 10:12:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:55,425 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2020-10-12 10:12:55,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:12:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2020-10-12 10:12:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:12:55,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:55,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:55,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:12:55,428 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:55,428 INFO L82 PathProgramCache]: Analyzing trace with hash -938383599, now seen corresponding path program 1 times [2020-10-12 10:12:55,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:55,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258850515] [2020-10-12 10:12:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:55,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:55,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:55,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:55,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:55,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:55,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:56,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:57,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:58,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:59,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:59,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:00,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:00,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:00,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:13:00,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-12 10:13:00,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:13:00,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:13:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:13:00,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:01,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:01,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:01,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:01,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:01,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:01,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:01,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:01,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:01,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:01,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:01,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:01,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:01,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:01,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:01,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:01,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258850515] [2020-10-12 10:13:01,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:01,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:13:01,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661442998] [2020-10-12 10:13:01,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:13:01,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:13:01,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:13:01,166 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand 21 states. [2020-10-12 10:13:02,774 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-12 10:13:03,071 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-12 10:13:03,229 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-12 10:13:04,243 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-12 10:13:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:04,414 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2020-10-12 10:13:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:13:04,414 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-12 10:13:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:04,416 INFO L225 Difference]: With dead ends: 122 [2020-10-12 10:13:04,417 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 10:13:04,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=478, Invalid=1778, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:13:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 10:13:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2020-10-12 10:13:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 10:13:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2020-10-12 10:13:04,439 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 39 [2020-10-12 10:13:04,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:04,440 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2020-10-12 10:13:04,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:13:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2020-10-12 10:13:04,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:13:04,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:04,441 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:04,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:13:04,442 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:04,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:04,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1931118097, now seen corresponding path program 2 times [2020-10-12 10:13:04,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:04,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347300431] [2020-10-12 10:13:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:04,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:05,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:09,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:09,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:09,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:13:09,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:13:09,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:13:09,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:13:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:13:09,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:09,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:09,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:09,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:09,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:09,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:09,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:09,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:09,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:09,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:09,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:09,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:09,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:09,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:09,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:09,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:09,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:09,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:09,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:09,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:13:09,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347300431] [2020-10-12 10:13:09,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:09,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:13:09,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728277421] [2020-10-12 10:13:09,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:13:09,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:09,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:13:09,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:13:09,749 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand 17 states. [2020-10-12 10:13:10,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:10,656 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2020-10-12 10:13:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:13:10,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-12 10:13:10,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:10,658 INFO L225 Difference]: With dead ends: 116 [2020-10-12 10:13:10,658 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 10:13:10,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:13:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 10:13:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-12 10:13:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 10:13:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2020-10-12 10:13:10,677 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 39 [2020-10-12 10:13:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:10,678 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2020-10-12 10:13:10,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:13:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2020-10-12 10:13:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:13:10,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:10,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:10,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:13:10,681 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:10,682 INFO L82 PathProgramCache]: Analyzing trace with hash -934793903, now seen corresponding path program 5 times [2020-10-12 10:13:10,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:10,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757264314] [2020-10-12 10:13:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:10,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:15,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:13:15,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-12 10:13:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:13:15,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:13:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:13:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:15,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:15,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:15,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:15,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:15,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:15,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:15,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:15,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:15,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:15,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:15,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:15,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:15,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:15,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:15,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757264314] [2020-10-12 10:13:15,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:15,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:13:15,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639002036] [2020-10-12 10:13:15,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:13:15,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:15,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:13:15,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:13:15,765 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand 10 states. [2020-10-12 10:13:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:16,311 INFO L93 Difference]: Finished difference Result 212 states and 262 transitions. [2020-10-12 10:13:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:13:16,311 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-12 