/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:01:54,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:01:54,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:01:54,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:01:54,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:01:54,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:01:54,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:01:54,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:01:54,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:01:54,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:01:54,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:01:54,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:01:54,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:01:54,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:01:54,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:01:54,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:01:54,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:01:54,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:01:54,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:01:54,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:01:54,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:01:54,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:01:54,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:01:54,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:01:54,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:01:54,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:01:54,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:01:54,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:01:54,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:01:54,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:01:54,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:01:54,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:01:54,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:01:54,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:01:54,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:01:54,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:01:54,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:01:54,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:01:54,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:01:54,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:01:54,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:01:54,818 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 [2020-10-27 18:01:54,845 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:01:54,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:01:54,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:01:54,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:01:54,848 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:01:54,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:01:54,848 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:01:54,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:01:54,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:01:54,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:01:54,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:01:54,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:01:54,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:01:54,850 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:01:54,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:01:54,850 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:01:54,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:01:54,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:01:54,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:01:54,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:01:54,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:01:54,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:01:54,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:01:54,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:01:54,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:01:54,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:01:54,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:01:54,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:01:54,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:01:54,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:01:55,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:01:55,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:01:55,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:01:55,323 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:01:55,324 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:01:55,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label33.c [2020-10-27 18:01:55,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9b296f48/60d827a9379a450d82a5d45da5e9bc8b/FLAG81f0af8d4 [2020-10-27 18:01:56,657 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:01:56,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label33.c [2020-10-27 18:01:56,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9b296f48/60d827a9379a450d82a5d45da5e9bc8b/FLAG81f0af8d4 [2020-10-27 18:01:56,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9b296f48/60d827a9379a450d82a5d45da5e9bc8b [2020-10-27 18:01:56,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:01:56,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:01:56,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:01:56,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:01:56,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:01:56,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:01:56" (1/1) ... [2020-10-27 18:01:57,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e943c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:01:56, skipping insertion in model container [2020-10-27 18:01:57,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:01:56" (1/1) ... [2020-10-27 18:01:57,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:01:57,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:01:59,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:01:59,060 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:02:00,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:02:00,056 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:02:00,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00 WrapperNode [2020-10-27 18:02:00,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:02:00,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:02:00,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:02:00,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:02:00,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00" (1/1) ... [2020-10-27 18:02:00,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00" (1/1) ... [2020-10-27 18:02:00,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00" (1/1) ... [2020-10-27 18:02:00,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00" (1/1) ... [2020-10-27 18:02:00,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00" (1/1) ... [2020-10-27 18:02:00,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00" (1/1) ... [2020-10-27 18:02:00,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00" (1/1) ... [2020-10-27 18:02:00,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:02:00,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:02:00,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:02:00,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:02:00,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:02:00,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:02:00,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:02:00,748 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:02:00,749 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:02:00,749 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:02:00,749 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 18:02:00,750 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 18:02:00,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:02:00,751 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:02:00,751 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:02:00,752 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 18:02:00,752 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 18:02:00,752 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:02:00,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:02:00,752 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:02:00,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:02:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:02:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:02:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:02:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:02:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:02:00,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:02:00,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:02:00,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:02:00,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:02:11,175 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:02:11,175 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:02:11,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:02:11 BoogieIcfgContainer [2020-10-27 18:02:11,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:02:11,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:02:11,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:02:11,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:02:11,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:01:56" (1/3) ... [2020-10-27 18:02:11,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b569303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:02:11, skipping insertion in model container [2020-10-27 18:02:11,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00" (2/3) ... [2020-10-27 18:02:11,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b569303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:02:11, skipping insertion in model container [2020-10-27 18:02:11,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:02:11" (3/3) ... [2020-10-27 18:02:11,197 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label33.c [2020-10-27 18:02:11,212 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:02:11,220 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:02:11,237 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:02:11,303 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:02:11,303 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:02:11,303 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:02:11,303 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:02:11,304 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:02:11,304 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:02:11,304 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:02:11,304 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:02:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 18:02:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 18:02:11,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:02:11,370 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] [2020-10-27 18:02:11,370 