/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:07:47,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:07:47,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:07:47,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:07:47,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:07:47,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:07:47,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:07:47,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:07:47,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:07:47,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:07:47,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:07:47,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:07:47,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:07:47,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:07:47,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:07:47,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:07:47,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:07:47,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:07:47,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:07:47,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:07:47,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:07:47,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:07:47,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:07:47,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:07:47,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:07:47,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:07:47,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:07:47,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:07:47,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:07:47,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:07:47,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:07:47,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:07:47,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:07:47,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:07:47,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:07:47,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:07:47,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:07:47,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:07:47,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:07:47,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:07:47,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:07:47,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 10:07:47,897 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:07:47,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:07:47,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:07:47,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:07:47,900 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:07:47,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:07:47,901 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:07:47,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:07:47,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:07:47,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:07:47,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:07:47,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:07:47,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:07:47,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:07:47,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:07:47,904 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:07:47,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:07:47,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:07:47,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:07:47,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:07:47,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:07:47,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:07:47,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:07:47,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:07:47,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:07:47,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:07:47,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:07:47,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:07:47,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:07:47,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:07:48,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:07:48,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:07:48,359 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:07:48,361 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:07:48,362 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:07:48,363 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2020-09-25 10:07:48,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92ffe5c6b/b588634f8843436599c6a0bc82d4d129/FLAGa647690b4 [2020-09-25 10:07:49,091 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:07:49,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2020-09-25 10:07:49,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92ffe5c6b/b588634f8843436599c6a0bc82d4d129/FLAGa647690b4 [2020-09-25 10:07:49,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92ffe5c6b/b588634f8843436599c6a0bc82d4d129 [2020-09-25 10:07:49,309 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:07:49,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:07:49,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:07:49,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:07:49,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:07:49,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:07:49" (1/1) ... [2020-09-25 10:07:49,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:49, skipping insertion in model container [2020-09-25 10:07:49,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:07:49" (1/1) ... [2020-09-25 10:07:49,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:07:49,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:07:49,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:07:49,852 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:07:50,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:07:50,174 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:07:50,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:50 WrapperNode [2020-09-25 10:07:50,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:07:50,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:07:50,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:07:50,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:07:50,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:50" (1/1) ... [2020-09-25 10:07:50,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:50" (1/1) ... [2020-09-25 10:07:50,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:50" (1/1) ... [2020-09-25 10:07:50,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:50" (1/1) ... [2020-09-25 10:07:50,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:50" (1/1) ... [2020-09-25 10:07:50,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:50" (1/1) ... [2020-09-25 10:07:50,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:50" (1/1) ... [2020-09-25 10:07:50,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:07:50,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:07:50,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:07:50,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:07:50,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:07:50,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:07:50,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:07:50,415 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 10:07:50,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:07:50,415 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 10:07:50,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:07:50,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:07:50,416 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 10:07:50,416 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:07:50,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:07:50,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:07:51,718 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:07:51,718 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 10:07:51,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:07:51 BoogieIcfgContainer [2020-09-25 10:07:51,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:07:51,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:07:51,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:07:51,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:07:51,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:07:49" (1/3) ... [2020-09-25 10:07:51,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9e9bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:07:51, skipping insertion in model container [2020-09-25 10:07:51,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:07:50" (2/3) ... [2020-09-25 10:07:51,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9e9bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:07:51, skipping insertion in model container [2020-09-25 10:07:51,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:07:51" (3/3) ... [2020-09-25 10:07:51,745 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label56.c [2020-09-25 10:07:51,755 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:07:51,768 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:07:51,790 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:07:51,823 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:07:51,823 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:07:51,823 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:07:51,823 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:07:51,824 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:07:51,824 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:07:51,824 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:07:51,824 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:07:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 10:07:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 10:07:51,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:07:51,887 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:07:51,888 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:07:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:07:51,896 INFO L82 PathProgramCache]: Analyzing trace with hash 602782831, now seen corresponding path program 1 times [2020-09-25 10:07:51,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:07:51,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251981973] [2020-09-25 