/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=NARROWEST --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/eca-rers2012/Problem19_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:02:33,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:02:33,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:02:33,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:02:33,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:02:33,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:02:34,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:02:34,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:02:34,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:02:34,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:02:34,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:02:34,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:02:34,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:02:34,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:02:34,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:02:34,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:02:34,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:02:34,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:02:34,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:02:34,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:02:34,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:02:34,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:02:34,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:02:34,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:02:34,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:02:34,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:02:34,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:02:34,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:02:34,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:02:34,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:02:34,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:02:34,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:02:34,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:02:34,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:02:34,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:02:34,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:02:34,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:02:34,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:02:34,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:02:34,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:02:34,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:02:34,031 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 [2020-10-13 10:02:34,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:02:34,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:02:34,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:02:34,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:02:34,054 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:02:34,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:02:34,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:02:34,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:02:34,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:02:34,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:02:34,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:02:34,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:02:34,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:02:34,056 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:02:34,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:02:34,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:02:34,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:02:34,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:02:34,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:02:34,057 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:02:34,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:02:34,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:02:34,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:02:34,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:02:34,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:02:34,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:02:34,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:02:34,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:02:34,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:02:34,059 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:02:34,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:02:34,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:02:34,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:02:34,373 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:02:34,373 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:02:34,374 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label22.c [2020-10-13 10:02:34,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ccd40117/ae54f133f6e1467a923b54d62c078307/FLAG298374c95 [2020-10-13 10:02:35,263 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:02:35,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label22.c [2020-10-13 10:02:35,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ccd40117/ae54f133f6e1467a923b54d62c078307/FLAG298374c95 [2020-10-13 10:02:35,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ccd40117/ae54f133f6e1467a923b54d62c078307 [2020-10-13 10:02:35,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:02:35,469 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:02:35,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:02:35,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:02:35,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:02:35,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:02:35" (1/1) ... [2020-10-13 10:02:35,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de13521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:35, skipping insertion in model container [2020-10-13 10:02:35,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:02:35" (1/1) ... [2020-10-13 10:02:35,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:02:35,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:02:38,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:02:38,037 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:02:39,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:02:39,144 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:02:39,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:39 WrapperNode [2020-10-13 10:02:39,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:02:39,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:02:39,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:02:39,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:02:39,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:39" (1/1) ... [2020-10-13 10:02:39,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:39" (1/1) ... [2020-10-13 10:02:39,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:39" (1/1) ... [2020-10-13 10:02:39,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:39" (1/1) ... [2020-10-13 10:02:39,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:39" (1/1) ... [2020-10-13 10:02:39,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:39" (1/1) ... [2020-10-13 10:02:39,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:39" (1/1) ... [2020-10-13 10:02:39,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:02:39,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:02:39,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:02:39,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:02:39,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:39" (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 [2020-10-13 10:02:39,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:02:39,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:02:39,815 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:02:39,815 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:02:39,815 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:02:39,815 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:02:39,815 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:02:39,816 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:02:39,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:02:39,816 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:02:39,816 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:02:39,816 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:02:39,816 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:02:39,817 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:02:39,817 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:02:39,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:02:39,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:02:39,817 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:02:39,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:02:39,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:02:39,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:02:51,791 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:02:51,792 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:02:51,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:02:51 BoogieIcfgContainer [2020-10-13 10:02:51,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:02:51,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:02:51,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:02:51,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:02:51,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:02:35" (1/3) ... [2020-10-13 10:02:51,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3564042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:02:51, skipping insertion in model container [2020-10-13 10:02:51,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:39" (2/3) ... [2020-10-13 10:02:51,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3564042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:02:51, skipping insertion in model container [2020-10-13 10:02:51,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:02:51" (3/3) ... [2020-10-13 10:02:51,827 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label22.c [2020-10-13 10:02:51,837 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:02:51,846 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:02:51,861 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:02:51,895 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:02:51,896 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:02:51,896 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:02:51,896 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:02:51,896 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:02:51,896 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:02:51,896 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:02:51,896 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:02:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:02:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:02:51,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:02:51,952 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] [2020-10-13 10:02:51,952 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:02:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:02:51,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1442037684, now seen corresponding path program 1 times [2020-10-13 10:02:51,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:02:51,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16376639] [2020-10-13 10:02:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:02:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:52,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:52,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:52,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:02:52,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:52,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-13 