/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:39:44,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:39:44,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:39:44,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:39:44,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:39:44,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:39:44,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:39:44,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:39:44,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:39:44,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:39:44,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:39:44,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:39:44,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:39:44,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:39:44,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:39:44,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:39:44,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:39:44,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:39:44,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:39:44,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:39:44,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:39:44,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:39:44,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:39:44,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:39:44,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:39:44,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:39:44,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:39:44,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:39:44,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:39:44,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:39:44,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:39:44,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:39:44,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:39:44,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:39:44,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:39:44,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:39:44,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:39:44,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:39:44,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:39:44,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:39:44,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:39:44,643 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 17:39:44,668 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:39:44,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:39:44,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:39:44,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:39:44,671 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:39:44,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:39:44,672 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:39:44,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:39:44,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:39:44,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:39:44,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:39:44,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:39:44,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:39:44,674 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:39:44,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:39:44,676 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:39:44,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:39:44,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:39:44,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:39:44,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:39:44,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:39:44,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:39:44,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:39:44,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:39:44,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:39:44,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:39:44,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:39:44,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:39:44,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:39:44,679 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:39:44,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:39:45,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:39:45,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:39:45,023 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:39:45,024 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:39:45,025 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum1.c [2020-10-14 17:39:45,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/413ecc1aa/c014f8393ed942eb8069a2ae893a6b14/FLAG40cb2ad53 [2020-10-14 17:39:45,573 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:39:45,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum1.c [2020-10-14 17:39:45,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/413ecc1aa/c014f8393ed942eb8069a2ae893a6b14/FLAG40cb2ad53 [2020-10-14 17:39:45,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/413ecc1aa/c014f8393ed942eb8069a2ae893a6b14 [2020-10-14 17:39:45,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:39:45,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:39:45,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:39:45,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:39:45,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:39:45,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:39:45" (1/1) ... [2020-10-14 17:39:45,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a33c50b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:45, skipping insertion in model container [2020-10-14 17:39:45,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:39:45" (1/1) ... [2020-10-14 17:39:45,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:39:45,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:39:46,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:39:46,208 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:39:46,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:39:46,244 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:39:46,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:46 WrapperNode [2020-10-14 17:39:46,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:39:46,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:39:46,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:39:46,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:39:46,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:46" (1/1) ... [2020-10-14 17:39:46,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:46" (1/1) ... [2020-10-14 17:39:46,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:46" (1/1) ... [2020-10-14 17:39:46,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:46" (1/1) ... [2020-10-14 17:39:46,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:46" (1/1) ... [2020-10-14 17:39:46,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:46" (1/1) ... [2020-10-14 17:39:46,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:46" (1/1) ... [2020-10-14 17:39:46,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:39:46,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:39:46,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:39:46,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:39:46,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:46" (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 17:39:46,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:39:46,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:39:46,457 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 17:39:46,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:39:46,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:39:46,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:39:46,459 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 17:39:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 17:39:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:39:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-14 17:39:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:39:46,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:39:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:39:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:39:46,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:39:46,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:39:46,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:39:46,774 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:39:46,775 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 17:39:46,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:39:46 BoogieIcfgContainer [2020-10-14 17:39:46,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:39:46,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:39:46,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:39:46,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:39:46,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:39:45" (1/3) ... [2020-10-14 17:39:46,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e698285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:39:46, skipping insertion in model container [2020-10-14 17:39:46,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:46" (2/3) ... [2020-10-14 17:39:46,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e698285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:39:46, skipping insertion in model container [2020-10-14 17:39:46,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:39:46" (3/3) ... [2020-10-14 17:39:46,787 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2020-10-14 17:39:46,797 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:39:46,804 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:39:46,818 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:39:46,841 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:39:46,841 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:39:46,841 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:39:46,841 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:39:46,841 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:39:46,841 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:39:46,841 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:39:46,842 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:39:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-14 17:39:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 17:39:46,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:46,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:46,864 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:46,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1137487515, now seen corresponding path program 1 times [2020-10-14 17:39:46,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:46,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523013465] [2020-10-14 17:39:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:47,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:47,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:47,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:47,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:47,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 17:39:47,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:39:47,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-14 17:39:47,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:47,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:47,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:39:47,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:39:47,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 17:39:47,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:39:47,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:47,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:47,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:47,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:47,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:39:47,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:47,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:47,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:47,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:47,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:47,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:39:47,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523013465] [2020-10-14 17:39:47,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:39:47,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 17:39:47,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391145510] [2020-10-14 17:39:47,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:39:47,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:47,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:39:47,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:39:47,746 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2020-10-14 17:39:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:48,043 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2020-10-14 17:39:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:39:48,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 17:39:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:48,056 INFO L225 Difference]: With dead ends: 59 [2020-10-14 17:39:48,056 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 17:39:48,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:39:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 17:39:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 17:39:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 17:39:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-14 17:39:48,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-14 17:39:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:48,117 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-14 17:39:48,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:39:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-14 17:39:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 17:39:48,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:48,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:48,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:39:48,121 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:48,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1186657245, now seen corresponding path program 1 times [2020-10-14 17:39:48,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:48,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333521155] [2020-10-14 17:39:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:48,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:48,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:48,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:48,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:48,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:48,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 17:39:48,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:39:48,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-14 17:39:48,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:48,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:48,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:39:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:39:48,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:39:48,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:48,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:48,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:48,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:48,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:48,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:48,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:39:48,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:48,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:48,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:48,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:48,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:48,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:39:48,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333521155] [2020-10-14 17:39:48,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:39:48,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:39:48,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583333002] [2020-10-14 17:39:48,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:39:48,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:39:48,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:39:48,458 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-14 17:39:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:48,604 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-14 17:39:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:39:48,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-14 17:39:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:48,606 INFO L225 Difference]: With dead ends: 36 [2020-10-14 17:39:48,607 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 17:39:48,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:39:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 17:39:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 17:39:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 17:39:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-14 17:39:48,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-10-14 17:39:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:48,617 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-14 17:39:48,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:39:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-14 17:39:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 17:39:48,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:48,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:48,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:39:48,619 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:48,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:48,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1621090339, now seen corresponding path program 1 times [2020-10-14 17:39:48,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:48,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295995652] [2020-10-14 17:39:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:48,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:48,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:48,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:49,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:49,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:49,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 17:39:49,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:39:49,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-14 17:39:49,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:49,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:49,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:39:49,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:39:49,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 17:39:49,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:49,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:49,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:49,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:49,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:49,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:49,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:39:49,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:49,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:49,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:39:49,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295995652] [2020-10-14 17:39:50,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:39:50,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:39:50,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100610573] [2020-10-14 17:39:50,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:39:50,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:39:50,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:39:50,002 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 14 states. [2020-10-14 17:39:50,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:50,282 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-14 17:39:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:39:50,283 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-14 17:39:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:50,284 INFO L225 Difference]: With dead ends: 39 [2020-10-14 17:39:50,284 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 17:39:50,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:39:50,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 17:39:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-14 17:39:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 17:39:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-14 17:39:50,292 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2020-10-14 17:39:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:50,293 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-14 17:39:50,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:39:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-14 17:39:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 17:39:50,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:50,294 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:50,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:39:50,295 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:50,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:50,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2072503141, now seen corresponding path program 2 times [2020-10-14 17:39:50,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:50,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894060577] [2020-10-14 17:39:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:50,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:50,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:50,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:50,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:39:50,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:39:50,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-14 17:39:50,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:50,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:39:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:39:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:39:50,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:50,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:50,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:50,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:50,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:50,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:50,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:39:50,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:50,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:50,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:50,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:50,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:50,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:39:50,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894060577] [2020-10-14 17:39:50,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:39:50,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:39:50,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157495757] [2020-10-14 17:39:50,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:39:50,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:50,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:39:50,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:39:50,611 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2020-10-14 17:39:50,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:50,799 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-14 17:39:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:39:50,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 17:39:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:50,801 INFO L225 Difference]: With dead ends: 50 [2020-10-14 17:39:50,801 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 17:39:50,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:39:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 17:39:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-10-14 17:39:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 17:39:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-14 17:39:50,808 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2020-10-14 17:39:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:50,808 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-14 17:39:50,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:39:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-14 17:39:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 17:39:50,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:50,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:50,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:39:50,810 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:50,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1770912987, now seen corresponding path program 3 times [2020-10-14 17:39:50,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:50,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982559116] [2020-10-14 17:39:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:50,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:50,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:51,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:51,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:39:51,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:39:51,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-14 17:39:51,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:51,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:51,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:39:51,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:39:51,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:39:51,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:51,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:51,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:51,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:51,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:51,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:51,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:39:51,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:51,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:51,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:51,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:39:51,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982559116] [2020-10-14 17:39:51,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:39:51,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:39:51,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274419281] [2020-10-14 17:39:51,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:39:51,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:51,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:39:51,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:39:51,157 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2020-10-14 17:39:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:51,413 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-14 17:39:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:39:51,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 17:39:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:51,415 INFO L225 Difference]: With dead ends: 35 [2020-10-14 17:39:51,415 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 17:39:51,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:39:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 17:39:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-14 17:39:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 17:39:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-14 17:39:51,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-10-14 17:39:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:51,423 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-14 17:39:51,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:39:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-14 17:39:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 17:39:51,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:51,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:51,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:39:51,425 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:51,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2057482777, now seen corresponding path program 4 times [2020-10-14 17:39:51,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:51,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496916558] [2020-10-14 17:39:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:51,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:51,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:51,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:51,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:52,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:53,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:53,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 17:39:53,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:39:53,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1998 [2020-10-14 17:39:53,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:53,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:53,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:39:53,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:39:53,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 17:39:53,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:39:54,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:54,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:54,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:54,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:54,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:54,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:39:54,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:54,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:54,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:54,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:54,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:54,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:39:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:39:54,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496916558] [2020-10-14 17:39:54,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:39:54,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:39:54,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720398703] [2020-10-14 17:39:54,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:39:54,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:54,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:39:54,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:39:54,044 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 18 states. [2020-10-14 17:39:54,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:54,548 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-10-14 17:39:54,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:39:54,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-14 17:39:54,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:54,550 INFO L225 Difference]: With dead ends: 45 [2020-10-14 17:39:54,550 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 17:39:54,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:39:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 17:39:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-14 17:39:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 17:39:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-14 17:39:54,562 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2020-10-14 17:39:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:54,563 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-14 17:39:54,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:39:54,563 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-14 17:39:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 17:39:54,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:54,564 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:54,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:39:54,565 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1721823273, now seen corresponding path program 5 times [2020-10-14 17:39:54,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:54,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791880133] [2020-10-14 17:39:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:54,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:54,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:54,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:54,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 17:39:54,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:39:54,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-14 17:39:54,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:54,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:54,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:39:54,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:39:54,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:39:54,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:55,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:55,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:55,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:55,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:55,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:55,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:39:55,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:55,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:55,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:39:55,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791880133] [2020-10-14 17:39:55,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:39:55,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:39:55,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713082686] [2020-10-14 17:39:55,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:39:55,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:55,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:39:55,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:39:55,049 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 12 states. [2020-10-14 17:39:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:55,252 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-14 17:39:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:39:55,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 17:39:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:55,254 INFO L225 Difference]: With dead ends: 56 [2020-10-14 17:39:55,254 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 17:39:55,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:39:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 17:39:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-10-14 17:39:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 17:39:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-14 17:39:55,261 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2020-10-14 17:39:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:55,262 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-14 17:39:55,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:39:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-14 17:39:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 17:39:55,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:55,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:55,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:39:55,263 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:55,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1870798825, now seen corresponding path program 6 times [2020-10-14 17:39:55,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:55,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103457754] [2020-10-14 17:39:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:55,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:55,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:55,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:55,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 17:39:55,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:39:55,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-14 17:39:55,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:55,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:55,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:39:55,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:39:55,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:39:55,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:55,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:55,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:55,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:55,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:55,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:55,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:39:55,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:55,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:39:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:39:55,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103457754] [2020-10-14 17:39:55,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:39:55,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:39:55,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72773520] [2020-10-14 17:39:55,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:39:55,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:55,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:39:55,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:39:55,717 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2020-10-14 17:39:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:55,960 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-14 17:39:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:39:55,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 17:39:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:55,961 INFO L225 Difference]: With dead ends: 39 [2020-10-14 17:39:55,961 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 17:39:55,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:39:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 17:39:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-14 17:39:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 17:39:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-14 17:39:55,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2020-10-14 17:39:55,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:55,968 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-14 17:39:55,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:39:55,968 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-14 17:39:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 17:39:55,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:55,970 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:55,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:39:55,970 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1524189611, now seen corresponding path program 7 times [2020-10-14 17:39:55,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:55,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721884745] [2020-10-14 17:39:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:55,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:56,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:56,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:56,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:56,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:56,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:58,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:58,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 17:39:58,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:39:58,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2059 [2020-10-14 17:39:58,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:58,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:39:58,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:39:58,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 17:39:58,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:58,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:39:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:58,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:58,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:39:58,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:39:58,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:39:58,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:39:58,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:39:58,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:39:58,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:39:58,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:39:58,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:39:58,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:39:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:39:58,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721884745] [2020-10-14 17:39:58,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:39:58,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:39:58,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849368244] [2020-10-14 17:39:58,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:39:58,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:39:58,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:39:58,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:39:58,981 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 22 states. [2020-10-14 17:39:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:39:59,584 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-10-14 17:39:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:39:59,585 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2020-10-14 17:39:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:39:59,586 INFO L225 Difference]: With dead ends: 51 [2020-10-14 17:39:59,586 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 17:39:59,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:39:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 17:39:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-14 17:39:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 17:39:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-14 17:39:59,593 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2020-10-14 17:39:59,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:39:59,594 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-14 17:39:59,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:39:59,594 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-14 17:39:59,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 17:39:59,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:39:59,595 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:39:59,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:39:59,595 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:39:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:39:59,596 INFO L82 PathProgramCache]: Analyzing trace with hash 854783251, now seen corresponding path program 8 times [2020-10-14 17:39:59,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:39:59,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598539697] [2020-10-14 17:39:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:39:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:39:59,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:39:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:00,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:00,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 17:40:00,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:00,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-14 17:40:00,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:00,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:40:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:00,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:40:00,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:00,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:00,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:00,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:00,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:00,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:00,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:00,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:00,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:00,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:00,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:00,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598539697] [2020-10-14 17:40:00,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:00,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:40:00,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896988339] [2020-10-14 17:40:00,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:40:00,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:00,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:40:00,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:40:00,231 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 14 states. [2020-10-14 17:40:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:00,540 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-14 17:40:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:40:00,541 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-14 17:40:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:00,542 INFO L225 Difference]: With dead ends: 62 [2020-10-14 17:40:00,542 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 17:40:00,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:40:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 17:40:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-10-14 17:40:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 17:40:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-14 17:40:00,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 34 [2020-10-14 17:40:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:00,551 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-14 17:40:00,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:40:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-14 17:40:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 17:40:00,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:00,553 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:00,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:40:00,553 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:00,554 INFO L82 PathProgramCache]: Analyzing trace with hash -576801453, now seen corresponding path program 9 times [2020-10-14 17:40:00,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:00,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138864070] [2020-10-14 17:40:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:00,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:00,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:01,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:01,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 17:40:01,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:01,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-14 17:40:01,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:01,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:01,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:40:01,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:01,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:40:01,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:01,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:01,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:01,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:01,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:01,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:01,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:01,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:01,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:01,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:01,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:01,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:01,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:01,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138864070] [2020-10-14 17:40:01,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:01,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:40:01,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830784777] [2020-10-14 17:40:01,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:40:01,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:40:01,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:40:01,259 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 14 states. [2020-10-14 17:40:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:01,653 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-14 17:40:01,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:40:01,654 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-14 17:40:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:01,655 INFO L225 Difference]: With dead ends: 43 [2020-10-14 17:40:01,655 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 17:40:01,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:40:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 17:40:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-14 17:40:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 17:40:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-14 17:40:01,667 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2020-10-14 17:40:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:01,668 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-14 17:40:01,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:40:01,668 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-14 17:40:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 17:40:01,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:01,669 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:01,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:40:01,670 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:01,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:01,670 INFO L82 PathProgramCache]: Analyzing trace with hash 761736337, now seen corresponding path program 10 times [2020-10-14 17:40:01,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:01,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485622742] [2020-10-14 17:40:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:01,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:01,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:02,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:03,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:03,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:03,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:04,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:04,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 17:40:04,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:40:04,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2666 [2020-10-14 17:40:04,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:04,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:04,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:40:04,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:04,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 17:40:04,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:05,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:05,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:05,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:05,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:05,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:05,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:05,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:05,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:05,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:05,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:05,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:05,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:05,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485622742] [2020-10-14 17:40:05,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:05,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:40:05,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115810547] [2020-10-14 17:40:05,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:40:05,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:05,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:40:05,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:40:05,319 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 26 states. [2020-10-14 17:40:06,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:06,142 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-14 17:40:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:40:06,145 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2020-10-14 17:40:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:06,146 INFO L225 Difference]: With dead ends: 57 [2020-10-14 17:40:06,146 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 17:40:06,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:40:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 17:40:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-10-14 17:40:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 17:40:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-14 17:40:06,163 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2020-10-14 17:40:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:06,166 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-14 17:40:06,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:40:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-14 17:40:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 17:40:06,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:06,167 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:06,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:40:06,168 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:06,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1393636273, now seen corresponding path program 11 times [2020-10-14 17:40:06,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:06,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886095116] [2020-10-14 17:40:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:06,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:06,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:06,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:06,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 17:40:06,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:06,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-14 17:40:06,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:06,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:40:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:40:06,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:06,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:06,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:06,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:06,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:06,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:06,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:06,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:06,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:06,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:06,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:06,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886095116] [2020-10-14 17:40:06,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:06,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:40:06,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250755764] [2020-10-14 17:40:06,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:40:06,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:06,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:40:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:40:06,702 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 16 states. [2020-10-14 17:40:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:06,997 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-14 17:40:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:40:06,997 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 17:40:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:06,998 INFO L225 Difference]: With dead ends: 68 [2020-10-14 17:40:06,998 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 17:40:06,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:40:07,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 17:40:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-10-14 17:40:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 17:40:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-14 17:40:07,006 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 38 [2020-10-14 17:40:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:07,006 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-14 17:40:07,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:40:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-14 17:40:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 17:40:07,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:07,007 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:07,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:40:07,007 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:07,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1537965199, now seen corresponding path program 12 times [2020-10-14 17:40:07,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:07,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533695310] [2020-10-14 17:40:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:07,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:07,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:07,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:07,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 17:40:07,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:07,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-14 17:40:07,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:07,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:07,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:40:07,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:07,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:40:07,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:07,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:07,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:07,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:07,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:07,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:07,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:07,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:07,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:07,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:07,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533695310] [2020-10-14 17:40:07,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:07,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:40:07,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898785455] [2020-10-14 17:40:07,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:40:07,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:40:07,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:40:07,533 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2020-10-14 17:40:07,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:07,906 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-14 17:40:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:40:07,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 17:40:07,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:07,907 INFO L225 Difference]: With dead ends: 47 [2020-10-14 17:40:07,907 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 17:40:07,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:40:07,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 17:40:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-14 17:40:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 17:40:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-14 17:40:07,915 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-10-14 17:40:07,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:07,916 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-14 17:40:07,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:40:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-14 17:40:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 17:40:07,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:07,917 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:07,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:40:07,917 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:07,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1532957901, now seen corresponding path program 13 times [2020-10-14 17:40:07,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:07,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226231528] [2020-10-14 17:40:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:07,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:07,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:08,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:09,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:10,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:10,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:10,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:11,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:11,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:11,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 17:40:11,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:40:11,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3263 [2020-10-14 17:40:11,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:11,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:11,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:40:11,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:11,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 17:40:11,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:12,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:12,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:12,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:12,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:12,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:12,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:12,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:12,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:12,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:12,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:12,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:12,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226231528] [2020-10-14 17:40:12,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:12,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:40:12,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320631830] [2020-10-14 17:40:12,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:40:12,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:12,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:40:12,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:40:12,508 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 30 states. [2020-10-14 17:40:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:13,610 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-14 17:40:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:40:13,611 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 40 [2020-10-14 17:40:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:13,612 INFO L225 Difference]: With dead ends: 63 [2020-10-14 17:40:13,612 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 17:40:13,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=981, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:40:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 17:40:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-14 17:40:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 17:40:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-14 17:40:13,621 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2020-10-14 17:40:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:13,621 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-14 17:40:13,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:40:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-14 17:40:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 17:40:13,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:13,622 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:13,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:40:13,623 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:13,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:13,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1015911819, now seen corresponding path program 14 times [2020-10-14 17:40:13,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:13,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699773412] [2020-10-14 17:40:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:13,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:13,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:14,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:14,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 17:40:14,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:14,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-14 17:40:14,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:14,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:14,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:40:14,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:14,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:40:14,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:14,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:14,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:14,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:14,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:14,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:14,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:14,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:14,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:14,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:14,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:14,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:14,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:14,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699773412] [2020-10-14 17:40:14,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:14,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:40:14,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571922471] [2020-10-14 17:40:14,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:40:14,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:14,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:40:14,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:40:14,277 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 18 states. [2020-10-14 17:40:14,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:14,593 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-14 17:40:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:40:14,594 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-14 17:40:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:14,595 INFO L225 Difference]: With dead ends: 74 [2020-10-14 17:40:14,595 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 17:40:14,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:40:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 17:40:14,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-14 17:40:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 17:40:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 17:40:14,602 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 42 [2020-10-14 17:40:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:14,602 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 17:40:14,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:40:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 17:40:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 17:40:14,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:14,603 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:14,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:40:14,604 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:14,604 INFO L82 PathProgramCache]: Analyzing trace with hash 786380235, now seen corresponding path program 15 times [2020-10-14 17:40:14,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:14,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619414194] [2020-10-14 17:40:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:14,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:14,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:15,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:15,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 17:40:15,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:15,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-14 17:40:15,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:15,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:15,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:40:15,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:15,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:40:15,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:15,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:15,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:15,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:15,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:15,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:15,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:40:15,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:15,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:15,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:15,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:15,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:15,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619414194] [2020-10-14 17:40:15,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:15,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:40:15,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874713680] [2020-10-14 17:40:15,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:40:15,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:40:15,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:40:15,216 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 18 states. [2020-10-14 17:40:15,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:15,750 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-14 17:40:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:40:15,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-14 17:40:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:15,752 INFO L225 Difference]: With dead ends: 51 [2020-10-14 17:40:15,752 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 17:40:15,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:40:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 17:40:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 17:40:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 17:40:15,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-14 17:40:15,768 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2020-10-14 17:40:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:15,768 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-14 17:40:15,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:40:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-14 17:40:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 17:40:15,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:15,770 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:15,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:40:15,771 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:15,771 INFO L82 PathProgramCache]: Analyzing trace with hash 814313225, now seen corresponding path program 16 times [2020-10-14 17:40:15,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:15,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879646998] [2020-10-14 17:40:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:15,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:15,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:16,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:16,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:16,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:17,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:18,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:18,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:18,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:19,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:19,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 17:40:19,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:40:19,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3278 [2020-10-14 17:40:19,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:19,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:19,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:40:19,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:19,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 17:40:19,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:21,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:21,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:21,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:21,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:21,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:21,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:21,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:21,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:21,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:21,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:21,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:21,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:21,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879646998] [2020-10-14 17:40:21,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:21,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:40:21,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330973669] [2020-10-14 17:40:21,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:40:21,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:21,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:40:21,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:40:21,173 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 34 states. [2020-10-14 17:40:22,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:22,464 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-10-14 17:40:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:40:22,465 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 44 [2020-10-14 17:40:22,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:22,466 INFO L225 Difference]: With dead ends: 69 [2020-10-14 17:40:22,466 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 17:40:22,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:40:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 17:40:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2020-10-14 17:40:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 17:40:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-14 17:40:22,487 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-10-14 17:40:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:22,487 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-14 17:40:22,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:40:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-14 17:40:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 17:40:22,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:22,488 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:22,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:40:22,489 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1888112839, now seen corresponding path program 17 times [2020-10-14 17:40:22,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:22,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759699265] [2020-10-14 17:40:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:22,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:22,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:22,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:22,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 17:40:22,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:22,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-14 17:40:22,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:22,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:40:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:40:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:23,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:23,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:23,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:23,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:23,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:23,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:40:23,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:23,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:23,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:23,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759699265] [2020-10-14 17:40:23,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:23,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:40:23,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368246194] [2020-10-14 17:40:23,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:40:23,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:23,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:40:23,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:40:23,087 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 20 states. [2020-10-14 17:40:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:23,501 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-14 17:40:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:40:23,501 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-14 17:40:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:23,502 INFO L225 Difference]: With dead ends: 80 [2020-10-14 17:40:23,502 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 17:40:23,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:40:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 17:40:23,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2020-10-14 17:40:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 17:40:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-14 17:40:23,512 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 46 [2020-10-14 17:40:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:23,512 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-14 17:40:23,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:40:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-14 17:40:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 17:40:23,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:23,513 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:23,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:40:23,513 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:23,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:23,514 INFO L82 PathProgramCache]: Analyzing trace with hash 351592711, now seen corresponding path program 18 times [2020-10-14 17:40:23,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:23,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968982095] [2020-10-14 17:40:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:23,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:23,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:23,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:23,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 17:40:23,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:23,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-14 17:40:23,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:23,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:23,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:40:23,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:23,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:40:23,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:24,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:24,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:24,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:24,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:24,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:24,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:24,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:24,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:24,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:24,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:24,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:24,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:24,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968982095] [2020-10-14 17:40:24,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:24,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:40:24,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284439817] [2020-10-14 17:40:24,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:40:24,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:24,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:40:24,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:40:24,166 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 20 states. [2020-10-14 17:40:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:24,768 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-14 17:40:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:40:24,769 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-14 17:40:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:24,769 INFO L225 Difference]: With dead ends: 55 [2020-10-14 17:40:24,770 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 17:40:24,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:40:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 17:40:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-14 17:40:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 17:40:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-14 17:40:24,778 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-10-14 17:40:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:24,778 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-14 17:40:24,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:40:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-14 17:40:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 17:40:24,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:24,779 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:24,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:40:24,780 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:24,780 INFO L82 PathProgramCache]: Analyzing trace with hash -404669627, now seen corresponding path program 19 times [2020-10-14 17:40:24,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:24,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430818665] [2020-10-14 17:40:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:24,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:24,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:25,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:25,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:26,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:26,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:26,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:27,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:27,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:27,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:28,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:28,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 17:40:28,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:40:28,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3489 [2020-10-14 17:40:28,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:28,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:28,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:40:28,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:28,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 17:40:28,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:30,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:30,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:30,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:30,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:30,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:30,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:30,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:30,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:30,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:30,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:30,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:30,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:30,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430818665] [2020-10-14 17:40:30,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:30,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 17:40:30,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886193933] [2020-10-14 17:40:30,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 17:40:30,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:30,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 17:40:30,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:40:30,973 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 38 states. [2020-10-14 17:40:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:32,739 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2020-10-14 17:40:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:40:32,740 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 48 [2020-10-14 17:40:32,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:32,741 INFO L225 Difference]: With dead ends: 75 [2020-10-14 17:40:32,741 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 17:40:32,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=91, Invalid=1549, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 17:40:32,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 17:40:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2020-10-14 17:40:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 17:40:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-14 17:40:32,749 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-10-14 17:40:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:32,750 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-14 17:40:32,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 17:40:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-14 17:40:32,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 17:40:32,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:32,751 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:32,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:40:32,751 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:32,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1323303421, now seen corresponding path program 20 times [2020-10-14 17:40:32,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:32,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201738450] [2020-10-14 17:40:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:32,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:33,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:33,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 17:40:33,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:33,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-14 17:40:33,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:33,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:40:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:33,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:40:33,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:33,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:33,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:33,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:33,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:33,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:33,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:33,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:33,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:33,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:33,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:33,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:33,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:40:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:33,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201738450] [2020-10-14 17:40:33,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:33,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:40:33,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427301242] [2020-10-14 17:40:33,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:40:33,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:33,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:40:33,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:40:33,420 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 22 states. [2020-10-14 17:40:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:33,832 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-14 17:40:33,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:40:33,834 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-14 17:40:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:33,835 INFO L225 Difference]: With dead ends: 86 [2020-10-14 17:40:33,835 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 17:40:33,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:40:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 17:40:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2020-10-14 17:40:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 17:40:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-14 17:40:33,843 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 50 [2020-10-14 17:40:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:33,843 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-14 17:40:33,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:40:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-14 17:40:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 17:40:33,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:33,844 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:33,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:40:33,845 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:33,845 INFO L82 PathProgramCache]: Analyzing trace with hash -450396605, now seen corresponding path program 21 times [2020-10-14 17:40:33,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:33,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062433814] [2020-10-14 17:40:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:33,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:33,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:34,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:34,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 17:40:34,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:34,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-14 17:40:34,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:34,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:34,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:40:34,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:34,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:40:34,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:34,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:34,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:34,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:34,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:34,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:34,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:34,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:34,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:34,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:34,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:34,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:34,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:34,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062433814] [2020-10-14 17:40:34,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:34,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:40:34,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457813321] [2020-10-14 17:40:34,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:40:34,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:34,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:40:34,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:40:34,485 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 22 states. [2020-10-14 17:40:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:35,240 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-14 17:40:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:40:35,240 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-14 17:40:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:35,242 INFO L225 Difference]: With dead ends: 59 [2020-10-14 17:40:35,242 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 17:40:35,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 17:40:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 17:40:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-14 17:40:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 17:40:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-14 17:40:35,250 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 50 [2020-10-14 17:40:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:35,250 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-14 17:40:35,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:40:35,251 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-14 17:40:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 17:40:35,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:35,251 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:35,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:40:35,252 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:35,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1977710977, now seen corresponding path program 22 times [2020-10-14 17:40:35,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:35,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491553275] [2020-10-14 17:40:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:35,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:35,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:35,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:35,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:36,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:36,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:36,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:37,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:37,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:38,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:39,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:39,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:39,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 17:40:39,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 17:40:39,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4008 [2020-10-14 17:40:39,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:39,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:39,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 17:40:39,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:39,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 17:40:39,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:42,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:42,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:42,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:42,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:42,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:42,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:42,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:42,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:42,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:42,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:42,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:42,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491553275] [2020-10-14 17:40:42,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:42,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 17:40:42,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061045946] [2020-10-14 17:40:42,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 17:40:42,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:42,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 17:40:42,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 17:40:42,196 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 41 states. [2020-10-14 17:40:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:44,261 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-14 17:40:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 17:40:44,262 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 52 [2020-10-14 17:40:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:44,263 INFO L225 Difference]: With dead ends: 81 [2020-10-14 17:40:44,263 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 17:40:44,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=95, Invalid=1797, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 17:40:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 17:40:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-10-14 17:40:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 17:40:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-14 17:40:44,272 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-10-14 17:40:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:44,272 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-14 17:40:44,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 17:40:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-14 17:40:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 17:40:44,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:44,273 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:44,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:40:44,273 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:44,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:44,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1073111745, now seen corresponding path program 23 times [2020-10-14 17:40:44,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:44,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574876257] [2020-10-14 17:40:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:44,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:44,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:44,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:44,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 17:40:44,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:44,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-14 17:40:44,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:44,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:44,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:40:44,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:44,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:40:44,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:45,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:45,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:45,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:45,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:45,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:45,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:45,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:45,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:45,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:45,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:45,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:45,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:45,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574876257] [2020-10-14 17:40:45,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:45,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:40:45,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025519015] [2020-10-14 17:40:45,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:40:45,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:45,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:40:45,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:40:45,028 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 24 states. [2020-10-14 17:40:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:45,544 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2020-10-14 17:40:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:40:45,544 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-14 17:40:45,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:45,546 INFO L225 Difference]: With dead ends: 92 [2020-10-14 17:40:45,546 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 17:40:45,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:40:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 17:40:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2020-10-14 17:40:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 17:40:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-14 17:40:45,555 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 54 [2020-10-14 17:40:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:45,555 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-14 17:40:45,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:40:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-14 17:40:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 17:40:45,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:45,556 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:45,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:40:45,556 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:45,557 INFO L82 PathProgramCache]: Analyzing trace with hash 271715711, now seen corresponding path program 24 times [2020-10-14 17:40:45,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:45,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517084250] [2020-10-14 17:40:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:45,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:45,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:45,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:45,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 17:40:45,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:45,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-14 17:40:45,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:45,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:45,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:40:45,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:45,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:40:45,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:46,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:46,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:46,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:46,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:46,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:46,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:40:46,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:46,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:46,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:46,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:46,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:46,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:46,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517084250] [2020-10-14 17:40:46,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:46,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:40:46,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528667995] [2020-10-14 17:40:46,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:40:46,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:40:46,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:40:46,291 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 24 states. [2020-10-14 17:40:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:47,086 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-14 17:40:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:40:47,087 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-14 17:40:47,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:47,088 INFO L225 Difference]: With dead ends: 63 [2020-10-14 17:40:47,088 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 17:40:47,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=455, Invalid=1525, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 17:40:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 17:40:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-14 17:40:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 17:40:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 17:40:47,097 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-10-14 17:40:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:47,097 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 17:40:47,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:40:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 17:40:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 17:40:47,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:47,098 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:47,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:40:47,098 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash 142944701, now seen corresponding path program 25 times [2020-10-14 17:40:47,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:47,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538436715] [2020-10-14 17:40:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:47,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:47,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:47,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:48,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:48,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:49,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:49,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:50,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:50,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:51,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:51,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:52,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:52,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 17:40:52,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 17:40:52,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:40:52,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:52,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:52,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 17:40:52,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:40:52,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 17:40:52,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:56,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:40:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:56,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:56,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:56,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:40:56,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:40:56,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:40:56,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:56,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:40:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:40:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:40:56,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:40:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:40:56,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538436715] [2020-10-14 17:40:56,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:40:56,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 17:40:56,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858067962] [2020-10-14 17:40:56,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 17:40:56,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:40:56,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 17:40:56,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 17:40:56,765 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 46 states. [2020-10-14 17:40:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:40:59,188 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-10-14 17:40:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 17:40:59,188 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 56 [2020-10-14 17:40:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:40:59,189 INFO L225 Difference]: With dead ends: 87 [2020-10-14 17:40:59,190 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 17:40:59,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=104, Invalid=2152, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 17:40:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 17:40:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-14 17:40:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 17:40:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-14 17:40:59,201 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-10-14 17:40:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:40:59,201 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-14 17:40:59,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 17:40:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-14 17:40:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 17:40:59,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:40:59,202 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:40:59,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:40:59,202 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:40:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:40:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash 948055675, now seen corresponding path program 26 times [2020-10-14 17:40:59,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:40:59,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639424610] [2020-10-14 17:40:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:40:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:40:59,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:59,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:40:59,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:40:59,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 17:40:59,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:40:59,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-14 17:40:59,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:40:59,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:40:59,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:40:59,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:40:59,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:40:59,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:00,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:00,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:00,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:00,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:00,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:00,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:00,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:00,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:00,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:00,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:41:00,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639424610] [2020-10-14 17:41:00,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:00,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:41:00,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640887427] [2020-10-14 17:41:00,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:41:00,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:00,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:41:00,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:41:00,065 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 26 states. [2020-10-14 17:41:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:00,640 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-14 17:41:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:41:00,641 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-14 17:41:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:00,642 INFO L225 Difference]: With dead ends: 98 [2020-10-14 17:41:00,642 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 17:41:00,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:41:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 17:41:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-10-14 17:41:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 17:41:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-14 17:41:00,651 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 58 [2020-10-14 17:41:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:00,651 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-14 17:41:00,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:41:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-14 17:41:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 17:41:00,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:00,652 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:00,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:41:00,652 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash 542084795, now seen corresponding path program 27 times [2020-10-14 17:41:00,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:00,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352385035] [2020-10-14 17:41:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:00,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:00,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:01,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:01,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 17:41:01,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:41:01,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-14 17:41:01,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:01,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:01,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:41:01,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:41:01,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:41:01,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:01,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:01,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:01,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:01,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:01,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:01,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:41:01,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:01,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:01,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:01,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:01,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:01,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:41:01,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352385035] [2020-10-14 17:41:01,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:01,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:41:01,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400145876] [2020-10-14 17:41:01,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:41:01,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:01,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:41:01,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:41:01,546 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 26 states. [2020-10-14 17:41:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:02,656 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-14 17:41:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:41:02,657 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-14 17:41:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:02,659 INFO L225 Difference]: With dead ends: 67 [2020-10-14 17:41:02,659 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 17:41:02,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=538, Invalid=1814, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 17:41:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 17:41:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-14 17:41:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 17:41:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 17:41:02,670 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2020-10-14 17:41:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:02,670 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 17:41:02,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:41:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 17:41:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 17:41:02,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:02,671 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:02,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:41:02,671 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:02,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:02,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2025370631, now seen corresponding path program 28 times [2020-10-14 17:41:02,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:02,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711298135] [2020-10-14 17:41:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:02,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:02,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:03,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:04,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:05,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:06,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:06,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:07,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:07,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:07,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:07,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 17:41:07,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:41:07,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5189 [2020-10-14 17:41:07,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:07,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:07,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 17:41:07,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:41:07,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 17:41:07,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:13,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:13,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:13,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:13,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:13,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:13,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:13,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:13,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:13,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:41:13,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711298135] [2020-10-14 17:41:13,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:13,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 17:41:13,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844304784] [2020-10-14 17:41:13,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 17:41:13,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 17:41:13,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2349, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 17:41:13,561 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 50 states. [2020-10-14 17:41:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:17,322 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-10-14 17:41:17,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 17:41:17,323 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 60 [2020-10-14 17:41:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:17,324 INFO L225 Difference]: With dead ends: 93 [2020-10-14 17:41:17,324 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 17:41:17,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=115, Invalid=2641, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 17:41:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 17:41:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2020-10-14 17:41:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 17:41:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-14 17:41:17,343 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-10-14 17:41:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:17,344 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-14 17:41:17,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 17:41:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-14 17:41:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 17:41:17,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:17,345 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:17,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:41:17,346 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:17,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:17,348 INFO L82 PathProgramCache]: Analyzing trace with hash 256160183, now seen corresponding path program 29 times [2020-10-14 17:41:17,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:17,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28275949] [2020-10-14 17:41:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:17,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:17,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:18,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:18,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 17:41:18,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:41:18,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 926 [2020-10-14 17:41:18,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:18,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:18,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:41:18,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:41:18,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:41:18,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:18,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:18,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:18,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:18,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:18,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:18,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:18,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:18,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:18,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:41:18,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28275949] [2020-10-14 17:41:18,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:18,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:41:18,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035369959] [2020-10-14 17:41:18,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:41:18,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:18,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:41:18,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:41:18,802 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 28 states. [2020-10-14 17:41:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:19,485 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-14 17:41:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:41:19,486 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-14 17:41:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:19,487 INFO L225 Difference]: With dead ends: 104 [2020-10-14 17:41:19,487 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 17:41:19,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 17:41:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 17:41:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-10-14 17:41:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 17:41:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-14 17:41:19,498 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 62 [2020-10-14 17:41:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:19,499 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-14 17:41:19,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:41:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-14 17:41:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 17:41:19,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:19,499 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:19,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:41:19,500 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash 960168439, now seen corresponding path program 30 times [2020-10-14 17:41:19,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:19,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485887497] [2020-10-14 17:41:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:19,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:19,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:19,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:19,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 17:41:19,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:41:19,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-14 17:41:19,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:19,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:19,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:41:19,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:41:19,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:41:19,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:20,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:20,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:20,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:20,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:20,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:20,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:41:20,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:20,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:20,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:20,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:20,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:20,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:41:20,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485887497] [2020-10-14 17:41:20,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:20,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:41:20,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585606010] [2020-10-14 17:41:20,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:41:20,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:20,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:41:20,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:41:20,460 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 28 states. [2020-10-14 17:41:21,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:21,542 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-14 17:41:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 17:41:21,547 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-14 17:41:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:21,548 INFO L225 Difference]: With dead ends: 71 [2020-10-14 17:41:21,548 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 17:41:21,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=628, Invalid=2128, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 17:41:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 17:41:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-14 17:41:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 17:41:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-14 17:41:21,558 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2020-10-14 17:41:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:21,558 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-14 17:41:21,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:41:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-14 17:41:21,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 17:41:21,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:21,559 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:21,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:41:21,559 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:21,559 INFO L82 PathProgramCache]: Analyzing trace with hash 321052725, now seen corresponding path program 31 times [2020-10-14 17:41:21,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:21,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66177083] [2020-10-14 17:41:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:21,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:21,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:22,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:22,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:23,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:24,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:25,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:26,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:26,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:26,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 17:41:26,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:41:26,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 17:41:26,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:26,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 17:41:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:41:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 17:41:26,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:28,801 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-14 17:41:29,120 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-14 17:41:34,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:34,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:34,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:34,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:34,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:34,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:34,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:34,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:34,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:41:34,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66177083] [2020-10-14 17:41:34,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:34,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 17:41:34,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830267497] [2020-10-14 17:41:34,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 17:41:34,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:34,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 17:41:34,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2958, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 17:41:34,863 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 56 states. [2020-10-14 17:41:41,204 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 208 DAG size of output: 195 [2020-10-14 17:41:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:47,142 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-14 17:41:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 17:41:47,144 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 64 [2020-10-14 17:41:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:47,144 INFO L225 Difference]: With dead ends: 100 [2020-10-14 17:41:47,145 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 17:41:47,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=302, Invalid=6670, Unknown=0, NotChecked=0, Total=6972 [2020-10-14 17:41:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 17:41:47,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 71. [2020-10-14 17:41:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 17:41:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-14 17:41:47,158 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-10-14 17:41:47,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:47,158 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-14 17:41:47,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 17:41:47,158 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-14 17:41:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 17:41:47,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:47,159 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:47,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:41:47,160 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:47,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:47,160 INFO L82 PathProgramCache]: Analyzing trace with hash 311174899, now seen corresponding path program 32 times [2020-10-14 17:41:47,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:47,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622375993] [2020-10-14 17:41:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:47,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:47,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:47,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:47,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 17:41:47,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:41:47,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-14 17:41:47,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:47,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:47,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:41:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:41:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:41:47,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:48,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:48,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:48,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:48,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:48,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:48,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:48,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:48,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:48,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:48,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:48,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:48,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:41:48,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622375993] [2020-10-14 17:41:48,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:48,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:41:48,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024181043] [2020-10-14 17:41:48,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:41:48,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:48,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:41:48,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:41:48,554 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 30 states. [2020-10-14 17:41:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:49,459 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2020-10-14 17:41:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:41:49,460 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-14 17:41:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:49,462 INFO L225 Difference]: With dead ends: 110 [2020-10-14 17:41:49,462 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 17:41:49,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=438, Invalid=1454, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 17:41:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 17:41:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-10-14 17:41:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 17:41:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-14 17:41:49,473 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 66 [2020-10-14 17:41:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:49,474 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-14 17:41:49,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:41:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-14 17:41:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 17:41:49,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:49,475 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:49,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:41:49,475 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:49,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:49,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1741723853, now seen corresponding path program 33 times [2020-10-14 17:41:49,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:49,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815216524] [2020-10-14 17:41:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:49,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:49,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:49,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:49,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 17:41:49,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:41:49,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-14 17:41:49,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:49,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:49,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:41:49,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:41:49,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:41:49,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:50,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:41:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:50,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:50,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:50,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:41:50,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:41:50,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:41:50,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:50,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:50,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:41:50,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:41:50,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:41:50,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:41:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:41:50,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815216524] [2020-10-14 17:41:50,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:41:50,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:41:50,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293538511] [2020-10-14 17:41:50,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:41:50,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:41:50,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:41:50,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:41:50,683 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 30 states. [2020-10-14 17:41:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:41:52,431 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-14 17:41:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 17:41:52,433 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-14 17:41:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:41:52,434 INFO L225 Difference]: With dead ends: 75 [2020-10-14 17:41:52,434 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 17:41:52,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=725, Invalid=2467, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 17:41:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 17:41:52,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-14 17:41:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 17:41:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-14 17:41:52,447 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 66 [2020-10-14 17:41:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:41:52,447 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-14 17:41:52,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:41:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-14 17:41:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 17:41:52,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:41:52,448 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:41:52,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:41:52,448 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:41:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:41:52,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2037193103, now seen corresponding path program 34 times [2020-10-14 17:41:52,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:41:52,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550440268] [2020-10-14 17:41:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:41:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:41:52,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:52,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:53,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:54,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:55,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:57,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:41:57,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:41:57,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 17:41:57,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:41:57,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-14 17:41:57,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:41:57,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:41:57,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 17:41:57,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:41:57,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 17:41:57,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:07,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:07,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:07,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:07,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:07,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:42:07,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:07,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:07,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:42:07,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550440268] [2020-10-14 17:42:07,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:07,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 17:42:07,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382854343] [2020-10-14 17:42:07,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 17:42:07,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 17:42:07,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 17:42:07,220 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 58 states. [2020-10-14 17:42:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:14,299 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2020-10-14 17:42:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 17:42:14,301 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 68 [2020-10-14 17:42:14,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:14,303 INFO L225 Difference]: With dead ends: 105 [2020-10-14 17:42:14,303 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 17:42:14,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=128, Invalid=3412, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 17:42:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 17:42:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2020-10-14 17:42:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 17:42:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-14 17:42:14,316 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-10-14 17:42:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:14,317 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-14 17:42:14,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 17:42:14,317 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-14 17:42:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 17:42:14,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:14,318 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:14,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:42:14,318 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:14,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:14,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1779666479, now seen corresponding path program 35 times [2020-10-14 17:42:14,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:14,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230059268] [2020-10-14 17:42:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:14,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:14,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:15,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:15,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 17:42:15,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:42:15,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-10-14 17:42:15,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:15,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:15,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:42:15,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:42:15,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:42:15,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:15,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:16,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:16,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:16,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:16,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:16,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:16,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:16,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:16,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:42:16,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230059268] [2020-10-14 17:42:16,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:16,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:42:16,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434391958] [2020-10-14 17:42:16,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:42:16,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:16,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:42:16,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:42:16,009 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 32 states. [2020-10-14 17:42:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:17,246 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-14 17:42:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:42:17,248 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-14 17:42:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:17,250 INFO L225 Difference]: With dead ends: 116 [2020-10-14 17:42:17,250 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 17:42:17,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=499, Invalid=1663, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 17:42:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 17:42:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2020-10-14 17:42:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 17:42:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-14 17:42:17,265 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 70 [2020-10-14 17:42:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:17,265 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-14 17:42:17,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:42:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-14 17:42:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 17:42:17,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:17,267 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:17,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:42:17,267 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:17,267 INFO L82 PathProgramCache]: Analyzing trace with hash 333954671, now seen corresponding path program 36 times [2020-10-14 17:42:17,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:17,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806731232] [2020-10-14 17:42:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:17,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:17,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:17,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:17,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 17:42:17,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:42:17,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-14 17:42:17,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:17,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:42:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:42:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:42:17,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:18,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:18,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:18,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:18,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:18,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:18,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:18,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:18,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:18,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:18,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:18,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:18,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:42:18,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806731232] [2020-10-14 17:42:18,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:18,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:42:18,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150781349] [2020-10-14 17:42:18,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:42:18,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:42:18,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:42:18,779 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 32 states. [2020-10-14 17:42:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:21,418 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-14 17:42:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 17:42:21,421 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-14 17:42:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:21,422 INFO L225 Difference]: With dead ends: 79 [2020-10-14 17:42:21,422 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 17:42:21,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=829, Invalid=2831, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 17:42:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 17:42:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-14 17:42:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 17:42:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-14 17:42:21,441 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-10-14 17:42:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:21,442 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-14 17:42:21,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:42:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-14 17:42:21,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 17:42:21,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:21,443 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:21,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 17:42:21,443 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:21,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:21,444 INFO L82 PathProgramCache]: Analyzing trace with hash -174956883, now seen corresponding path program 37 times [2020-10-14 17:42:21,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:21,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030280840] [2020-10-14 17:42:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:21,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:21,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:22,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:22,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:23,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:24,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:24,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:25,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:26,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:26,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 17:42:26,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:42:26,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 17:42:26,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:26,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:26,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-14 17:42:26,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:42:26,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 17:42:26,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:30,429 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-14 17:42:40,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:40,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:40,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:40,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:40,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:40,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:42:40,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:40,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:40,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:40,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:40,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:40,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:42:40,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030280840] [2020-10-14 17:42:40,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:40,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 17:42:40,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383556239] [2020-10-14 17:42:40,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 17:42:40,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 17:42:40,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3657, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 17:42:40,325 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 62 states. [2020-10-14 17:42:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:51,589 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2020-10-14 17:42:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 17:42:51,593 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 72 [2020-10-14 17:42:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:51,594 INFO L225 Difference]: With dead ends: 111 [2020-10-14 17:42:51,594 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 17:42:51,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=139, Invalid=4021, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 17:42:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 17:42:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2020-10-14 17:42:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 17:42:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-14 17:42:51,612 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-10-14 17:42:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:51,613 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-14 17:42:51,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-14 17:42:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-14 17:42:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 17:42:51,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:51,614 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:51,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 17:42:51,614 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:51,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:51,614 INFO L82 PathProgramCache]: Analyzing trace with hash 387311467, now seen corresponding path program 38 times [2020-10-14 17:42:51,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:51,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237389596] [2020-10-14 17:42:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:51,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:51,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:52,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:52,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 17:42:52,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:42:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-10-14 17:42:52,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:52,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:42:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:42:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:42:52,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:53,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:53,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:53,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:53,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:53,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:53,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:53,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:53,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:53,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:53,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:53,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:53,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:42:53,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237389596] [2020-10-14 17:42:53,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:53,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:42:53,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528841399] [2020-10-14 17:42:53,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:42:53,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:42:53,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:42:53,985 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 34 states. [2020-10-14 17:42:55,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:42:55,752 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2020-10-14 17:42:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:42:55,755 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-14 17:42:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:42:55,757 INFO L225 Difference]: With dead ends: 122 [2020-10-14 17:42:55,757 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 17:42:55,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=564, Invalid=1886, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 17:42:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 17:42:55,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-10-14 17:42:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 17:42:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 17:42:55,774 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 74 [2020-10-14 17:42:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:42:55,774 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 17:42:55,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:42:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 17:42:55,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 17:42:55,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:42:55,775 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:42:55,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 17:42:55,775 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:42:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:42:55,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1667299413, now seen corresponding path program 39 times [2020-10-14 17:42:55,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:42:55,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917143582] [2020-10-14 17:42:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:42:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:55,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:55,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:56,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:56,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 17:42:56,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:42:56,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-14 17:42:56,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:56,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:56,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:42:56,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:42:56,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:42:56,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:57,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:42:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:42:57,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:42:57,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:42:57,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:42:57,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:42:57,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:42:57,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:42:57,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:42:57,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:42:57,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:42:57,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:42:57,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:42:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:42:57,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917143582] [2020-10-14 17:42:57,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:42:57,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:42:57,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915071987] [2020-10-14 17:42:57,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:42:57,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:42:57,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:42:57,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:42:57,877 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 34 states. [2020-10-14 17:43:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:01,097 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-14 17:43:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 17:43:01,100 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-14 17:43:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:01,102 INFO L225 Difference]: With dead ends: 83 [2020-10-14 17:43:01,102 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 17:43:01,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=940, Invalid=3220, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 17:43:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 17:43:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-14 17:43:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 17:43:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-14 17:43:01,120 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 74 [2020-10-14 17:43:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:01,120 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-14 17:43:01,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:43:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-14 17:43:01,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 17:43:01,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:01,121 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:43:01,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 17:43:01,121 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash 765217001, now seen corresponding path program 40 times [2020-10-14 17:43:01,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:01,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029880259] [2020-10-14 17:43:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:01,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:01,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:01,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:03,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:06,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:06,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 17:43:06,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:43:06,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:43:06,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:06,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:06,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-14 17:43:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:43:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 17:43:06,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:06,665 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-10-14 17:43:06,792 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2020-10-14 17:43:06,925 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-10-14 17:43:07,064 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-10-14 17:43:07,209 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-10-14 17:43:07,363 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-10-14 17:43:07,521 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-10-14 17:43:07,686 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-10-14 17:43:07,860 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-14 17:43:08,044 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-10-14 17:43:08,236 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-10-14 17:43:08,431 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-10-14 17:43:08,635 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-14 17:43:08,856 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-14 17:43:09,100 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-14 17:43:09,339 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-14 17:43:09,585 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-14 17:43:09,835 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-14 17:43:10,091 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-14 17:43:10,364 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-14 17:43:10,638 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-14 17:43:10,926 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-14 17:43:11,223 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-14 17:43:11,523 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-14 17:43:11,823 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-14 17:43:12,159 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-14 17:43:12,480 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-14 17:43:26,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:26,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:26,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:26,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:26,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:26,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:43:26,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:26,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:26,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:26,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:26,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:26,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:43:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:43:26,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029880259] [2020-10-14 17:43:26,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:43:26,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-14 17:43:26,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524448159] [2020-10-14 17:43:26,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-14 17:43:26,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:26,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-14 17:43:26,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4157, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 17:43:26,629 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 66 states.