/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:06:00,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:06:00,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:06:00,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:06:00,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:06:00,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:06:00,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:06:00,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:06:00,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:06:00,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:06:00,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:06:00,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:06:00,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:06:00,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:06:00,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:06:00,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:06:00,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:06:00,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:06:00,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:06:00,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:06:00,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:06:00,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:06:00,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:06:00,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:06:00,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:06:00,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:06:00,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:06:00,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:06:00,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:06:00,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:06:00,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:06:00,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:06:00,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:06:00,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:06:00,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:06:00,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:06:00,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:06:00,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:06:00,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:06:00,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:06:00,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:06:00,194 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 [2020-10-14 09:06:00,226 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:06:00,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:06:00,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:06:00,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:06:00,228 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:06:00,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:06:00,228 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:06:00,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:06:00,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:06:00,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:06:00,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:06:00,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:06:00,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:06:00,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:06:00,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:06:00,231 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:06:00,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:06:00,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:06:00,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:06:00,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:06:00,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:06:00,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:06:00,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:06:00,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:06:00,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:06:00,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:06:00,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:06:00,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:06:00,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:06:00,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:06:00,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:06:00,572 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:06:00,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:06:00,577 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:06:00,578 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:06:00,579 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-14 09:06:00,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a80e65b9/a7162d957a0f44a7858fd3e4d32bbe35/FLAG0f0746af0 [2020-10-14 09:06:01,094 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:06:01,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-14 09:06:01,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a80e65b9/a7162d957a0f44a7858fd3e4d32bbe35/FLAG0f0746af0 [2020-10-14 09:06:01,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a80e65b9/a7162d957a0f44a7858fd3e4d32bbe35 [2020-10-14 09:06:01,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:06:01,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:06:01,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:06:01,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:06:01,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:06:01,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:06:01" (1/1) ... [2020-10-14 09:06:01,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f216bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:01, skipping insertion in model container [2020-10-14 09:06:01,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:06:01" (1/1) ... [2020-10-14 09:06:01,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:06:01,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:06:01,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:06:01,937 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:06:02,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:06:02,076 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:06:02,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:02 WrapperNode [2020-10-14 09:06:02,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:06:02,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:06:02,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:06:02,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:06:02,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:02" (1/1) ... [2020-10-14 09:06:02,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:02" (1/1) ... [2020-10-14 09:06:02,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:02" (1/1) ... [2020-10-14 09:06:02,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:02" (1/1) ... [2020-10-14 09:06:02,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:02" (1/1) ... [2020-10-14 09:06:02,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:02" (1/1) ... [2020-10-14 09:06:02,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:02" (1/1) ... [2020-10-14 09:06:02,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:06:02,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:06:02,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:06:02,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:06:02,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:02" (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 [2020-10-14 09:06:02,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:06:02,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:06:02,215 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:06:02,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:06:02,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:06:02,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:06:02,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:06:02,216 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:06:02,216 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:06:02,216 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:06:02,216 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:06:02,216 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:06:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:06:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:06:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:06:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:06:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:06:02,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:06:02,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:06:02,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:06:03,042 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:06:03,043 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:06:03,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:06:03 BoogieIcfgContainer [2020-10-14 09:06:03,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:06:03,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:06:03,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:06:03,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:06:03,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:06:01" (1/3) ... [2020-10-14 09:06:03,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e05fc4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:06:03, skipping insertion in model container [2020-10-14 09:06:03,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:06:02" (2/3) ... [2020-10-14 09:06:03,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e05fc4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:06:03, skipping insertion in model container [2020-10-14 09:06:03,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:06:03" (3/3) ... [2020-10-14 09:06:03,057 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-14 09:06:03,068 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:06:03,076 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:06:03,091 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:06:03,117 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:06:03,117 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:06:03,117 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:06:03,118 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:06:03,118 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:06:03,118 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:06:03,118 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:06:03,119 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:06:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states. [2020-10-14 09:06:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 09:06:03,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:03,151 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] [2020-10-14 09:06:03,152 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:03,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2097319933, now seen corresponding path program 1 times [2020-10-14 09:06:03,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:03,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946899290] [2020-10-14 09:06:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:03,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:03,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:03,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:05,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:05,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 09:06:05,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:06:05,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1663 [2020-10-14 09:06:05,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:05,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:05,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:06:05,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 09:06:05,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 09:06:05,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:06:05,376 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 09:06:05,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:05,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:05,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:05,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:05,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:05,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:06:05,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:05,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:05,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:05,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946899290] [2020-10-14 09:06:05,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:05,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:06:05,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133102792] [2020-10-14 09:06:05,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:06:05,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:05,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:06:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:06:05,440 INFO L87 Difference]: Start difference. First operand 167 states. Second operand 4 states. [2020-10-14 09:06:05,641 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-14 09:06:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:06,510 INFO L93 Difference]: Finished difference Result 317 states and 511 transitions. [2020-10-14 09:06:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:06:06,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-14 09:06:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:06,529 INFO L225 Difference]: With dead ends: 317 [2020-10-14 09:06:06,529 INFO