10:02:52,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:02:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:02:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:02:52,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:02:52,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:02:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:52,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:52,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:52,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:02:52,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:52,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:02:52,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:52,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:02:52,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:02:52,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:02:52,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:02:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:02:52,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16376639] [2020-10-13 10:02:52,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:02:52,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:02:52,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343439380] [2020-10-13 10:02:52,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:02:52,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:02:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:02:52,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:02:52,737 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:03:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:03:18,742 INFO L93 Difference]: Finished difference Result 5095 states and 9566 transitions. [2020-10-13 10:03:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:03:18,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-13 10:03:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:03:18,784 INFO L225 Difference]: With dead ends: 5095 [2020-10-13 10:03:18,785 INFO L226 Difference]: Without dead ends: 3254 [2020-10-13 10:03:18,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:03:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2020-10-13 10:03:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 3208. [2020-10-13 10:03:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3208 states. [2020-10-13 10:03:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 5177 transitions. [2020-10-13 10:03:19,024 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 5177 transitions. Word has length 35 [2020-10-13 10:03:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:03:19,026 INFO L479 AbstractCegarLoop]: Abstraction has 3208 states and 5177 transitions. [2020-10-13 10:03:19,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:03:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 5177 transitions. [2020-10-13 10:03:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 10:03:19,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:03:19,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:03:19,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:03:19,037 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:03:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:03:19,038 INFO L82 PathProgramCache]: Analyzing trace with hash 751787998, now seen corresponding path program 1 times [2020-10-13 10:03:19,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:03:19,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608864634] [2020-10-13 10:03:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:03:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:19,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:19,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:20,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:20,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:20,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 10:03:20,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:03:20,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1680 [2020-10-13 10:03:20,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:20,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:03:20,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 10:03:20,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:03:20,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:03:20,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:03:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:20,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:20,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:03:20,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:20,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:03:20,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:20,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:03:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:03:20,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:03:20,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:03:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:20,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:21,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:21,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:03:21,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:21,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 10:03:21,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:03:21,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:03:21,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608864634] [2020-10-13 10:03:21,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:03:21,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:03:21,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746645747] [2020-10-13 10:03:21,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:03:21,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:03:21,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:03:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:03:21,150 INFO L87 Difference]: Start difference. First operand 3208 states and 5177 transitions. Second operand 5 states. [2020-10-13 10:03:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:03:54,286 INFO L93 Difference]: Finished difference Result 7912 states and 13254 transitions. [2020-10-13 10:03:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:03:54,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-10-13 10:03:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:03:54,314 INFO L225 Difference]: With dead ends: 7912 [2020-10-13 10:03:54,314 INFO L226 Difference]: Without dead ends: 4710 [2020-10-13 10:03:54,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:03:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2020-10-13 10:03:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 4664. [2020-10-13 10:03:54,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4664 states. [2020-10-13 10:03:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 7160 transitions. [2020-10-13 10:03:54,450 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 7160 transitions. Word has length 110 [2020-10-13 10:03:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:03:54,451 INFO L479 AbstractCegarLoop]: Abstraction has 4664 states and 7160 transitions. [2020-10-13 10:03:54,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:03:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 7160 transitions. [2020-10-13 10:03:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 10:03:54,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:03:54,455 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:03:54,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:03:54,455 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:03:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:03:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash -888070640, now seen corresponding path program 1 times [2020-10-13 10:03:54,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:03:54,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599044231] [2020-10-13 10:03:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:03:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:54,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:54,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:55,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:55,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:03:55,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:03:55,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-13 10:03:55,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:03:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 10:03:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:03:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:55,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:03:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:55,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:55,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:55,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:03:55,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:55,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:03:55,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:55,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:03:55,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:55,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:03:55,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:55,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:03:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:55,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:55,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:55,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:03:55,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:55,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-13 10:03:55,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:55,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:55,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:55,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:03:55,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:03:55,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599044231] [2020-10-13 10:03:55,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:03:55,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:03:55,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102402293] [2020-10-13 10:03:55,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:03:55,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:03:55,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:03:55,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:03:55,569 INFO L87 Difference]: Start difference. First operand 4664 states and 7160 transitions. Second operand 5 states. [2020-10-13 10:04:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:04:34,256 INFO L93 Difference]: Finished difference Result 13562 states and 21071 transitions. [2020-10-13 10:04:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:04:34,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-13 10:04:34,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:04:34,300 INFO L225 Difference]: With dead ends: 13562 [2020-10-13 10:04:34,300 INFO L226 Difference]: Without dead ends: 8904 [2020-10-13 10:04:34,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:04:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8904 states. [2020-10-13 10:04:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8904 to 8898. [2020-10-13 10:04:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8898 states. [2020-10-13 10:04:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8898 states to 8898 states and 12085 transitions. [2020-10-13 10:04:34,547 INFO L78 Accepts]: Start accepts. Automaton has 8898 states and 12085 transitions. Word has length 111 [2020-10-13 10:04:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:04:34,548 INFO L479 AbstractCegarLoop]: Abstraction has 8898 states and 12085 transitions. [2020-10-13 10:04:34,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:04:34,548 INFO L276 IsEmpty]: Start isEmpty. Operand 8898 states and 12085 transitions. [2020-10-13 10:04:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 10:04:34,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:04:34,562 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:04:34,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:04:34,563 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:04:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:04:34,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1098665088, now seen corresponding path program 1 times [2020-10-13 10:04:34,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:04:34,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498165965] [2020-10-13 