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:02:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:02:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash 688373194, now seen corresponding path program 1 times [2020-10-27 18:02:11,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:02:11,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622370245] [2020-10-27 18:02:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:02:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:11,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:12,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:12,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 18:02:12,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:12,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-27 18:02:12,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:12,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:02:12,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:02:12,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:02:12,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:02:12,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:12,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:12,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:12,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:12,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:12,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 18:02:12,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:12,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:12,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:12,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:02:12,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:02:12,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622370245] [2020-10-27 18:02:12,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:02:12,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:02:12,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988702063] [2020-10-27 18:02:12,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:02:12,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:02:12,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:02:12,606 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 18:02:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:02:29,876 INFO L93 Difference]: Finished difference Result 3112 states and 5735 transitions. [2020-10-27 18:02:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:02:29,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-27 18:02:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:02:29,927 INFO L225 Difference]: With dead ends: 3112 [2020-10-27 18:02:29,927 INFO L226 Difference]: Without dead ends: 1904 [2020-10-27 18:02:29,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:02:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-10-27 18:02:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1884. [2020-10-27 18:02:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-10-27 18:02:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2891 transitions. [2020-10-27 18:02:30,141 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2891 transitions. Word has length 42 [2020-10-27 18:02:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:02:30,142 INFO L481 AbstractCegarLoop]: Abstraction has 1884 states and 2891 transitions. [2020-10-27 18:02:30,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:02:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2891 transitions. [2020-10-27 18:02:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 18:02:30,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:02:30,154 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, 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] [2020-10-27 18:02:30,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:02:30,155 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:02:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:02:30,157 INFO L82 PathProgramCache]: Analyzing trace with hash 592186030, now seen corresponding path program 1 times [2020-10-27 18:02:30,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:02:30,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462768960] [2020-10-27 18:02:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:02:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:30,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:30,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:31,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:32,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:32,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 18:02:32,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:02:32,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2081 [2020-10-27 18:02:32,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:02:32,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 18:02:32,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 18:02:32,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:02:32,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:32,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:32,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:32,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:32,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 18:02:32,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:32,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:32,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:32,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:32,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 18:02:32,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:02:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:32,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:32,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:32,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:02:32,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:32,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 18:02:32,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:32,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:32,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:32,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:02:32,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:02:32,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462768960] [2020-10-27 18:02:32,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:02:32,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:02:32,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524400490] [2020-10-27 18:02:32,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:02:32,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:32,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:02:32,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:02:32,840 INFO L87 Difference]: Start difference. First operand 1884 states and 2891 transitions. Second operand 5 states. [2020-10-27 18:02:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:02:54,891 INFO L93 Difference]: Finished difference Result 5463 states and 8425 transitions. [2020-10-27 18:02:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:02:54,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-27 18:02:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:02:54,915 INFO L225 Difference]: With dead ends: 5463 [2020-10-27 18:02:54,915 INFO L226 Difference]: Without dead ends: 3585 [2020-10-27 18:02:54,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:02:54,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2020-10-27 18:02:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3564. [2020-10-27 18:02:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3564 states. [2020-10-27 18:02:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 4831 transitions. [2020-10-27 18:02:55,038 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 4831 transitions. Word has length 111 [2020-10-27 18:02:55,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:02:55,039 INFO L481 AbstractCegarLoop]: Abstraction has 3564 states and 4831 transitions. [2020-10-27 18:02:55,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:02:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 4831 transitions. [2020-10-27 18:02:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 18:02:55,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:02:55,044 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, 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] [2020-10-27 18:02:55,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:02:55,044 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:02:55,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:02:55,045 INFO L82 PathProgramCache]: Analyzing trace with hash -872855259, now seen corresponding path program 1 times [2020-10-27 18:02:55,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:02:55,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919414753] [2020-10-27 18:02:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:02:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:55,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:55,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:56,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:56,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:02:56,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:02:56,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 949 [2020-10-27 18:02:56,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:02:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 18:02:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 18:02:56,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:56,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:56,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:56,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:56,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:56,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:56,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:02:56,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:56,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:56,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:56,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:56,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:02:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:56,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:56,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:56,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:02:56,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:56,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 18:02:56,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:56,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:56,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:56,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:02:56,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:02:56,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919414753] [2020-10-27 18:02:56,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:02:56,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:02:56,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035240197] [2020-10-27 