L226 Difference]: Without dead ends: 241 [2020-10-14 09:06:06,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:06:06,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-14 09:06:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2020-10-14 09:06:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-14 09:06:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 353 transitions. [2020-10-14 09:06:06,615 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 353 transitions. Word has length 54 [2020-10-14 09:06:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:06,616 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 353 transitions. [2020-10-14 09:06:06,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:06:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 353 transitions. [2020-10-14 09:06:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 09:06:06,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:06,621 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] [2020-10-14 09:06:06,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:06:06,625 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:06,626 INFO L82 PathProgramCache]: Analyzing trace with hash -926705827, now seen corresponding path program 1 times [2020-10-14 09:06:06,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:06,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258029293] [2020-10-14 09:06:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:06,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:06,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:07,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:11,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:11,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 09:06:11,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:06:11,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 09:06:11,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:11,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:11,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:06:11,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 09:06:11,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 09:06:11,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:11,866 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 09:06:11,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:11,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:11,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:11,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:11,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:11,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:06:11,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:11,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:11,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:11,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:11,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:11,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:06:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:11,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258029293] [2020-10-14 09:06:11,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:11,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:06:11,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239375404] [2020-10-14 09:06:11,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:06:11,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:11,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:06:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:06:11,915 INFO L87 Difference]: Start difference. First operand 239 states and 353 transitions. Second operand 4 states. [2020-10-14 09:06:12,062 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-14 09:06:12,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:12,664 INFO L93 Difference]: Finished difference Result 575 states and 871 transitions. [2020-10-14 09:06:12,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:06:12,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-14 09:06:12,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:12,689 INFO L225 Difference]: With dead ends: 575 [2020-10-14 09:06:12,690 INFO L226 Difference]: Without dead ends: 408 [2020-10-14 09:06:12,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:06:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-14 09:06:12,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2020-10-14 09:06:12,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-14 09:06:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 603 transitions. [2020-10-14 09:06:12,744 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 603 transitions. Word has length 57 [2020-10-14 09:06:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:12,745 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 603 transitions. [2020-10-14 09:06:12,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:06:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 603 transitions. [2020-10-14 09:06:12,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 09:06:12,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:12,748 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] [2020-10-14 09:06:12,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:06:12,749 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash -559847393, now seen corresponding path program 1 times [2020-10-14 09:06:12,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:12,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937335486] [2020-10-14 09:06:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:12,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:12,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:12,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:13,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:13,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:15,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:15,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 09:06:15,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:06:15,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2845 [2020-10-14 09:06:15,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:15,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:06:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 09:06:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 09:06:15,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:15,803 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 09:06:15,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:15,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:15,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:15,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:15,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:15,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:06:15,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:15,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:15,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:15,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:15,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:15,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:15,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937335486] [2020-10-14 09:06:15,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:15,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:06:15,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29871528] [2020-10-14 09:06:15,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:06:15,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:15,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:06:15,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:06:15,839 INFO L87 Difference]: Start difference. First operand 406 states and 603 transitions. Second operand 4 states. [2020-10-14 09:06:15,960 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-14 09:06:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:16,495 INFO L93 Difference]: Finished difference Result 982 states and 1479 transitions. [2020-10-14 09:06:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:06:16,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-14 09:06:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:16,502 INFO L225 Difference]: With dead ends: 982 [2020-10-14 09:06:16,502 INFO L226 Difference]: Without dead ends: 696 [2020-10-14 09:06:16,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:06:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-10-14 09:06:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 694. [2020-10-14 09:06:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-10-14 09:06:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1025 transitions. [2020-10-14 09:06:16,560 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1025 transitions. Word has length 57 [2020-10-14 09:06:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:16,562 INFO L479 AbstractCegarLoop]: Abstraction has 694 states and 1025 transitions. [2020-10-14 09:06:16,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:06:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1025 transitions. [2020-10-14 09:06:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 09:06:16,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:16,574 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] [2020-10-14 09:06:16,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:06:16,575 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:16,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:16,575 INFO L82 PathProgramCache]: Analyzing trace with hash 980837471, now seen corresponding path program 1 times [2020-10-14 09:06:16,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:16,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213801068] [2020-10-14 09:06:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:16,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:16,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:16,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:17,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:19,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:19,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 09:06:19,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:06:19,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2739 [2020-10-14 09:06:19,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:19,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:06:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:06:19,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 09:06:19,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:19,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:19,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:19,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:19,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:19,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:19,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:06:19,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:19,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:19,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:19,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:19,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:19,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:19,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213801068] [2020-10-14 09:06:19,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:19,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:06:19,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428669430] [2020-10-14 09:06:19,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:06:19,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:19,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:06:19,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:06:19,512 INFO L87 Difference]: Start difference. First operand 694 states and 1025 transitions. Second operand 4 states. [2020-10-14 09:06:19,659 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-14 09:06:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:20,339 INFO L93 Difference]: Finished difference Result 1772 states and 2629 transitions. [2020-10-14 09:06:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:06:20,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-14 09:06:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:20,353 INFO L225 Difference]: With dead ends: 1772 [2020-10-14 09:06:20,353 INFO L226 Difference]: Without dead ends: 1174 [2020-10-14 09:06:20,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:06:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2020-10-14 09:06:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1172. [2020-10-14 09:06:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2020-10-14 09:06:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1695 transitions. [2020-10-14 09:06:20,445 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1695 transitions. Word has length 57 [2020-10-14 09:06:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:20,446 INFO L479 AbstractCegarLoop]: Abstraction has 1172 states and 1695 transitions. [2020-10-14 09:06:20,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:06:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1695 transitions. [2020-10-14 09:06:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 09:06:20,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:20,448 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] [2020-10-14 09:06:20,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:06:20,449 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:20,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1147607800, now seen corresponding path program 1 times [2020-10-14 