10:13:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:16,313 INFO L225 Difference]: With dead ends: 212 [2020-10-12 10:13:16,314 INFO L226 Difference]: Without dead ends: 162 [2020-10-12 10:13:16,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:13:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-12 10:13:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 137. [2020-10-12 10:13:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 10:13:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 165 transitions. [2020-10-12 10:13:16,331 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 165 transitions. Word has length 39 [2020-10-12 10:13:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:16,331 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 165 transitions. [2020-10-12 10:13:16,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:13:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 165 transitions. [2020-10-12 10:13:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 10:13:16,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:16,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:16,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:13:16,333 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:16,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:16,333 INFO L82 PathProgramCache]: Analyzing trace with hash -774790125, now seen corresponding path program 1 times [2020-10-12 10:13:16,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:16,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593749594] [2020-10-12 10:13:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:16,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:19,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:19,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:21,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 10:13:21,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 42 [2020-10-12 10:13:21,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:13:21,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:21,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:13:21,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:21,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:13:21,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:22,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:22,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:22,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:22,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:22,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:22,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:22,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:22,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:22,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:22,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:22,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:22,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:22,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:22,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:22,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:22,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:22,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:22,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593749594] [2020-10-12 10:13:22,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:22,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:13:22,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232872900] [2020-10-12 10:13:22,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:13:22,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:22,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:13:22,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:13:22,609 INFO L87 Difference]: Start difference. First operand 137 states and 165 transitions. Second operand 24 states. [2020-10-12 10:13:22,805 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-12 10:13:23,698 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-12 10:13:24,497 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-12 10:13:24,691 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-12 10:13:24,870 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-12 10:13:25,196 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-12 10:13:25,410 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2020-10-12 10:13:25,557 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-12 10:13:25,892 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-12 10:13:26,331 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-12 10:13:26,557 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-10-12 10:13:26,851 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-12 10:13:27,012 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-12 10:13:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:27,544 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2020-10-12 10:13:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:13:27,545 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 41 [2020-10-12 10:13:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:27,547 INFO L225 Difference]: With dead ends: 159 [2020-10-12 10:13:27,547 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 10:13:27,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:13:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 10:13:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2020-10-12 10:13:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 10:13:27,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2020-10-12 10:13:27,561 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 41 [2020-10-12 10:13:27,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:27,561 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2020-10-12 10:13:27,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:13:27,562 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2020-10-12 10:13:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 10:13:27,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:27,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:27,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:13:27,563 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:27,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:27,563 INFO L82 PathProgramCache]: Analyzing trace with hash -411104557, now seen corresponding path program 2 times [2020-10-12 10:13:27,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:27,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407749438] [2020-10-12 10:13:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:27,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:28,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:28,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:32,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 10:13:32,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:13:32,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:13:32,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:13:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:13:32,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:32,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:32,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:32,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:32,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:32,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:32,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:32,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:32,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:32,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:32,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:32,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:32,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:32,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:32,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:32,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:32,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:32,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:32,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:13:32,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407749438] [2020-10-12 10:13:32,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:32,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:13:32,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038933118] [2020-10-12 10:13:32,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:13:32,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:32,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:13:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:13:32,639 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand 8 states. [2020-10-12 10:13:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:32,901 INFO L93 Difference]: Finished difference Result 131 states and 160 transitions. [2020-10-12 10:13:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:13:32,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-12 10:13:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:32,902 INFO L225 Difference]: With dead ends: 131 [2020-10-12 10:13:32,902 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 10:13:32,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:13:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 10:13:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-12 10:13:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 10:13:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-12 10:13:32,911 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 41 [2020-10-12 10:13:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:32,912 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-12 10:13:32,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:13:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-12 10:13:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 10:13:32,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:32,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:32,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:13:32,913 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1021500449, now seen corresponding path program 2 times [2020-10-12 10:13:32,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:32,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736700744] [2020-10-12 10:13:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:32,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:33,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:33,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:34,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:34,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:34,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:35,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:35,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:35,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:36,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:37,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:13:37,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:13:37,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:13:37,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:37,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:13:37,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:37,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:13:37,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:39,287 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-12 10:13:39,556 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2020-10-12 