10:04:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:04:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:34,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:34,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:35,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:36,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:36,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 10:04:36,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:04:36,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1455 [2020-10-13 10:04:36,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:36,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:04:36,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 10:04:36,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:04:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:04:36,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:04:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:36,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:36,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:36,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:04:36,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:36,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:04:36,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:36,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:04:36,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:36,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:04:36,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:04:36,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:04:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:36,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:36,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:36,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:04:36,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:36,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-13 10:04:36,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:04:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:04:36,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:04:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:04:36,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498165965] [2020-10-13 10:04:36,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:04:36,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:04:36,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941486163] [2020-10-13 10:04:36,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:04:36,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:04:36,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:04:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:04:36,647 INFO L87 Difference]: Start difference. First operand 8898 states and 12085 transitions. Second operand 5 states. [2020-10-13 10:05:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:05:17,833 INFO L93 Difference]: Finished difference Result 17812 states and 24206 transitions. [2020-10-13 10:05:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:05:17,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2020-10-13 10:05:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:05:17,890 INFO L225 Difference]: With dead ends: 17812 [2020-10-13 10:05:17,893 INFO L226 Difference]: Without dead ends: 8902 [2020-10-13 10:05:17,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:05:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8902 states. [2020-10-13 10:05:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8902 to 8898. [2020-10-13 10:05:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8898 states. [2020-10-13 10:05:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8898 states to 8898 states and 12081 transitions. [2020-10-13 10:05:18,142 INFO L78 Accepts]: Start accepts. Automaton has 8898 states and 12081 transitions. Word has length 136 [2020-10-13 10:05:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:05:18,142 INFO L479 AbstractCegarLoop]: Abstraction has 8898 states and 12081 transitions. [2020-10-13 10:05:18,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:05:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 8898 states and 12081 transitions. [2020-10-13 10:05:18,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 10:05:18,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:05:18,146 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:05:18,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:05:18,146 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:05:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:05:18,147 INFO L82 PathProgramCache]: Analyzing trace with hash 792639026, now seen corresponding path program 1 times [2020-10-13 10:05:18,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:05:18,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466406133] [2020-10-13 10:05:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:05:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:18,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:18,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:18,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:19,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:19,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 10:05:19,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:05:19,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1471 [2020-10-13 10:05:19,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:19,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:05:19,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-13 10:05:19,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:05:19,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:19,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:05:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:19,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:19,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:19,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:05:19,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:19,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:05:19,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:19,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:05:19,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:19,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:05:19,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:20,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:05:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:20,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:20,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:20,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:05:20,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:20,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-13 10:05:20,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:20,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:05:20,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:20,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 10:05:20,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:05:20,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466406133] [2020-10-13 10:05:20,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:05:20,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:05:20,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018759832] [2020-10-13 10:05:20,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:05:20,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:05:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:05:20,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:05:20,441 INFO L87 Difference]: Start difference. First operand 8898 states and 12081 transitions. Second operand 6 states. [2020-10-13 10:06:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:06:07,887 INFO L93 Difference]: Finished difference Result 17839 states and 24234 transitions. [2020-10-13 10:06:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:06:07,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2020-10-13 10:06:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:06:07,936 INFO L225 Difference]: With dead ends: 17839 [2020-10-13 10:06:07,937 INFO L226 Difference]: Without dead ends: 8902 [2020-10-13 10:06:07,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:06:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8902 states. [2020-10-13 10:06:08,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8902 to 8898. [2020-10-13 10:06:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8898 states. [2020-10-13 10:06:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8898 states to 8898 states and 12053 transitions. [2020-10-13 10:06:08,189 INFO L78 Accepts]: Start accepts. Automaton has 8898 states and 12053 transitions. Word has length 137 [2020-10-13 10:06:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:06:08,190 INFO L479 AbstractCegarLoop]: Abstraction has 8898 states and 12053 transitions. [2020-10-13 10:06:08,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:06:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 8898 states and 12053 transitions. [2020-10-13 10:06:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 10:06:08,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:06:08,194 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:06:08,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:06:08,194 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:06:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:06:08,195 INFO L82 PathProgramCache]: Analyzing trace with hash 754632206, now seen corresponding path program 1 times [2020-10-13 10:06:08,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:06:08,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117318805] [2020-10-13 10:06:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:06:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:08,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:08,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:08,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:09,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:09,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 10:06:09,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:06:09,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1341 [2020-10-13 10:06:09,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:09,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:06:09,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-13 10:06:09,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:06:09,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:06:09,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:06:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:09,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:09,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:09,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:06:09,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:09,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:06:09,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:09,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:06:09,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:06:09,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:06:09,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:06:09,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:06:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:09,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:10,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:10,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 10:06:10,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:10,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-13 10:06:10,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:10,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:06:10,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:06:10,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-13 10:06:10,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:06:10,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117318805] [2020-10-13 10:06:10,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:06:10,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:06:10,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254890218] [2020-10-13 10:06:10,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:06:10,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:06:10,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:06:10,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:06:10,199 INFO L87 Difference]: Start difference. First operand 8898 states and 12053 transitions. Second operand 5 states.