09:06:20,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:20,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164651204] [2020-10-14 09:06:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:20,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:20,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:20,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:20,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:20,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:22,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:22,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 09:06:22,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:06:22,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2517 [2020-10-14 09:06:22,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:22,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:06:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:06:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 09:06:22,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:23,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:23,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:23,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:23,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:23,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:23,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:06:23,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:23,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:23,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:23,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:23,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:23,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:06:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:23,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164651204] [2020-10-14 09:06:23,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:23,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:06:23,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925874514] [2020-10-14 09:06:23,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:06:23,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:23,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:06:23,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:06:23,172 INFO L87 Difference]: Start difference. First operand 1172 states and 1695 transitions. Second operand 6 states. [2020-10-14 09:06:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:24,027 INFO L93 Difference]: Finished difference Result 3160 states and 4646 transitions. [2020-10-14 09:06:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:06:24,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-14 09:06:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:24,042 INFO L225 Difference]: With dead ends: 3160 [2020-10-14 09:06:24,042 INFO L226 Difference]: Without dead ends: 2446 [2020-10-14 09:06:24,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:06:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2020-10-14 09:06:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1409. [2020-10-14 09:06:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1409 states. [2020-10-14 09:06:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 2051 transitions. [2020-10-14 09:06:24,140 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 2051 transitions. Word has length 58 [2020-10-14 09:06:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:24,141 INFO L479 AbstractCegarLoop]: Abstraction has 1409 states and 2051 transitions. [2020-10-14 09:06:24,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:06:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 2051 transitions. [2020-10-14 09:06:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 09:06:24,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:24,148 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] [2020-10-14 09:06:24,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:06:24,148 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:24,149 INFO L82 PathProgramCache]: Analyzing trace with hash -709067147, now seen corresponding path program 1 times [2020-10-14 09:06:24,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:24,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569500382] [2020-10-14 09:06:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:24,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:24,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:24,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:24,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:24,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:26,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:26,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 09:06:26,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:06:26,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2386 [2020-10-14 09:06:26,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:26,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:26,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:06:26,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:06:26,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 09:06:26,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:06:26,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:26,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:26,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:26,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:26,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:26,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:06:26,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:26,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:26,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:26,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569500382] [2020-10-14 09:06:26,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:26,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:06:26,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131125441] [2020-10-14 09:06:26,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:06:26,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:26,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:06:26,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:06:26,721 INFO L87 Difference]: Start difference. First operand 1409 states and 2051 transitions. Second operand 6 states. [2020-10-14 09:06:26,887 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-14 09:06:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:27,854 INFO L93 Difference]: Finished difference Result 3656 states and 5384 transitions. [2020-10-14 09:06:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:06:27,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-14 09:06:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:27,871 INFO L225 Difference]: With dead ends: 3656 [2020-10-14 09:06:27,871 INFO L226 Difference]: Without dead ends: 2942 [2020-10-14 09:06:27,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:06:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2020-10-14 09:06:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1780. [2020-10-14 09:06:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2020-10-14 09:06:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2608 transitions. [2020-10-14 09:06:27,993 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2608 transitions. Word has length 58 [2020-10-14 09:06:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:27,993 INFO L479 AbstractCegarLoop]: Abstraction has 1780 states and 2608 transitions. [2020-10-14 09:06:27,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:06:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2608 transitions. [2020-10-14 09:06:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 09:06:27,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:27,995 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] [2020-10-14 09:06:27,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:06:27,996 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1985667494, now seen corresponding path program 1 times [2020-10-14 09:06:27,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:27,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919695939] [2020-10-14 09:06:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:28,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:28,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:28,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:28,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:28,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:29,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:29,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 09:06:29,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:06:29,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1863 [2020-10-14 09:06:29,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:29,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:29,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:06:29,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 09:06:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 09:06:29,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:30,039 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 09:06:30,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:30,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:30,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:30,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:30,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:30,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:06:30,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:30,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:30,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:30,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:30,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:30,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:30,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919695939] [2020-10-14 09:06:30,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:30,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:06:30,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708501848] [2020-10-14 09:06:30,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:06:30,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:30,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:06:30,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:06:30,071 INFO L87 Difference]: Start difference. First operand 1780 states and 2608 transitions. Second operand 6 states. [2020-10-14 09:06:30,212 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-14 09:06:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:31,141 INFO L93 Difference]: Finished difference Result 4150 states and 6110 transitions. [2020-10-14 09:06:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:06:31,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-14 09:06:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:31,160 INFO L225 Difference]: With dead ends: 4150 [2020-10-14 09:06:31,161 INFO L226 Difference]: Without dead ends: 3436 [2020-10-14 09:06:31,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:06:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2020-10-14 09:06:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2148. [2020-10-14 09:06:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2148 states. [2020-10-14 09:06:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 3163 transitions. [2020-10-14 09:06:31,382 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 3163 transitions. Word has length 58 [2020-10-14 09:06:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:31,382 INFO L479 AbstractCegarLoop]: Abstraction has 2148 states and 3163 transitions. [2020-10-14 09:06:31,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:06:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 3163 transitions. [2020-10-14 09:06:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 09:06:31,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:31,385 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] [2020-10-14 09:06:31,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:06:31,385 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:31,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:31,386 INFO L82 PathProgramCache]: Analyzing trace with hash 988763156, now seen corresponding path program 1 times [2020-10-14 09:06:31,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:31,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875673780] [2020-10-14 09:06:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:31,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:31,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:31,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:31,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:31,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:31,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:32,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:32,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:33,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:36,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:36,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 09:06:36,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:06:36,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:06:36,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:36,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:36,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:06:36,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:06:36,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 