10:13:39,829 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-12 10:13:40,234 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2020-10-12 10:13:40,416 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-12 10:13:41,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:41,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:41,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:41,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:41,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:41,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:41,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:41,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:41,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:41,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:41,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:41,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:41,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:41,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:41,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:41,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:41,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:41,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:41,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:41,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:41,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:41,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:41,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736700744] [2020-10-12 10:13:41,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:41,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:13:41,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199282826] [2020-10-12 10:13:41,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:13:41,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:13:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:13:41,852 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 35 states. [2020-10-12 10:13:42,523 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-12 10:13:42,877 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-12 10:13:43,103 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-10-12 10:13:43,331 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-12 10:13:44,181 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2020-10-12 10:13:44,417 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 38 [2020-10-12 10:13:44,621 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-12 10:13:44,822 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-10-12 10:13:45,072 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2020-10-12 10:13:45,346 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2020-10-12 10:13:45,615 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-12 10:13:45,875 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 41 [2020-10-12 10:13:46,092 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2020-10-12 10:13:47,552 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-12 10:13:47,765 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-12 10:13:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:48,105 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2020-10-12 10:13:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:13:48,105 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 53 [2020-10-12 10:13:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:48,107 INFO L225 Difference]: With dead ends: 119 [2020-10-12 10:13:48,107 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 10:13:48,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=479, Invalid=3943, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 10:13:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 10:13:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-12 10:13:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 10:13:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-10-12 10:13:48,117 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 53 [2020-10-12 10:13:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:48,117 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-10-12 10:13:48,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:13:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-10-12 10:13:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 10:13:48,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:48,118 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:48,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:13:48,118 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:48,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1872692259, now seen corresponding path program 3 times [2020-10-12 10:13:48,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:48,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708497229] [2020-10-12 10:13:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:48,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:48,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:48,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:53,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:53,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:13:53,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:13:53,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 10:13:53,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:53,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:13:53,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:53,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:13:53,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:53,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:53,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:53,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:53,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:53,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:53,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:53,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:53,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:53,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:53,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:53,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:53,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:53,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:53,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:53,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:53,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:53,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:53,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:53,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:13:53,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708497229] [2020-10-12 10:13:53,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:53,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:13:53,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678111048] [2020-10-12 10:13:53,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:13:53,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:53,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:13:53,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:13:53,240 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 10 states. [2020-10-12 10:13:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:53,638 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-12 10:13:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:13:53,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-12 10:13:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:53,641 INFO L225 Difference]: With dead ends: 90 [2020-10-12 10:13:53,641 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 10:13:53,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:13:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 10:13:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-12 10:13:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 10:13:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-12 10:13:53,648 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 57 [2020-10-12 10:13:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:53,648 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-12 10:13:53,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:13:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-12 10:13:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 10:13:53,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:53,649 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:53,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:13:53,650 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:53,650 INFO L82 PathProgramCache]: Analyzing trace with hash 739017131, now seen corresponding path program 4 times [2020-10-12 10:13:53,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:53,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87531903] [2020-10-12 10:13:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:53,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:54,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:55,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:56,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:58,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:58,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 10:13:58,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:13:58,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:13:58,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 10:13:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:58,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 10:13:58,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:59,355 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-12 10:13:59,522 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 10:13:59,671 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-12 10:13:59,853 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-12 10:14:00,025 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-12 10:14:00,207 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-12 10:14:00,426 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-12 10:14:00,598 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2020-10-12 10:14:00,769 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-12 10:14:01,084 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-12 10:14:01,261 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-12 10:14:01,503 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2020-10-12 10:14:01,727 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-10-12 10:14:01,951 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2020-10-12 10:14:02,127 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-12 10:14:02,340 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-12 10:14:02,539 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-12 10:14:02,717 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-12 10:14:02,896 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-12 10:14:05,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:05,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:05,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:05,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:05,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:05,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:05,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:05,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:05,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:05,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:05,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:05,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:05,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:05,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:05,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:05,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:05,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:05,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:05,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:05,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87531903] [2020-10-12 