10:07:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:07:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:52,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:52,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:53,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:54,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:54,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:55,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:56,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:57,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:57,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-25 10:07:57,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:07:57,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 10:07:57,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:57,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:07:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 10:07:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-25 10:07:57,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 10:07:57,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:07:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:57,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:57,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:07:57,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:07:57,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:07:57,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 10:07:57,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:07:57,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:07:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:07:57,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:07:57,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 10:07:57,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:07:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:07:57,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251981973] [2020-09-25 10:07:57,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:07:57,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:07:57,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395795482] [2020-09-25 10:07:57,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:07:57,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:07:57,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:07:57,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:07:57,597 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 10:07:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:07:59,523 INFO L93 Difference]: Finished difference Result 1268 states and 1667 transitions. [2020-09-25 10:07:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:07:59,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2020-09-25 10:07:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:07:59,549 INFO L225 Difference]: With dead ends: 1268 [2020-09-25 10:07:59,550 INFO L226 Difference]: Without dead ends: 694 [2020-09-25 10:07:59,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:07:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-09-25 10:07:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 603. [2020-09-25 10:07:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 10:07:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 10:07:59,667 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 104 [2020-09-25 10:07:59,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:07:59,668 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 10:07:59,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:07:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 10:07:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-09-25 10:07:59,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:07:59,676 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-09-25 10:07:59,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:07:59,677 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:07:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:07:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash -435684201, now seen corresponding path program 1 times [2020-09-25 10:07:59,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:07:59,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673119279] [2020-09-25 10:07:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:07:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:07:59,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:07:59,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:00,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:00,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:03,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:03,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:04,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:04,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:04,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:04,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-09-25 10:08:04,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:08:04,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 10:08:04,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:04,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:04,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:08:04,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 10:08:04,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-25 10:08:04,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:04,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:04,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:04,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:04,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:08:04,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:04,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-25 10:08:04,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:04,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:08:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:04,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:08:04,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:04,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:08:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:04,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:04,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:05,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:05,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 10:08:05,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:08:05,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 10:08:05,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:05,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:08:05,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 10:08:05,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 10:08:05,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673119279] [2020-09-25 10:08:05,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:05,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 10:08:05,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328657356] [2020-09-25 10:08:05,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 10:08:05,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 10:08:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:08:05,052 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 6 states. [2020-09-25 10:08:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:06,992 INFO L93 Difference]: Finished difference Result 1531 states and 1922 transitions. [2020-09-25 10:08:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 10:08:06,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2020-09-25 10:08:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:07,000 INFO L225 Difference]: With dead ends: 1531 [2020-09-25 10:08:07,000 INFO L226 Difference]: Without dead ends: 952 [2020-09-25 10:08:07,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 10:08:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-09-25 10:08:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 897. [2020-09-25 10:08:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-09-25 10:08:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1106 transitions. [2020-09-25 10:08:07,051 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1106 transitions. Word has length 125 [2020-09-25 10:08:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:07,052 INFO L479 AbstractCegarLoop]: Abstraction has 897 states and 1106 transitions. [2020-09-25 10:08:07,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 10:08:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1106 transitions. [2020-09-25 10:08:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-25 10:08:07,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:07,061 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-09-25 10:08:07,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:08:07,061 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash 305762680, now seen corresponding path program 1 times [2020-09-25 10:08:07,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:07,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171001260] [2020-09-25 10:08:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:07,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:07,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:07,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:07,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:07,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:07,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:07,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:07,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:12,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:12,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-25 10:08:12,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:08:12,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 10:08:12,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:12,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:12,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:12,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 10:08:12,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-25 10:08:12,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:12,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:12,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:12,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:12,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:08:12,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:12,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 