09:06:36,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:36,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:36,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:36,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:36,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:36,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:06:36,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:36,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:36,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:06:36,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:36,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:06:36,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:36,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875673780] [2020-10-14 09:06:36,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:36,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:06:36,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331043846] [2020-10-14 09:06:36,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:06:36,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:06:36,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:06:36,591 INFO L87 Difference]: Start difference. First operand 2148 states and 3163 transitions. Second operand 6 states. [2020-10-14 09:06:36,734 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:06:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:37,520 INFO L93 Difference]: Finished difference Result 4926 states and 7259 transitions. [2020-10-14 09:06:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:06:37,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-10-14 09:06:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:37,534 INFO L225 Difference]: With dead ends: 4926 [2020-10-14 09:06:37,534 INFO L226 Difference]: Without dead ends: 2864 [2020-10-14 09:06:37,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:06:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2020-10-14 09:06:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2849. [2020-10-14 09:06:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2849 states. [2020-10-14 09:06:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4156 transitions. [2020-10-14 09:06:37,730 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4156 transitions. Word has length 62 [2020-10-14 09:06:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:37,730 INFO L479 AbstractCegarLoop]: Abstraction has 2849 states and 4156 transitions. [2020-10-14 09:06:37,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:06:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4156 transitions. [2020-10-14 09:06:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 09:06:37,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:37,733 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] [2020-10-14 09:06:37,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:06:37,733 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:37,734 INFO L82 PathProgramCache]: Analyzing trace with hash -709158608, now seen corresponding path program 1 times [2020-10-14 09:06:37,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:37,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025520546] [2020-10-14 09:06:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:37,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:37,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:37,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:37,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:38,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:38,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:38,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:38,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:38,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:38,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:38,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:38,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:38,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:39,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:39,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:42,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:42,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 09:06:42,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:06:42,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:06:42,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:42,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:06:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:06:42,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 09:06:42,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:06:42,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:42,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:42,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:42,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:42,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:42,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:06:42,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:42,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:06:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:42,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025520546] [2020-10-14 09:06:42,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:42,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:06:42,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817591268] [2020-10-14 09:06:42,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:06:42,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:06:42,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:06:42,909 INFO L87 Difference]: Start difference. First operand 2849 states and 4156 transitions. Second operand 6 states. [2020-10-14 09:06:45,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:45,828 INFO L93 Difference]: Finished difference Result 21046 states and 30965 transitions. [2020-10-14 09:06:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:06:45,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-10-14 09:06:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:45,923 INFO L225 Difference]: With dead ends: 21046 [2020-10-14 09:06:45,923 INFO L226 Difference]: Without dead ends: 18523 [2020-10-14 09:06:45,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:06:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18523 states. [2020-10-14 09:06:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18523 to 10008. [2020-10-14 09:06:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10008 states. [2020-10-14 09:06:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 14625 transitions. [2020-10-14 09:06:46,793 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 14625 transitions. Word has length 62 [2020-10-14 09:06:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:46,793 INFO L479 AbstractCegarLoop]: Abstraction has 10008 states and 14625 transitions. [2020-10-14 09:06:46,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:06:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 14625 transitions. [2020-10-14 09:06:46,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 09:06:46,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:46,805 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] [2020-10-14 09:06:46,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:06:46,805 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:46,806 INFO L82 PathProgramCache]: Analyzing trace with hash -418393615, now seen corresponding path program 1 times [2020-10-14 09:06:46,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:46,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258988337] [2020-10-14 09:06:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:46,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:46,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:46,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:47,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:47,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:47,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:48,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:48,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:48,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:50,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:50,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:50,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:50,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:50,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:51,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:51,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:51,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:51,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 09:06:51,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:06:51,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:06:51,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:51,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:51,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:06:51,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:06:51,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 09:06:51,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:51,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:51,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:51,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:51,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:51,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:51,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:06:51,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:51,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:51,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:51,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:52,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258988337] [2020-10-14 09:06:52,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:52,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:06:52,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703737456] [2020-10-14 09:06:52,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:06:52,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:52,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:06:52,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:06:52,002 INFO L87 Difference]: Start difference. First operand 10008 states and 14625 transitions. Second operand 6 states. [2020-10-14 09:06:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:56,629 INFO L93 Difference]: Finished difference Result 79165 states and 115778 transitions. [2020-10-14 09:06:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:06:56,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-10-14 09:06:56,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:56,843 INFO L225 Difference]: With dead ends: 79165 [2020-10-14 09:06:56,844 INFO L226 Difference]: Without dead ends: 69707 [2020-10-14 09:06:56,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:06:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69707 states. [2020-10-14 09:07:00,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69707 to 36460. [2020-10-14 09:07:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36460 states. [2020-10-14 09:07:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36460 states to 36460 states and 52921 transitions. [2020-10-14 09:07:00,358 INFO L78 Accepts]: Start accepts. Automaton has 36460 states and 52921 transitions. Word has length 63 [2020-10-14 09:07:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:00,359 INFO L479 AbstractCegarLoop]: Abstraction has 36460 states and 52921 transitions. [2020-10-14 09:07:00,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36460 states and 52921 transitions. [2020-10-14 09:07:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 09:07:00,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:00,369 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] [2020-10-14 09:07:00,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:07:00,370 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:00,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:00,370 INFO L82 PathProgramCache]: Analyzing trace with hash 502973967, now seen corresponding path program 1 times [2020-10-14 09:07:00,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:00,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135384148] [2020-10-14 09:07:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:00,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:00,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:00,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:00,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:00,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:01,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:01,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:01,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:01,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:02,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:02,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:02,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:03,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:03,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:04,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:04,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:04,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:04,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:04,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:04,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:04,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:04,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:05,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:05,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:05,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 09:07:05,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-14 09:07:05,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:07:05,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:05,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:05,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:07:05,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:07:05,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 09:07:05,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:05,626 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 09:07:05,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:05,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:05,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:05,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:05,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:05,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 09:07:05,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:05,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:05,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:05,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:05,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:05,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:05,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135384148] [2020-10-14 09:07:05,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:05,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:07:05,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815700598] [2020-10-14 09:07:05,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:07:05,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:05,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:07:05,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:05,648 INFO L87 Difference]: Start difference. First operand 36460 states and 52921 transitions. Second operand 6 states. [2020-10-14 09:07:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:16,400 INFO L93 Difference]: Finished difference Result 216312 states and 312614 transitions. [2020-10-14 09:07:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 09:07:16,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-14 09:07:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:16,824 INFO L225 Difference]: With dead ends: 216312 [2020-10-14 09:07:16,824 INFO L226 Difference]: Without dead ends: 183970 [2020-10-14 09:07:16,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:07:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183970 states. [2020-10-14 09:07:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183970 to 35872. [2020-10-14 09:07:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35872 states. [2020-10-14 09:07:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35872 states to 35872 states and 51619 transitions. [2020-10-14 09:07:20,353 INFO L78 Accepts]: Start accepts. Automaton has 35872 states and 51619 transitions. Word has length 64 [2020-10-14 09:07:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:20,353 INFO L479 AbstractCegarLoop]: Abstraction has 35872 states and 51619 transitions. [2020-10-14 09:07:20,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 35872 states and 51619 transitions. [2020-10-14 09:07:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 09:07:20,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:20,365 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] [2020-10-14 09:07:20,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:07:20,365 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:20,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:20,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1693951341, now seen corresponding path program 1 times [2020-10-14 09:07:20,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:20,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296917488] [2020-10-14 09:07:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:20,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:21,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:21,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:21,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:21,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:25,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 09:07:25,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:07:25,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:07:25,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:25,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:25,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:07:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:07:25,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:07:25,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:25,548 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 09:07:25,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:25,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:25,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:25,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:25,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:07:25,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:25,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:25,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:25,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:25,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296917488] [2020-10-14 09:07:25,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:25,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:07:25,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318363579] [2020-10-14 09:07:25,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:07:25,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:25,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:07:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:25,581 INFO L87 Difference]: Start difference. First operand 35872 states and 51619 transitions. Second operand 6 states. [2020-10-14 09:07:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:35,464 INFO L93 Difference]: Finished difference Result 180044 states and 259018 transitions. [2020-10-14 09:07:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 09:07:35,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-14 09:07:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:35,717 INFO L225 Difference]: With dead ends: 180044 [2020-10-14 09:07:35,717 INFO L226 Difference]: Without dead ends: 148664 [2020-10-14 09:07:35,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:07:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148664 states. [2020-10-14 09:07:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148664 to 35373. [2020-10-14 09:07:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35373 states. [2020-10-14 09:07:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35373 states to 35373 states and 50541 transitions. [2020-10-14 09:07:39,091 INFO L78 Accepts]: Start accepts. Automaton has 35373 states and 50541 transitions. Word has length 64 [2020-10-14 09:07:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:39,092 INFO L479 AbstractCegarLoop]: Abstraction has 35373 states and 50541 transitions. [2020-10-14 09:07:39,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 35373 states and 50541 transitions. [2020-10-14 09:07:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 09:07:39,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:39,101 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] [2020-10-14 09:07:39,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:07:39,102 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:39,102 INFO L82 PathProgramCache]: Analyzing trace with hash 448553035, now seen corresponding path program 1 times [2020-10-14 09:07:39,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:39,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267197027] [2020-10-14 09:07:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:39,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:39,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:39,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:39,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:39,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:39,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:39,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:39,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:40,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:40,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:40,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:41,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:43,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:43,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:43,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:43,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:43,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:44,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:44,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 09:07:44,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-14 09:07:44,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:07:44,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:44,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:07:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:07:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:07:44,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:44,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:44,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:44,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:44,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:44,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:44,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:07:44,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:44,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:44,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:44,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267197027] [2020-10-14 09:07:44,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:44,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:07:44,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830335784] [2020-10-14 09:07:44,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:07:44,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:07:44,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:44,264 INFO L87 Difference]: Start difference. First operand 35373 states and 50541 transitions. Second operand 6 states. [2020-10-14 09:07:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:53,375 INFO L93 Difference]: Finished difference Result 156558 states and 223001 transitions. [2020-10-14 09:07:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 09:07:53,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-14 09:07:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:53,541 INFO L225 Difference]: With dead ends: 156558 [2020-10-14 09:07:53,541 INFO L226 Difference]: Without dead ends: 124012 [2020-10-14 09:07:53,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:07:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124012 states. [2020-10-14 09:07:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124012 to 34924. [2020-10-14 09:07:56,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34924 states. [2020-10-14 09:07:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34924 states to 34924 states and 49372 transitions. [2020-10-14 09:07:56,701 INFO L78 Accepts]: Start accepts. Automaton has 34924 states and 49372 transitions. Word has length 64 [2020-10-14 09:07:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:56,702 INFO L479 AbstractCegarLoop]: Abstraction has 34924 states and 49372 transitions. [2020-10-14 09:07:56,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 34924 states and 49372 transitions. [2020-10-14 09:07:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 09:07:56,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:56,711 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] [2020-10-14 09:07:56,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:07:56,711 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1005787880, now seen corresponding path program 1 times [2020-10-14 09:07:56,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:56,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829564686] [2020-10-14 09:07:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:56,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:56,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:56,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:56,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:57,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:58,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:58,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:58,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:58,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:01,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:01,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:01,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:01,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:01,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 09:08:01,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:08:01,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 09:08:01,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:01,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:08:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:08:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 09:08:01,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:01,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:01,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:01,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:01,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:01,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:01,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:08:01,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:01,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:01,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:01,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:01,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:08:01,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:01,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829564686] [2020-10-14 09:08:01,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:01,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:08:01,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399158602] [2020-10-14 09:08:01,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:08:01,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:01,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:08:01,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:08:01,953 INFO L87 Difference]: Start difference. First operand 34924 states and 49372 transitions. Second operand 6 states. [2020-10-14 09:08:02,104 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:08:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:04,563 INFO L93 Difference]: Finished difference Result 52800 states and 74897 transitions. [2020-10-14 09:08:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:08:04,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-14 09:08:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:04,596 INFO L225 Difference]: With dead ends: 52800 [2020-10-14 09:08:04,596 INFO L226 Difference]: Without dead ends: 25366 [2020-10-14 09:08:04,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 09:08:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25366 states. [2020-10-14 09:08:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25366 to 25282. [2020-10-14 09:08:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25282 states. [2020-10-14 09:08:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25282 states to 25282 states and 35665 transitions. [2020-10-14 09:08:06,547 INFO L78 Accepts]: Start accepts. Automaton has 25282 states and 35665 transitions. Word has length 65 [2020-10-14 09:08:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:06,547 INFO L479 AbstractCegarLoop]: Abstraction has 25282 states and 35665 transitions. [2020-10-14 09:08:06,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:08:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 25282 states and 35665 transitions. [2020-10-14 09:08:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 09:08:06,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:06,553 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] [2020-10-14 09:08:06,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:08:06,553 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:06,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1253681867, now seen corresponding path program 1 times [2020-10-14 09:08:06,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:06,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045915940] [2020-10-14 09:08:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:06,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:06,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:06,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:06,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:06,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:07,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:07,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:07,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:07,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:08,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:08,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:08,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:08,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:08,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:09,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:09,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:09,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:11,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:11,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 09:08:11,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 09:08:11,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:08:11,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:11,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:11,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:08:11,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:08:11,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 09:08:11,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:11,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:11,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:11,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:11,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:11,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:11,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:08:11,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:11,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:11,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:11,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:11,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:08:11,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:11,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045915940] [2020-10-14 09:08:11,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:11,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:08:11,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439910576] [2020-10-14 09:08:11,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:08:11,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:11,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:08:11,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:08:11,716 INFO L87 Difference]: Start difference. First operand 25282 states and 35665 transitions. Second operand 6 states. [2020-10-14 09:08:11,858 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:08:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:13,667 INFO L93 Difference]: Finished difference Result 35116 states and 49593 transitions. [2020-10-14 09:08:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:08:13,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-14 09:08:13,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:13,684 INFO L225 Difference]: With dead ends: 35116 [2020-10-14 09:08:13,684 INFO L226 Difference]: Without dead ends: 15087 [2020-10-14 09:08:13,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:08:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15087 states. [2020-10-14 09:08:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15087 to 15031. [2020-10-14 09:08:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15031 states. [2020-10-14 09:08:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15031 states to 15031 states and 21009 transitions. [2020-10-14 09:08:14,856 INFO L78 Accepts]: Start accepts. Automaton has 15031 states and 21009 transitions. Word has length 65 [2020-10-14 09:08:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:14,857 INFO L479 AbstractCegarLoop]: Abstraction has 15031 states and 21009 transitions. [2020-10-14 09:08:14,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:08:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 15031 states and 21009 transitions. [2020-10-14 09:08:14,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:08:14,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:14,860 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] [2020-10-14 09:08:14,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:08:14,860 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash -550240412, now seen corresponding path program 1 times [2020-10-14 09:08:14,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:14,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911922444] [2020-10-14 09:08:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:14,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:14,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:14,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:15,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:15,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:15,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:16,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:16,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:16,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:16,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:16,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:17,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:18,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:18,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:18,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:19,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:19,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:19,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:19,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:08:19,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 09:08:19,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:08:19,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:19,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:19,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 09:08:19,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:08:19,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 09:08:19,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:20,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:20,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:20,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:20,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:20,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:20,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:08:20,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:20,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:20,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:20,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:20,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:20,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:20,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911922444] [2020-10-14 09:08:20,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:20,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-14 09:08:20,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428931657] [2020-10-14 09:08:20,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 09:08:20,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:20,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 09:08:20,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:08:20,306 INFO L87 Difference]: Start difference. First operand 15031 states and 21009 transitions. Second operand 10 states. [2020-10-14 09:08:20,670 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 131 [2020-10-14 09:08:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:24,238 INFO L93 Difference]: Finished difference Result 31926 states and 44513 transitions. [2020-10-14 09:08:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 09:08:24,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-14 09:08:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:24,264 INFO L225 Difference]: With dead ends: 31926 [2020-10-14 09:08:24,265 INFO L226 Difference]: Without dead ends: 23245 [2020-10-14 09:08:24,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-10-14 09:08:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23245 states. [2020-10-14 09:08:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23245 to 14779. [2020-10-14 09:08:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14779 states. [2020-10-14 09:08:25,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 20664 transitions. [2020-10-14 09:08:25,642 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 20664 transitions. Word has length 66 [2020-10-14 09:08:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:25,642 INFO L479 AbstractCegarLoop]: Abstraction has 14779 states and 20664 transitions. [2020-10-14 09:08:25,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 09:08:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 20664 transitions. [2020-10-14 09:08:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:08:25,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:25,645 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] [2020-10-14 09:08:25,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:08:25,645 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:25,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:25,646 INFO L82 PathProgramCache]: Analyzing trace with hash -7001504, now seen corresponding path program 1 times [2020-10-14 09:08:25,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:25,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097071508] [2020-10-14 