10:14:05,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:05,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 10:14:05,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287430462] [2020-10-12 10:14:05,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 10:14:05,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:05,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 10:14:05,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:14:05,075 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 46 states. [2020-10-12 10:14:06,062 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-12 10:14:06,400 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-12 10:14:06,714 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-12 10:14:07,069 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-12 10:14:07,281 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-12 10:14:07,547 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-12 10:14:07,805 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2020-10-12 10:14:08,070 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2020-10-12 10:14:08,377 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 57 [2020-10-12 10:14:08,954 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-10-12 10:14:09,162 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-12 10:14:09,539 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-12 10:14:09,996 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-12 10:14:11,216 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-12 10:14:11,448 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-12 10:14:11,687 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-12 10:14:11,926 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-12 10:14:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:15,543 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-12 10:14:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 10:14:15,544 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 65 [2020-10-12 10:14:15,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:15,546 INFO L225 Difference]: With dead ends: 117 [2020-10-12 10:14:15,546 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 10:14:15,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=812, Invalid=7744, Unknown=0, NotChecked=0, Total=8556 [2020-10-12 10:14:15,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 10:14:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2020-10-12 10:14:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 10:14:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2020-10-12 10:14:15,558 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 65 [2020-10-12 10:14:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:15,559 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2020-10-12 10:14:15,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 10:14:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2020-10-12 10:14:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:14:15,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:15,560 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:15,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:14:15,560 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:15,561 INFO L82 PathProgramCache]: Analyzing trace with hash -116183123, now seen corresponding path program 5 times [2020-10-12 10:14:15,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:15,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999734137] [2020-10-12 10:14:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:15,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:15,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:20,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:20,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 10:14:20,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:14:20,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:14:20,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:20,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:14:20,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 10:14:20,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:14:20,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:20,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:20,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:20,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:20,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:20,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:20,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:20,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:20,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:20,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:20,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:20,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:20,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:20,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:20,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:20,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:20,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:20,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:20,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:20,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:20,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:20,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:20,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 10:14:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999734137] [2020-10-12 10:14:20,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:20,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:14:20,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805076278] [2020-10-12 10:14:20,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:14:20,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:20,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:14:20,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:14:20,723 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand 12 states. [2020-10-12 10:14:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:22,014 INFO L93 Difference]: Finished difference Result 195 states and 218 transitions. [2020-10-12 10:14:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:14:22,015 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-12 10:14:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:22,017 INFO L225 Difference]: With dead ends: 195 [2020-10-12 10:14:22,017 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 10:14:22,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:14:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 10:14:22,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 103. [2020-10-12 10:14:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 10:14:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-10-12 10:14:22,038 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 67 [2020-10-12 10:14:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:22,038 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-10-12 10:14:22,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:14:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-10-12 10:14:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:14:22,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:22,040 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:22,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:14:22,040 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:22,041 INFO L82 PathProgramCache]: Analyzing trace with hash 594575405, now seen corresponding path program 6 times [2020-10-12 10:14:22,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:22,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740597935] [2020-10-12 10:14:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:22,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:25,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:27,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 10:14:27,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:14:27,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:14:27,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:27,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:14:27,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:27,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 10:14:27,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:27,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:27,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:27,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:27,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:27,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:27,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:27,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:27,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:27,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:27,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:27,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:27,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:27,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:27,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:27,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:27,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:27,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:27,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:27,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:27,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 10:14:27,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740597935] [2020-10-12 10:14:27,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:27,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:14:27,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972287486] [2020-10-12 10:14:27,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:14:27,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:27,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:14:27,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:14:27,193 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 12 states. [2020-10-12 10:14:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:27,772 INFO L93 Difference]: Finished difference Result 172 states and 186 transitions. [2020-10-12 10:14:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:14:27,773 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-12 10:14:27,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:27,774 INFO L225 Difference]: With dead ends: 172 [2020-10-12 10:14:27,775 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 10:14:27,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:14:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 10:14:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-12 10:14:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:14:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-12 10:14:27,784 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 67 [2020-10-12 10:14:27,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:27,784 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-12 10:14:27,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:14:27,784 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-12 10:14:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 10:14:27,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:27,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:27,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:14:27,785 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:27,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1709261449, now seen corresponding path program 7 times [2020-10-12 10:14:27,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:27,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41270954] [2020-10-12 10:14:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:27,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:29,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:30,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:32,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:33,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:33,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 10:14:33,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:14:33,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5315 [2020-10-12 10:14:33,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 10:14:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 10:14:33,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:33,595 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-12 10:14:33,727 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-12 10:14:33,913 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-12 10:14:34,045 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-12 10:14:34,933 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-12 10:14:35,113 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-12 10:14:35,301 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2020-10-12 10:14:35,462 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-12 10:14:36,497 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-12 10:14:36,705 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-12 10:14:36,916 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 10:14:37,106 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-12 10:14:37,294 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-12 10:14:37,546 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-12 10:14:37,798 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-12 10:14:38,070 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-12 10:14:38,286 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-12 10:14:38,546 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-12 10:14:38,774 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-12 10:14:38,987 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-12 10:14:39,652 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2020-10-12 10:14:39,875 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-12 10:14:40,117 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2020-10-12 10:14:40,351 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2020-10-12 10:14:40,982 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-12 10:14:42,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:42,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:42,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:42,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:42,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:42,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:42,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:42,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:42,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:42,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:42,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:42,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:42,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:42,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:42,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:42,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:42,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:42,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:42,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:42,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:42,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:42,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:42,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41270954] [2020-10-12 10:14:42,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:42,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 10:14:42,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412030974] [2020-10-12 10:14:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 10:14:42,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 10:14:42,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2967, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 10:14:42,661 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 57 states. [2020-10-12 10:14:44,310 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-12 10:14:44,786 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-10-12 10:14:45,050 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-12 10:14:45,283 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-12 10:14:46,009 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-12 10:14:46,407 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-12 10:14:46,808 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-12 10:14:47,336 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-12 10:14:47,966 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 10:14:48,254 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-12 10:14:48,511 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-12 10:14:48,754 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-12 10:14:49,201 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-12 10:14:49,491 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-10-12 10:14:49,781 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 44 [2020-10-12 10:14:50,062 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-12 10:14:50,344 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-12 10:14:50,651 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-12 10:14:50,880 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-12 10:14:52,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:52,908 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2020-10-12 10:14:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 10:14:52,909 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 77 [2020-10-12 10:14:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:52,911 INFO L225 Difference]: With dead ends: 142 [2020-10-12 10:14:52,911 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 10:14:52,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2335 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=625, Invalid=8881, Unknown=0, NotChecked=0, Total=9506 [2020-10-12 10:14:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 10:14:52,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 123. [2020-10-12 10:14:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 10:14:52,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2020-10-12 10:14:52,930 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 77 [2020-10-12 10:14:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:52,930 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2020-10-12 10:14:52,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 10:14:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2020-10-12 10:14:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 10:14:52,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:52,932 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:52,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:14:52,933 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1248536455, now seen corresponding path program 8 times [2020-10-12 10:14:52,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:52,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711960525] [2020-10-12 10:14:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:52,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:53,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:53,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:53,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:57,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:57,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 10:14:57,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:14:57,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:14:57,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:14:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 10:14:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:14:57,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:58,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:58,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:58,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:58,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:58,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:58,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:14:58,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:58,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:14:58,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:58,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:58,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:58,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:58,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:58,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:58,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:58,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 10:14:58,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711960525] [2020-10-12 10:14:58,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:58,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:14:58,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854777218] [2020-10-12 10:14:58,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:14:58,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:14:58,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:14:58,164 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand 14 states. [2020-10-12 10:14:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:59,069 INFO L93 Difference]: Finished difference Result 265 states and 290 transitions. [2020-10-12 10:14:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:14:59,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-10-12 10:14:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:59,074 INFO L225 Difference]: With dead ends: 265 [2020-10-12 10:14:59,074 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 10:14:59,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:14:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 10:14:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2020-10-12 10:14:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 10:14:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2020-10-12 10:14:59,093 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 79 [2020-10-12 10:14:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:59,093 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2020-10-12 10:14:59,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:14:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2020-10-12 