18:02:56,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:02:56,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:56,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:02:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:02:56,478 INFO L87 Difference]: Start difference. First operand 3564 states and 4831 transitions. Second operand 6 states. [2020-10-27 18:03:25,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:03:25,224 INFO L93 Difference]: Finished difference Result 10436 states and 14925 transitions. [2020-10-27 18:03:25,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:03:25,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2020-10-27 18:03:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:03:25,279 INFO L225 Difference]: With dead ends: 10436 [2020-10-27 18:03:25,279 INFO L226 Difference]: Without dead ends: 6878 [2020-10-27 18:03:25,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:03:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6878 states. [2020-10-27 18:03:25,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6878 to 6860. [2020-10-27 18:03:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6860 states. [2020-10-27 18:03:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6860 states to 6860 states and 9204 transitions. [2020-10-27 18:03:25,553 INFO L78 Accepts]: Start accepts. Automaton has 6860 states and 9204 transitions. Word has length 118 [2020-10-27 18:03:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:03:25,554 INFO L481 AbstractCegarLoop]: Abstraction has 6860 states and 9204 transitions. [2020-10-27 18:03:25,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:03:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6860 states and 9204 transitions. [2020-10-27 18:03:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 18:03:25,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:03:25,561 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, 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] [2020-10-27 18:03:25,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:03:25,561 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:03:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:03:25,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1099173374, now seen corresponding path program 1 times [2020-10-27 18:03:25,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:03:25,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222711431] [2020-10-27 18:03:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:03:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:25,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:26,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:27,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:27,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 18:03:27,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:03:27,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1485 [2020-10-27 18:03:27,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:03:27,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-27 18:03:27,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 18:03:27,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:27,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:03:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:27,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:27,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:27,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:03:27,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:27,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:03:27,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:03:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:03:27,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:27,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:03:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:27,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:27,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:27,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 18:03:27,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:27,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 18:03:27,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:03:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 18:03:27,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:03:27,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222711431] [2020-10-27 18:03:27,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:03:27,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:03:27,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406325087] [2020-10-27 18:03:27,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:03:27,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:03:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:03:27,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:03:27,576 INFO L87 Difference]: Start difference. First operand 6860 states and 9204 transitions. Second operand 5 states. [2020-10-27 18:03:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:03:53,170 INFO L93 Difference]: Finished difference Result 20216 states and 27601 transitions. [2020-10-27 18:03:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:03:53,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-10-27 18:03:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:03:53,283 INFO L225 Difference]: With dead ends: 20216 [2020-10-27 18:03:53,284 INFO L226 Difference]: Without dead ends: 13362 [2020-10-27 18:03:53,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:03:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13362 states. [2020-10-27 18:03:53,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13362 to 13353. [2020-10-27 18:03:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13353 states. [2020-10-27 18:03:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13353 states to 13353 states and 17263 transitions. [2020-10-27 18:03:53,829 INFO L78 Accepts]: Start accepts. Automaton has 13353 states and 17263 transitions. Word has length 151 [2020-10-27 18:03:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:03:53,831 INFO L481 AbstractCegarLoop]: Abstraction has 13353 states and 17263 transitions. [2020-10-27 18:03:53,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:03:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 13353 states and 17263 transitions. [2020-10-27 18:03:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-27 18:03:53,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:03:53,839 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-27 18:03:53,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:03:53,840 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:03:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:03:53,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1035967894, now seen corresponding path program 1 times [2020-10-27 18:03:53,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:03:53,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928950037] [2020-10-27 18:03:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:03:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:53,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:54,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:55,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:55,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:56,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:58,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:58,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-27 18:03:58,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:03:58,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 18:03:58,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:03:58,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 18:03:58,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 18:03:58,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:03:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:59,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:59,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:59,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:03:59,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:59,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:03:59,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:03:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:03:59,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:59,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:03:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:59,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:59,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:59,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:03:59,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:59,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 18:03:59,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:59,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:03:59,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:59,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:03:59,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:59,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-27 18:03:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:59,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:59,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:59,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 18:03:59,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:59,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 18:03:59,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:59,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:03:59,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:59,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 18:03:59,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 18:03:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 18:03:59,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928950037] [2020-10-27 18:03:59,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:03:59,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:03:59,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834973156] [2020-10-27 18:03:59,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:03:59,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:03:59,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:03:59,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:03:59,484 INFO L87 Difference]: Start difference. First operand 13353 states and 17263 transitions. Second operand 5 states. [2020-10-27 18:04:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:04:24,985 INFO L93 Difference]: Finished difference Result 36454 states and 48673 transitions. [2020-10-27 18:04:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:04:24,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2020-10-27 18:04:24,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:04:25,106 INFO L225 Difference]: With dead ends: 36454 [2020-10-27 18:04:25,107 INFO L226 Difference]: Without dead ends: 23107 [2020-10-27 18:04:25,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:04:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23107 states. [2020-10-27 18:04:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23107 to 23097. [2020-10-27 18:04:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23097 