09:08:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:25,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:25,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:25,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:26,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:26,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:26,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:27,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:27,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:27,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:27,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:27,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:27,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:28,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:28,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:28,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:28,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:29,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:30,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:30,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:08:30,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:08:30,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:08:30,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:30,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:30,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 09:08:30,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:08:30,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 09:08:30,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:30,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:30,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:30,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:30,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:30,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:30,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:08:30,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:30,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:08:30,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:30,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097071508] [2020-10-14 09:08:30,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:30,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-14 09:08:30,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704608285] [2020-10-14 09:08:30,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 09:08:30,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:30,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 09:08:30,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:08:30,939 INFO L87 Difference]: Start difference. First operand 14779 states and 20664 transitions. Second operand 11 states. [2020-10-14 09:08:31,104 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-14 09:08:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:36,105 INFO L93 Difference]: Finished difference Result 45135 states and 63098 transitions. [2020-10-14 09:08:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 09:08:36,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-14 09:08:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:36,146 INFO L225 Difference]: With dead ends: 45135 [2020-10-14 09:08:36,146 INFO L226 Difference]: Without dead ends: 31316 [2020-10-14 09:08:36,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-10-14 09:08:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31316 states. [2020-10-14 09:08:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31316 to 14539. [2020-10-14 09:08:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14539 states. [2020-10-14 09:08:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14539 states to 14539 states and 20324 transitions. [2020-10-14 09:08:37,803 INFO L78 Accepts]: Start accepts. Automaton has 14539 states and 20324 transitions. Word has length 66 [2020-10-14 09:08:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:37,804 INFO L479 AbstractCegarLoop]: Abstraction has 14539 states and 20324 transitions. [2020-10-14 09:08:37,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 09:08:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 14539 states and 20324 transitions. [2020-10-14 09:08:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:08:37,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:37,806 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] [2020-10-14 09:08:37,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:08:37,807 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash 963695571, now seen corresponding path program 1 times [2020-10-14 09:08:37,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:37,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251075471] [2020-10-14 09:08:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:37,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:37,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:37,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:38,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:38,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:40,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:40,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:08:40,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:08:40,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3038 [2020-10-14 09:08:40,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:40,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:40,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:40,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 09:08:40,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:08:40,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:40,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:40,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:40,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:40,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:40,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:40,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:08:40,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:40,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:40,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:40,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:40,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:40,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:40,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251075471] [2020-10-14 09:08:40,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:40,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:40,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762715890] [2020-10-14 09:08:40,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:40,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:40,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:40,994 INFO L87 Difference]: Start difference. First operand 14539 states and 20324 transitions. Second operand 4 states. [2020-10-14 09:08:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:43,105 INFO L93 Difference]: Finished difference Result 22320 states and 31121 transitions. [2020-10-14 09:08:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:08:43,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:08:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:43,122 INFO L225 Difference]: With dead ends: 22320 [2020-10-14 09:08:43,122 INFO L226 Difference]: Without dead ends: 14541 [2020-10-14 09:08:43,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14541 states. [2020-10-14 09:08:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14541 to 14539. [2020-10-14 09:08:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14539 states. [2020-10-14 09:08:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14539 states to 14539 states and 20031 transitions. [2020-10-14 09:08:44,670 INFO L78 Accepts]: Start accepts. Automaton has 14539 states and 20031 transitions. Word has length 67 [2020-10-14 09:08:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:44,671 INFO L479 AbstractCegarLoop]: Abstraction has 14539 states and 20031 transitions. [2020-10-14 09:08:44,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:08:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 14539 states and 20031 transitions. [2020-10-14 09:08:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:08:44,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:44,673 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] [2020-10-14 09:08:44,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:08:44,674 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 132253940, now seen corresponding path program 1 times [2020-10-14 09:08:44,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:44,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184425240] [2020-10-14 09:08:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:44,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:44,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:44,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:45,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:45,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:45,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:45,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:46,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:46,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:08:46,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:08:46,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2258 [2020-10-14 09:08:46,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:46,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 09:08:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:08:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 09:08:46,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:47,147 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-14 09:08:47,293 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 09:08:47,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:47,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:47,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:47,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:47,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 09:08:47,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:47,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:47,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:47,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:47,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:47,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:47,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184425240] [2020-10-14 09:08:47,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:47,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-14 09:08:47,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671320253] [2020-10-14 09:08:47,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 09:08:47,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:47,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 09:08:47,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:08:47,314 INFO L87 Difference]: Start difference. First operand 14539 states and 20031 transitions. Second operand 10 states. [2020-10-14 09:08:47,453 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-14 09:08:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:52,177 INFO L93 Difference]: Finished difference Result 34921 states and 47860 transitions. [2020-10-14 09:08:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 09:08:52,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-14 09:08:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:52,211 INFO L225 Difference]: With dead ends: 34921 [2020-10-14 09:08:52,212 INFO L226 Difference]: Without dead ends: 26061 [2020-10-14 09:08:52,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-14 09:08:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26061 states. [2020-10-14 09:08:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26061 to 14358. [2020-10-14 09:08:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14358 states. [2020-10-14 09:08:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14358 states to 14358 states and 19794 transitions. [2020-10-14 09:08:54,148 INFO L78 Accepts]: Start accepts. Automaton has 14358 states and 19794 transitions. Word has length 68 [2020-10-14 09:08:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:54,149 INFO L479 AbstractCegarLoop]: Abstraction has 14358 states and 19794 transitions. [2020-10-14 09:08:54,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 09:08:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 14358 states and 19794 transitions. [2020-10-14 09:08:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:08:54,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:54,152 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] [2020-10-14 09:08:54,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 09:08:54,152 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:54,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:54,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2099063966, now seen corresponding path program 1 times [2020-10-14 09:08:54,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:54,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683709479] [2020-10-14 09:08:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:54,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:54,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:54,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:54,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:55,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:55,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:08:55,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:08:55,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1602 [2020-10-14 09:08:55,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:55,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:55,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:55,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 09:08:55,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 09:08:55,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:56,030 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 09:08:56,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:56,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:56,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:56,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:56,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:56,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:08:56,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:56,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:56,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:56,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:56,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:56,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:56,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683709479] [2020-10-14 09:08:56,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:56,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:56,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613793229] [2020-10-14 09:08:56,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:56,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:56,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:56,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:56,055 INFO L87 Difference]: Start difference. First operand 14358 states and 19794 transitions. Second operand 4 states. [2020-10-14 09:08:56,175 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-14 09:09:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:00,250 INFO L93 Difference]: Finished difference Result 39543 states and 54707 transitions. [2020-10-14 09:09:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:00,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:09:00,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:00,277 INFO L225 Difference]: With dead ends: 39543 [2020-10-14 09:09:00,277 INFO L226 Difference]: Without dead ends: 26373 [2020-10-14 09:09:00,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26373 states. [2020-10-14 09:09:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26373 to 24472. [2020-10-14 09:09:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24472 states. [2020-10-14 09:09:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24472 states to 24472 states and 33870 transitions. [2020-10-14 09:09:03,523 INFO L78 Accepts]: Start accepts. Automaton has 24472 states and 33870 transitions. Word has length 73 [2020-10-14 09:09:03,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:03,523 INFO L479 AbstractCegarLoop]: Abstraction has 24472 states and 33870 transitions. [2020-10-14 09:09:03,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 24472 states and 33870 transitions. [2020-10-14 09:09:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:09:03,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:03,527 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] [2020-10-14 09:09:03,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 09:09:03,528 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:03,528 INFO L82 PathProgramCache]: Analyzing trace with hash 887164406, now seen corresponding path program 1 times [2020-10-14 09:09:03,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:03,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419591780] [2020-10-14 09:09:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:03,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:03,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:03,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:03,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:03,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:04,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:04,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:09:04,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:09:04,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1288 [2020-10-14 09:09:04,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:04,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:04,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:04,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 09:09:04,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 09:09:04,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:04,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:04,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:04,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:04,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:04,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:04,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:09:04,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:04,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:04,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:04,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:04,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:04,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:05,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419591780] [2020-10-14 09:09:05,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:05,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:05,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324927884] [2020-10-14 09:09:05,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:05,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:05,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:05,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:05,002 INFO L87 Difference]: Start difference. First operand 24472 states and 33870 transitions. Second operand 4 states. [2020-10-14 09:09:05,135 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-14 09:09:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:12,125 INFO L93 Difference]: Finished difference Result 68664 states and 94694 transitions. [2020-10-14 09:09:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:12,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-14 09:09:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:12,178 INFO L225 Difference]: With dead ends: 68664 [2020-10-14 09:09:12,178 INFO L226 Difference]: Without dead ends: 45380 [2020-10-14 09:09:12,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:12,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45380 states. [2020-10-14 09:09:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45380 to 42030. [2020-10-14 09:09:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42030 states. [2020-10-14 09:09:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42030 states to 42030 states and 57639 transitions. [2020-10-14 09:09:18,296 INFO L78 Accepts]: Start accepts. Automaton has 42030 states and 57639 transitions. Word has length 74 [2020-10-14 09:09:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:18,296 INFO L479 AbstractCegarLoop]: Abstraction has 42030 states and 57639 transitions. [2020-10-14 09:09:18,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 42030 states and 57639 transitions. [2020-10-14 09:09:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:09:18,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:18,299 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] [2020-10-14 09:09:18,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 09:09:18,300 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:18,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1594899189, now seen corresponding path program 1 times [2020-10-14 09:09:18,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:18,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755847912] [2020-10-14 09:09:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:18,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:18,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:18,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:18,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:18,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:18,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:19,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:19,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:09:19,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:09:19,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1256 [2020-10-14 09:09:19,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:19,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:19,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:19,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:09:19,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 09:09:19,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:19,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:19,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:19,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:19,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:19,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:19,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:09:19,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:19,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:19,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:19,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:19,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:19,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:19,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755847912] [2020-10-14 09:09:19,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:19,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:19,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643767477] [2020-10-14 09:09:19,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:19,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:19,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:19,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:19,725 INFO L87 Difference]: Start difference. First operand 42030 states and 57639 transitions. Second operand 4 states. [2020-10-14 09:09:19,853 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-14 09:09:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:32,241 INFO L93 Difference]: Finished difference Result 118647 states and 161294 transitions. [2020-10-14 09:09:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:32,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:09:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:32,333 INFO L225 Difference]: With dead ends: 118647 [2020-10-14 09:09:32,333 INFO L226 Difference]: Without dead ends: 77589 [2020-10-14 09:09:32,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2020-10-14 09:09:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 71107. [2020-10-14 09:09:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71107 states. [2020-10-14 09:09:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71107 states to 71107 states and 95420 transitions. [2020-10-14 09:09:44,324 INFO L78 Accepts]: Start accepts. Automaton has 71107 states and 95420 transitions. Word has length 75 [2020-10-14 09:09:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:44,324 INFO L479 AbstractCegarLoop]: Abstraction has 71107 states and 95420 transitions. [2020-10-14 09:09:44,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 71107 states and 95420 transitions. [2020-10-14 09:09:44,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:09:44,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:44,327 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] [2020-10-14 09:09:44,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 09:09:44,327 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:44,327 INFO L82 PathProgramCache]: Analyzing trace with hash -448060939, now seen corresponding path program 1 times [2020-10-14 09:09:44,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:44,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864302069] [2020-10-14 09:09:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:44,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:44,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:45,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:45,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:09:45,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:09:45,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-14 09:09:45,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:45,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:09:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 09:09:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 09:09:45,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:45,273 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 09:09:45,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:45,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:45,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:45,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:45,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:45,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:09:45,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:45,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:45,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:45,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864302069] [2020-10-14 09:09:45,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:45,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:09:45,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174857556] [2020-10-14 09:09:45,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:09:45,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:45,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:09:45,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:09:45,306 INFO L87 Difference]: Start difference. First operand 71107 states and 95420 transitions. Second operand 6 states.