10:14:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 10:14:59,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:59,095 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:59,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:14:59,095 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1342865479, now seen corresponding path program 9 times [2020-10-12 10:14:59,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:59,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360417474] [2020-10-12 10:14:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:59,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:59,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:59,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:59,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:04,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 10:15:04,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:15:04,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:15:04,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:04,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:15:04,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:04,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:15:04,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:04,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:04,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:04,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:04,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:04,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:04,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:04,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:04,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:04,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:04,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:04,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:04,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:04,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:04,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 10:15:04,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360417474] [2020-10-12 10:15:04,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:04,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:15:04,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637431948] [2020-10-12 10:15:04,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:15:04,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:04,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:15:04,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:15:04,263 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand 14 states. [2020-10-12 10:15:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:05,041 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2020-10-12 10:15:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:15:05,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-10-12 10:15:05,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:05,043 INFO L225 Difference]: With dead ends: 136 [2020-10-12 10:15:05,043 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 10:15:05,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:15:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 10:15:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-12 10:15:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 10:15:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-12 10:15:05,056 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 79 [2020-10-12 10:15:05,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:05,056 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-12 10:15:05,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:15:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-12 10:15:05,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 10:15:05,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:05,057 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:05,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:15:05,057 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash -682436797, now seen corresponding path program 10 times [2020-10-12 10:15:05,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:05,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965789240] [2020-10-12 10:15:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:05,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:10,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:10,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 10:15:10,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:15:10,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-12 10:15:10,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:10,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 10:15:10,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:10,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 10:15:10,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:10,766 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-12 10:15:10,894 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-12 10:15:11,103 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-12 10:15:11,231 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-12 10:15:11,391 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-12 10:15:11,541 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-12 10:15:11,780 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-12 10:15:11,969 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-12 10:15:12,165 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-12 10:15:12,431 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2020-10-12 10:15:12,712 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2020-10-12 10:15:12,919 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2020-10-12 10:15:13,171 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 59 [2020-10-12 10:15:13,440 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 54 [2020-10-12 10:15:13,763 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 65 [2020-10-12 10:15:14,036 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-10-12 10:15:14,311 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 57 [2020-10-12 10:15:14,525 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-12 10:15:14,797 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-10-12 10:15:15,038 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2020-10-12 10:15:15,259 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 37 [2020-10-12 10:15:15,497 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-12 10:15:16,190 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2020-10-12 10:15:16,469 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 48 [2020-10-12 10:15:16,755 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 48 [2020-10-12 10:15:17,063 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2020-10-12 10:15:17,418 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-12 10:15:17,790 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-12 10:15:18,179 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-12 10:15:18,532 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-12 10:15:23,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:23,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:23,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:23,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:23,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:23,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:23,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:23,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:23,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:23,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:23,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:23,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:23,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:23,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:23,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:23,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:23,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:23,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:23,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965789240] [2020-10-12 10:15:23,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:23,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-12 10:15:23,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536957602] [2020-10-12 10:15:23,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-12 10:15:23,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:23,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-12 10:15:23,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=4449, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 10:15:23,987 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 70 states. [2020-10-12 10:15:25,821 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-12 10:15:26,469 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2020-10-12 10:15:27,009 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-12 10:15:27,311 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-12 10:15:28,027 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 105 [2020-10-12 10:15:28,408 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-10-12 10:15:28,766 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-12 10:15:29,165 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-12 10:15:30,310 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 107 [2020-10-12 10:15:31,157 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 84 [2020-10-12 10:15:31,709 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2020-10-12 10:15:32,129 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-10-12 10:15:33,066 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 110 [2020-10-12 10:15:33,430 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2020-10-12 10:15:34,675 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 89 [2020-10-12 10:15:35,598 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 88 [2020-10-12 10:15:36,256 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 81 [2020-10-12 10:15:36,891 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 77 [2020-10-12 10:15:37,436 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2020-10-12 10:15:38,003 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2020-10-12 10:15:38,617 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 82 [2020-10-12 10:15:38,941 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-12 10:15:39,561 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 59 [2020-10-12 10:15:40,702 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 106 [2020-10-12 10:15:41,280 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 92 [2020-10-12 10:15:41,882 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-10-12 10:15:42,357 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2020-10-12 10:15:42,642 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-12 10:15:42,920 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-12 10:15:43,348 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-12 10:15:43,749 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-12 10:15:44,188 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-12 10:15:44,591 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-12 10:15:45,130 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-10-12 10:15:45,686 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-12 10:15:46,158 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-12 10:15:46,487 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71