10:08:12,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:12,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:12,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:08:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:08:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:08:12,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:08:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:12,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:12,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:12,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 10:08:12,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:12,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 10:08:12,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:12,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:12,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:08:12,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:12,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 10:08:12,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:08:12,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171001260] [2020-09-25 10:08:12,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:12,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 10:08:12,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125084829] [2020-09-25 10:08:12,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:08:12,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:12,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:08:12,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:08:12,358 INFO L87 Difference]: Start difference. First operand 897 states and 1106 transitions. Second operand 5 states. [2020-09-25 10:08:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:14,446 INFO L93 Difference]: Finished difference Result 2388 states and 3059 transitions. [2020-09-25 10:08:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 10:08:14,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-09-25 10:08:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:14,465 INFO L225 Difference]: With dead ends: 2388 [2020-09-25 10:08:14,465 INFO L226 Difference]: Without dead ends: 1515 [2020-09-25 10:08:14,469 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 [2020-09-25 10:08:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-09-25 10:08:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1469. [2020-09-25 10:08:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2020-09-25 10:08:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1842 transitions. [2020-09-25 10:08:14,542 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1842 transitions. Word has length 134 [2020-09-25 10:08:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:14,544 INFO L479 AbstractCegarLoop]: Abstraction has 1469 states and 1842 transitions. [2020-09-25 10:08:14,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:08:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1842 transitions. [2020-09-25 10:08:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-25 10:08:14,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:14,555 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-09-25 10:08:14,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:08:14,565 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:14,565 INFO L82 PathProgramCache]: Analyzing trace with hash -588171755, now seen corresponding path program 1 times [2020-09-25 10:08:14,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:14,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529457020] [2020-09-25 10:08:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:14,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:14,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:16,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:16,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-09-25 10:08:16,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:08:16,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1872 [2020-09-25 10:08:16,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:16,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:08:16,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 10:08:16,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-25 10:08:16,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:16,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:16,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:16,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:16,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:08:16,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 10:08:16,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:16,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:08:16,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:16,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 10:08:16,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:16,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:08:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:16,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:16,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:16,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:16,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 10:08:16,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:08:16,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 10:08:16,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:16,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:08:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 10:08:16,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:16,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 10:08:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:16,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:16,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 10:08:16,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-25 10:08:16,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:16,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:16,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:08:16,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 10:08:16,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:08:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 10:08:16,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529457020] [2020-09-25 10:08:16,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:16,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 10:08:16,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343136352] [2020-09-25 10:08:16,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 10:08:16,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:16,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 10:08:16,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:08:16,896 INFO L87 Difference]: Start difference. First operand 1469 states and 1842 transitions. Second operand 7 states. [2020-09-25 10:08:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:18,850 INFO L93 Difference]: Finished difference Result 3084 states and 3927 transitions. [2020-09-25 10:08:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 10:08:18,851 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2020-09-25 10:08:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:18,862 INFO L225 Difference]: With dead ends: 3084 [2020-09-25 10:08:18,862 INFO L226 Difference]: Without dead ends: 1780 [2020-09-25 10:08:18,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:08:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2020-09-25 10:08:18,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1473. [2020-09-25 10:08:18,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1473 states. [2020-09-25 10:08:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 1827 transitions. [2020-09-25 10:08:18,920 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 1827 transitions. Word has length 181 [2020-09-25 10:08:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:18,921 INFO L479 AbstractCegarLoop]: Abstraction has 1473 states and 1827 transitions. [2020-09-25 10:08:18,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 10:08:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 1827 transitions. [2020-09-25 10:08:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-09-25 10:08:18,928 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:18,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-09-25 10:08:18,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:08:18,929 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1707194346, now seen corresponding path program 1 times [2020-09-25 10:08:18,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:18,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483392903] [2020-09-25 10:08:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:19,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:19,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:19,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:19,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:19,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:19,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:19,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:23,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:23,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-09-25 10:08:23,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:08:23,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4530 [2020-09-25 10:08:23,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:23,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:23,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 10:08:23,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 10:08:23,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 10:08:23,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:23,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:23,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:23,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:23,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:08:23,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:23,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 10:08:23,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:23,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:08:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:08:23,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:23,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:08:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:23,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:23,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:23,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 10:08:23,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:23,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-25 10:08:23,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:23,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:08:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 10:08:23,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:23,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 10:08:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:23,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:23,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:23,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 10:08:23,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:23,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 10:08:23,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:23,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:23,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:08:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-09-25 10:08:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:08:23,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 10:08:23,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483392903] [2020-09-25 10:08:23,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:23,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 10:08:23,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724534451] [2020-09-25 10:08:23,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 10:08:23,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:23,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 10:08:23,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 10:08:23,943 INFO L87 Difference]: Start difference. First operand 1473 states and 1827 transitions. Second operand 8 states. [2020-09-25 10:08:24,651 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-09-25 10:08:26,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:26,998 INFO L93 Difference]: Finished difference Result 3293 states and 4090 transitions. [2020-09-25 10:08:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 10:08:26,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 188 [2020-09-25 10:08:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:27,009 INFO L225 Difference]: With dead ends: 3293 [2020-09-25 10:08:27,010 INFO L226 Difference]: Without dead ends: 1844 [2020-09-25 10:08:27,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-25 10:08:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-09-25 10:08:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1789. [2020-09-25 10:08:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1789 states. [2020-09-25 10:08:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 2201 transitions. [2020-09-25 10:08:27,079 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 2201 transitions. Word has length 188 [2020-09-25 10:08:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:27,079 INFO L479 AbstractCegarLoop]: Abstraction has 1789 states and 2201 transitions. [2020-09-25 10:08:27,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 10:08:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 2201 transitions. [2020-09-25 10:08:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-25 10:08:27,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:27,088 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-09-25 10:08:27,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:08:27,089 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1102012595, now seen corresponding path program 1 times [2020-09-25 10:08:27,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:27,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424227812] [2020-09-25 10:08:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:27,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:27,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:27,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:27,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:27,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:27,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:32,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:32,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-09-25 10:08:32,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:08:32,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 10:08:32,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:32,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:32,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:08:32,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 10:08:32,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 10:08:32,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:32,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:32,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:32,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:32,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:08:32,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:32,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 10:08:32,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:32,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:32,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:08:32,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:32,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 10:08:32,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:32,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:08:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:32,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:32,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:32,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:32,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:08:32,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:08:32,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 10:08:32,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:32,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:32,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:32,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:08:32,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 10:08:32,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:32,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-25 10:08:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:32,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:32,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:32,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 10:08:32,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:32,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-25 10:08:32,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:32,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:32,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:32,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:08:32,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 10:08:32,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:32,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-25 10:08:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:32,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:32,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:32,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 10:08:32,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:32,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-25 10:08:32,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:32,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:32,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:08:32,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-09-25 10:08:32,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:08:32,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 82 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-25 10:08:32,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424227812] [2020-09-25 10:08:32,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:32,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 10:08:32,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570881589] [2020-09-25 10:08:32,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 10:08:32,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 10:08:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:08:32,856 INFO L87 Difference]: Start difference. First operand 1789 states and 2201 transitions. Second operand 10 states. [2020-09-25 10:08:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:36,717 INFO L93 Difference]: Finished difference Result 4038 states and 4981 transitions. [2020-09-25 10:08:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 10:08:36,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 205 [2020-09-25 10:08:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:36,731 INFO L225 Difference]: With dead ends: 4038 [2020-09-25 10:08:36,731 INFO L226 Difference]: Without dead ends: 2414 [2020-09-25 10:08:36,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2020-09-25 10:08:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2020-09-25 10:08:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2146. [2020-09-25 10:08:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2020-09-25 10:08:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 2630 transitions. [2020-09-25 10:08:36,794 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 2630 transitions. Word has length 205 [2020-09-25 10:08:36,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:36,795 INFO L479 AbstractCegarLoop]: Abstraction has 2146 states and 2630 transitions. [2020-09-25 10:08:36,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 10:08:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 2630 transitions. [2020-09-25 10:08:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-25 10:08:36,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:36,804 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-09-25 10:08:36,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 10:08:36,805 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1517034315, now seen corresponding path program 1 times [2020-09-25 10:08:36,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:36,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271310979] [2020-09-25 10:08:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:36,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:36,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:37,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking...