/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:32:31,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:32:31,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:32:31,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:32:31,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:32:31,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:32:31,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:32:31,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:32:31,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:32:31,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:32:31,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:32:31,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:32:31,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:32:31,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:32:31,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:32:31,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:32:31,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:32:31,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:32:31,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:32:31,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:32:31,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:32:31,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:32:31,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:32:31,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:32:31,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:32:31,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:32:31,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:32:31,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:32:31,133 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 [2020-08-21 21:32:31,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:32:31,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:32:31,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:32:31,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:32:31,175 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:32:31,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:32:31,176 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:32:31,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:32:31,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:32:31,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:32:31,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:32:31,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:32:31,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:32:31,178 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:32:31,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:32:31,178 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:32:31,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:32:31,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:32:31,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:32:31,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:32:31,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:32:31,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:32:31,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:32:31,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:32:31,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:32:31,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:32:31,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:32:31,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:32:31,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:32:31,181 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:32:31,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:32:31,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:32:31,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:32:31,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:32:31,468 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:32:31,469 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-21 21:32:31,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/452e01ee7/64e1e1ee4abb4027891269aab6ff3299/FLAGbb432ab16 [2020-08-21 21:32:32,073 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:32:32,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-21 21:32:32,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/452e01ee7/64e1e1ee4abb4027891269aab6ff3299/FLAGbb432ab16 [2020-08-21 21:32:32,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/452e01ee7/64e1e1ee4abb4027891269aab6ff3299 [2020-08-21 21:32:32,365 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:32:32,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:32:32,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:32:32,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:32:32,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:32:32,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:32:32" (1/1) ... [2020-08-21 21:32:32,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625d319a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:32, skipping insertion in model container [2020-08-21 21:32:32,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:32:32" (1/1) ... [2020-08-21 21:32:32,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:32:32,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:32:33,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:32:33,151 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:32:33,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:32:33,547 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:32:33,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:33 WrapperNode [2020-08-21 21:32:33,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:32:33,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:32:33,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:32:33,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:32:33,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:33" (1/1) ... [2020-08-21 21:32:33,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:33" (1/1) ... [2020-08-21 21:32:33,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:33" (1/1) ... [2020-08-21 21:32:33,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:33" (1/1) ... [2020-08-21 21:32:33,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:33" (1/1) ... [2020-08-21 21:32:33,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:33" (1/1) ... [2020-08-21 21:32:33,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:33" (1/1) ... [2020-08-21 21:32:33,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:32:33,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:32:33,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:32:33,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:32:33,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:33" (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 [2020-08-21 21:32:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:32:33,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:32:33,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 21:32:33,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:32:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:32:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 21:32:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 21:32:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 21:32:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 21:32:33,744 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 21:32:33,744 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 21:32:33,744 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 21:32:33,745 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 21:32:33,745 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 21:32:33,745 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 21:32:33,746 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 21:32:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 21:32:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:32:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:32:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:32:35,291 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:32:35,292 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 21:32:35,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:32:35 BoogieIcfgContainer [2020-08-21 21:32:35,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:32:35,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:32:35,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:32:35,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:32:35,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:32:32" (1/3) ... [2020-08-21 21:32:35,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d99c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:32:35, skipping insertion in model container [2020-08-21 21:32:35,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:33" (2/3) ... [2020-08-21 21:32:35,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d99c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:32:35, skipping insertion in model container [2020-08-21 21:32:35,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:32:35" (3/3) ... [2020-08-21 21:32:35,308 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-21 21:32:35,321 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:32:35,329 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-08-21 21:32:35,343 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-08-21 21:32:35,374 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:32:35,374 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:32:35,374 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:32:35,374 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:32:35,375 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:32:35,375 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:32:35,375 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:32:35,375 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:32:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states. [2020-08-21 21:32:35,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 21:32:35,423 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:32:35,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:32:35,425 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:32:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:32:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash 604537660, now seen corresponding path program 1 times [2020-08-21 21:32:35,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:32:35,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460418081] [2020-08-21 21:32:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:32:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:36,378 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:32:36,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:32:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:32:36,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460418081] [2020-08-21 21:32:36,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:32:36,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:32:36,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780960094] [2020-08-21 21:32:36,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:32:36,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:32:36,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:32:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:32:36,482 INFO L87 Difference]: Start difference. First operand 412 states. Second operand 4 states. [2020-08-21 21:32:36,763 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-21 21:32:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:32:39,296 INFO L93 Difference]: Finished difference Result 754 states and 1320 transitions. [2020-08-21 21:32:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:32:39,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 21:32:39,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:32:39,318 INFO L225 Difference]: With dead ends: 754 [2020-08-21 21:32:39,319 INFO L226 Difference]: Without dead ends: 593 [2020-08-21 21:32:39,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:32:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-08-21 21:32:39,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2020-08-21 21:32:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-21 21:32:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 870 transitions. [2020-08-21 21:32:39,437 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 870 transitions. Word has length 146 [2020-08-21 21:32:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:32:39,438 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 870 transitions. [2020-08-21 21:32:39,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:32:39,438 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 870 transitions. [2020-08-21 21:32:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 21:32:39,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:32:39,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:32:39,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:32:39,444 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:32:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:32:39,444 INFO L82 PathProgramCache]: Analyzing trace with hash 694944860, now seen corresponding path program 1 times [2020-08-21 21:32:39,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:32:39,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812745954] [2020-08-21 21:32:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:32:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:39,825 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:32:39,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:32:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:32:39,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812745954] [2020-08-21 21:32:39,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:32:39,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:32:39,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379636561] [2020-08-21 21:32:39,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:32:39,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:32:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:32:39,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:32:39,871 INFO L87 Difference]: Start difference. First operand 591 states and 870 transitions. Second operand 4 states. [2020-08-21 21:32:40,133 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-21 21:32:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:32:42,167 INFO L93 Difference]: Finished difference Result 1190 states and 1805 transitions. [2020-08-21 21:32:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:32:42,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 21:32:42,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:32:42,175 INFO L225 Difference]: With dead ends: 1190 [2020-08-21 21:32:42,175 INFO L226 Difference]: Without dead ends: 961 [2020-08-21 21:32:42,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:32:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-08-21 21:32:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2020-08-21 21:32:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-08-21 21:32:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1434 transitions. [2020-08-21 21:32:42,231 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1434 transitions. Word has length 146 [2020-08-21 21:32:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:32:42,235 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1434 transitions. [2020-08-21 21:32:42,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:32:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1434 transitions. [2020-08-21 21:32:42,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 21:32:42,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:32:42,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:32:42,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:32:42,245 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:32:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:32:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1369993092, now seen corresponding path program 1 times [2020-08-21 21:32:42,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:32:42,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606204038] [2020-08-21 21:32:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:32:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:42,671 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:32:42,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:32:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:32:42,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606204038] [2020-08-21 21:32:42,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:32:42,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:32:42,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097752832] [2020-08-21 21:32:42,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:32:42,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:32:42,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:32:42,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:32:42,757 INFO L87 Difference]: Start difference. First operand 959 states and 1434 transitions. Second operand 4 states. [2020-08-21 21:32:43,070 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-21 21:32:45,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:32:45,407 INFO L93 Difference]: Finished difference Result 2090 states and 3210 transitions. [2020-08-21 21:32:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:32:45,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 21:32:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:32:45,423 INFO L225 Difference]: With dead ends: 2090 [2020-08-21 21:32:45,423 INFO L226 Difference]: Without dead ends: 1701 [2020-08-21 21:32:45,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:32:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2020-08-21 21:32:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2020-08-21 21:32:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-08-21 21:32:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2566 transitions. [2020-08-21 21:32:45,532 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2566 transitions. Word has length 146 [2020-08-21 21:32:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:32:45,533 INFO L479 AbstractCegarLoop]: Abstraction has 1699 states and 2566 transitions. [2020-08-21 21:32:45,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:32:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2566 transitions. [2020-08-21 21:32:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 21:32:45,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:32:45,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:32:45,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:32:45,544 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:32:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:32:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1370331716, now seen corresponding path program 1 times [2020-08-21 21:32:45,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:32:45,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742228070] [2020-08-21 21:32:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:32:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:46,131 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:32:46,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:32:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:32:46,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742228070] [2020-08-21 21:32:46,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:32:46,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:32:46,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9865983] [2020-08-21 21:32:46,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:32:46,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:32:46,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:32:46,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:32:46,198 INFO L87 Difference]: Start difference. First operand 1699 states and 2566 transitions. Second operand 5 states. [2020-08-21 21:32:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:32:49,278 INFO L93 Difference]: Finished difference Result 4967 states and 7485 transitions. [2020-08-21 21:32:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:32:49,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 21:32:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:32:49,302 INFO L225 Difference]: With dead ends: 4967 [2020-08-21 21:32:49,302 INFO L226 Difference]: Without dead ends: 3281 [2020-08-21 21:32:49,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:32:49,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-08-21 21:32:49,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3235. [2020-08-21 21:32:49,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2020-08-21 21:32:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4851 transitions. [2020-08-21 21:32:49,501 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4851 transitions. Word has length 146 [2020-08-21 21:32:49,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:32:49,502 INFO L479 AbstractCegarLoop]: Abstraction has 3235 states and 4851 transitions. [2020-08-21 21:32:49,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:32:49,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4851 transitions. [2020-08-21 21:32:49,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 21:32:49,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:32:49,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:32:49,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:32:49,514 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:32:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:32:49,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1648495204, now seen corresponding path program 1 times [2020-08-21 21:32:49,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:32:49,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121663960] [2020-08-21 21:32:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:32:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:49,932 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:32:49,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:32:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:32:50,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121663960] [2020-08-21 21:32:50,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:32:50,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:32:50,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611507745] [2020-08-21 21:32:50,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:32:50,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:32:50,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:32:50,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:32:50,003 INFO L87 Difference]: Start difference. First operand 3235 states and 4851 transitions. Second operand 4 states. [2020-08-21 21:32:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:32:52,828 INFO L93 Difference]: Finished difference Result 9659 states and 14483 transitions. [2020-08-21 21:32:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:32:52,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-21 21:32:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:32:52,873 INFO L225 Difference]: With dead ends: 9659 [2020-08-21 21:32:52,874 INFO L226 Difference]: Without dead ends: 6456 [2020-08-21 21:32:52,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:32:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2020-08-21 21:32:53,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 3237. [2020-08-21 21:32:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-08-21 21:32:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4853 transitions. [2020-08-21 21:32:53,286 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4853 transitions. Word has length 147 [2020-08-21 21:32:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:32:53,286 INFO L479 AbstractCegarLoop]: Abstraction has 3237 states and 4853 transitions. [2020-08-21 21:32:53,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:32:53,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4853 transitions. [2020-08-21 21:32:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-21 21:32:53,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:32:53,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:32:53,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:32:53,297 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:32:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:32:53,298 INFO L82 PathProgramCache]: Analyzing trace with hash 921116989, now seen corresponding path program 1 times [2020-08-21 21:32:53,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:32:53,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234149523] [2020-08-21 21:32:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:32:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:53,869 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:32:53,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:32:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:32:53,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234149523] [2020-08-21 21:32:53,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:32:53,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:32:53,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871629994] [2020-08-21 21:32:53,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:32:53,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:32:53,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:32:53,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:32:53,928 INFO L87 Difference]: Start difference. First operand 3237 states and 4853 transitions. Second operand 5 states. [2020-08-21 21:32:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:32:56,822 INFO L93 Difference]: Finished difference Result 9441 states and 14115 transitions. [2020-08-21 21:32:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:32:56,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-21 21:32:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:32:56,853 INFO L225 Difference]: With dead ends: 9441 [2020-08-21 21:32:56,853 INFO L226 Difference]: Without dead ends: 6238 [2020-08-21 21:32:56,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:32:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2020-08-21 21:32:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 6192. [2020-08-21 21:32:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6192 states. [2020-08-21 21:32:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9193 transitions. [2020-08-21 21:32:57,158 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9193 transitions. Word has length 148 [2020-08-21 21:32:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:32:57,159 INFO L479 AbstractCegarLoop]: Abstraction has 6192 states and 9193 transitions. [2020-08-21 21:32:57,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:32:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9193 transitions. [2020-08-21 21:32:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-21 21:32:57,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:32:57,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:32:57,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:32:57,171 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:32:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:32:57,171 INFO L82 PathProgramCache]: Analyzing trace with hash 239618117, now seen corresponding path program 1 times [2020-08-21 21:32:57,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:32:57,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414096309] [2020-08-21 21:32:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:32:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:57,517 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:32:57,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:32:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:32:57,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414096309] [2020-08-21 21:32:57,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:32:57,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:32:57,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699522503] [2020-08-21 21:32:57,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:32:57,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:32:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:32:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:32:57,556 INFO L87 Difference]: Start difference. First operand 6192 states and 9193 transitions. Second operand 4 states. [2020-08-21 21:33:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:00,747 INFO L93 Difference]: Finished difference Result 18492 states and 27451 transitions. [2020-08-21 21:33:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:33:00,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-08-21 21:33:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:00,791 INFO L225 Difference]: With dead ends: 18492 [2020-08-21 21:33:00,791 INFO L226 Difference]: Without dead ends: 12348 [2020-08-21 21:33:00,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:33:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-08-21 21:33:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 6196. [2020-08-21 21:33:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6196 states. [2020-08-21 21:33:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 9197 transitions. [2020-08-21 21:33:01,107 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 9197 transitions. Word has length 149 [2020-08-21 21:33:01,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:01,107 INFO L479 AbstractCegarLoop]: Abstraction has 6196 states and 9197 transitions. [2020-08-21 21:33:01,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:33:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 9197 transitions. [2020-08-21 21:33:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 21:33:01,115 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:01,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:33:01,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:33:01,116 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1772203169, now seen corresponding path program 1 times [2020-08-21 21:33:01,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:01,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660948639] [2020-08-21 21:33:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:01,480 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:33:01,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:33:01,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660948639] [2020-08-21 21:33:01,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:33:01,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:33:01,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37458673] [2020-08-21 21:33:01,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:33:01,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:33:01,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:33:01,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:33:01,524 INFO L87 Difference]: Start difference. First operand 6196 states and 9197 transitions. Second operand 4 states. [2020-08-21 21:33:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:04,596 INFO L93 Difference]: Finished difference Result 16495 states and 24448 transitions. [2020-08-21 21:33:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:33:04,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-08-21 21:33:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:04,616 INFO L225 Difference]: With dead ends: 16495 [2020-08-21 21:33:04,616 INFO L226 Difference]: Without dead ends: 10615 [2020-08-21 21:33:04,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:33:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2020-08-21 21:33:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10569. [2020-08-21 21:33:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-21 21:33:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15484 transitions. [2020-08-21 21:33:05,075 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15484 transitions. Word has length 150 [2020-08-21 21:33:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:05,075 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15484 transitions. [2020-08-21 21:33:05,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:33:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15484 transitions. [2020-08-21 21:33:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 21:33:05,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:05,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:33:05,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:33:05,091 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:05,092 INFO L82 PathProgramCache]: Analyzing trace with hash 251552574, now seen corresponding path program 1 times [2020-08-21 21:33:05,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:05,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714938051] [2020-08-21 21:33:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:05,504 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:33:05,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:33:05,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714938051] [2020-08-21 21:33:05,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:33:05,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:33:05,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831541483] [2020-08-21 21:33:05,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:33:05,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:33:05,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:33:05,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:33:05,540 INFO L87 Difference]: Start difference. First operand 10569 states and 15484 transitions. Second operand 5 states. [2020-08-21 21:33:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:07,664 INFO L93 Difference]: Finished difference Result 21564 states and 31467 transitions. [2020-08-21 21:33:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:33:07,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-21 21:33:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:07,703 INFO L225 Difference]: With dead ends: 21564 [2020-08-21 21:33:07,703 INFO L226 Difference]: Without dead ends: 10851 [2020-08-21 21:33:07,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:33:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-21 21:33:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10805. [2020-08-21 21:33:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10805 states. [2020-08-21 21:33:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10805 states to 10805 states and 15660 transitions. [2020-08-21 21:33:08,265 INFO L78 Accepts]: Start accepts. Automaton has 10805 states and 15660 transitions. Word has length 150 [2020-08-21 21:33:08,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:08,265 INFO L479 AbstractCegarLoop]: Abstraction has 10805 states and 15660 transitions. [2020-08-21 21:33:08,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:33:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 10805 states and 15660 transitions. [2020-08-21 21:33:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 21:33:08,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:08,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:33:08,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:33:08,283 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:08,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1535594178, now seen corresponding path program 1 times [2020-08-21 21:33:08,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:08,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995966060] [2020-08-21 21:33:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:08,616 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:33:08,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:33:08,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995966060] [2020-08-21 21:33:08,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:33:08,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:33:08,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222052177] [2020-08-21 21:33:08,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:33:08,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:33:08,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:33:08,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:33:08,661 INFO L87 Difference]: Start difference. First operand 10805 states and 15660 transitions. Second operand 5 states. [2020-08-21 21:33:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:11,709 INFO L93 Difference]: Finished difference Result 15230 states and 22013 transitions. [2020-08-21 21:33:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:33:11,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-21 21:33:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:11,724 INFO L225 Difference]: With dead ends: 15230 [2020-08-21 21:33:11,724 INFO L226 Difference]: Without dead ends: 10851 [2020-08-21 21:33:11,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:33:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-21 21:33:12,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10569. [2020-08-21 21:33:12,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-21 21:33:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15362 transitions. [2020-08-21 21:33:12,267 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15362 transitions. Word has length 150 [2020-08-21 21:33:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:12,267 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15362 transitions. [2020-08-21 21:33:12,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:33:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15362 transitions. [2020-08-21 21:33:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 21:33:12,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:12,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:33:12,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:33:12,279 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:12,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1232731994, now seen corresponding path program 1 times [2020-08-21 21:33:12,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:12,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208020842] [2020-08-21 21:33:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:12,542 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:33:12,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:33:12,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208020842] [2020-08-21 21:33:12,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:33:12,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:33:12,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126172241] [2020-08-21 21:33:12,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:33:12,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:33:12,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:33:12,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:33:12,594 INFO L87 Difference]: Start difference. First operand 10569 states and 15362 transitions. Second operand 4 states. [2020-08-21 21:33:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:16,154 INFO L93 Difference]: Finished difference Result 25409 states and 36872 transitions. [2020-08-21 21:33:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:33:16,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-08-21 21:33:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:16,180 INFO L225 Difference]: With dead ends: 25409 [2020-08-21 21:33:16,180 INFO L226 Difference]: Without dead ends: 21030 [2020-08-21 21:33:16,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:33:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-08-21 21:33:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 10577. [2020-08-21 21:33:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10577 states. [2020-08-21 21:33:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 15370 transitions. [2020-08-21 21:33:16,702 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 15370 transitions. Word has length 151 [2020-08-21 21:33:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:16,702 INFO L479 AbstractCegarLoop]: Abstraction has 10577 states and 15370 transitions. [2020-08-21 21:33:16,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:33:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 15370 transitions. [2020-08-21 21:33:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 21:33:16,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:16,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:33:16,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:33:16,713 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1234425885, now seen corresponding path program 1 times [2020-08-21 21:33:16,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:16,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619267844] [2020-08-21 21:33:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:17,183 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:33:17,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:33:17,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619267844] [2020-08-21 21:33:17,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:33:17,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:33:17,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574418369] [2020-08-21 21:33:17,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:33:17,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:33:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:33:17,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:33:17,231 INFO L87 Difference]: Start difference. First operand 10577 states and 15370 transitions. Second operand 5 states. [2020-08-21 21:33:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:20,272 INFO L93 Difference]: Finished difference Result 30843 states and 44647 transitions. [2020-08-21 21:33:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:33:20,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-21 21:33:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:20,288 INFO L225 Difference]: With dead ends: 30843 [2020-08-21 21:33:20,288 INFO L226 Difference]: Without dead ends: 20313 [2020-08-21 21:33:20,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:33:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2020-08-21 21:33:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20283. [2020-08-21 21:33:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20283 states. [2020-08-21 21:33:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 29041 transitions. [2020-08-21 21:33:21,044 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 29041 transitions. Word has length 152 [2020-08-21 21:33:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:21,045 INFO L479 AbstractCegarLoop]: Abstraction has 20283 states and 29041 transitions. [2020-08-21 21:33:21,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:33:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 29041 transitions. [2020-08-21 21:33:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 21:33:21,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:21,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:33:21,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:33:21,059 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:21,059 INFO L82 PathProgramCache]: Analyzing trace with hash -695536157, now seen corresponding path program 1 times [2020-08-21 21:33:21,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:21,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953895871] [2020-08-21 21:33:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:21,646 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 21:33:21,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:33:21,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953895871] [2020-08-21 21:33:21,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:33:21,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:33:21,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520328709] [2020-08-21 21:33:21,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:33:21,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:33:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:33:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:33:21,719 INFO L87 Difference]: Start difference. First operand 20283 states and 29041 transitions. Second operand 5 states. [2020-08-21 21:33:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:25,849 INFO L93 Difference]: Finished difference Result 54646 states and 77842 transitions. [2020-08-21 21:33:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:33:25,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-21 21:33:25,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:25,879 INFO L225 Difference]: With dead ends: 54646 [2020-08-21 21:33:25,879 INFO L226 Difference]: Without dead ends: 34484 [2020-08-21 21:33:25,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:33:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34484 states.