states. [2020-10-27 18:04:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23097 states to 23097 states and 29302 transitions. [2020-10-27 18:04:26,084 INFO L78 Accepts]: Start accepts. Automaton has 23097 states and 29302 transitions. Word has length 200 [2020-10-27 18:04:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:04:26,085 INFO L481 AbstractCegarLoop]: Abstraction has 23097 states and 29302 transitions. [2020-10-27 18:04:26,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:04:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 23097 states and 29302 transitions. [2020-10-27 18:04:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-27 18:04:26,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:04:26,096 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:04:26,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:04:26,098 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:04:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:04:26,099 INFO L82 PathProgramCache]: Analyzing trace with hash -875315434, now seen corresponding path program 1 times [2020-10-27 18:04:26,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:04:26,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501102808] [2020-10-27 18:04:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:04:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:26,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:28,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:28,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-27 18:04:28,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:04:28,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2440 [2020-10-27 18:04:28,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:28,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:04:28,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-27 18:04:28,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 18:04:28,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:28,891 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:04:28,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:04:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:28,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:28,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:28,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:04:28,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:28,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 18:04:28,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:04:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:04:28,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:28,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:04:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:29,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:29,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:29,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 18:04:29,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:29,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-27 18:04:29,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:04:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-27 18:04:29,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:04:29,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501102808] [2020-10-27 18:04:29,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:04:29,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:04:29,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480411349] [2020-10-27 18:04:29,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:04:29,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:04:29,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:04:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:04:29,505 INFO L87 Difference]: Start difference. First operand 23097 states and 29302 transitions. Second operand 5 states. [2020-10-27 18:04:29,719 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:05:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:05:02,614 INFO L93 Difference]: Finished difference Result 63344 states and 83608 transitions. [2020-10-27 18:05:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:05:02,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2020-10-27 18:05:02,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:05:02,787 INFO L225 Difference]: With dead ends: 63344 [2020-10-27 18:05:02,787 INFO L226 Difference]: Without dead ends: 40253 [2020-10-27 18:05:02,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:05:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40253 states. [2020-10-27 18:05:03,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40253 to 40165. [2020-10-27 18:05:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40165 states. [2020-10-27 18:05:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40165 states to 40165 states and 52188 transitions. [2020-10-27 18:05:03,982 INFO L78 Accepts]: Start accepts. Automaton has 40165 states and 52188 transitions. Word has length 222 [2020-10-27 18:05:03,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:05:03,982 INFO L481 AbstractCegarLoop]: Abstraction has 40165 states and 52188 transitions. [2020-10-27 18:05:03,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:05:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 40165 states and 52188 transitions. [2020-10-27 18:05:04,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-27 18:05:04,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:05:04,000 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:05:04,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:05:04,001 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:05:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:05:04,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1904169157, now seen corresponding path program 1 times [2020-10-27 18:05:04,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:05:04,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200671989] [2020-10-27 18:05:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:05:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:04,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:04,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:07,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:07,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-27 18:05:07,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:05:07,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3006 [2020-10-27 18:05:07,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:07,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:05:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 274 [2020-10-27 18:05:07,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 18:05:07,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:07,335 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:05:07,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:05:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:07,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:07,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:07,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:05:07,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:07,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:05:07,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:07,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:05:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:05:07,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:05:07,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:05:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:07,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:07,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:07,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-27 18:05:07,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:07,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-27 18:05:07,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:07,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:05:07,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:07,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 259 [2020-10-27 18:05:07,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:05:08,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200671989] [2020-10-27 18:05:08,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:05:08,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:05:08,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970691408] [2020-10-27 18:05:08,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:05:08,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:05:08,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:05:08,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:05:08,080 INFO L87 Difference]: Start difference. First operand 40165 states and 52188 transitions. Second operand 5 states. [2020-10-27 18:05:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:05:37,386 INFO L93 Difference]: Finished difference Result 92543 states and 128723 transitions. [2020-10-27 18:05:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:05:37,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 307 [2020-10-27 18:05:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:05:37,704 INFO L225 Difference]: With dead ends: 92543 [2020-10-27 18:05:37,705 INFO L226 Difference]: Without dead ends: 66152 [2020-10-27 18:05:37,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:05:37,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66152 states. [2020-10-27 18:05:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66152 to 66131. [2020-10-27 18:05:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66131 states. [2020-10-27 18:05:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66131 states to 66131 states and 88630 transitions. [2020-10-27 18:05:40,400 INFO L78 Accepts]: Start accepts. Automaton has 66131 states and 88630 transitions. Word has length 307 [2020-10-27 18:05:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:05:40,407 INFO L481 AbstractCegarLoop]: Abstraction has 66131 states and 88630 transitions. [2020-10-27 18:05:40,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:05:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 66131 states and 88630 transitions. [2020-10-27 18:05:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-27 18:05:40,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:05:40,483 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-27 18:05:40,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:05:40,484 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:05:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:05:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash 304977995, now seen corresponding path program 1 times [2020-10-27 18:05:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:05:40,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8887412] [2020-10-27 18:05:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:05:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:40,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:40,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:41,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:44,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking...