/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:01:23,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:01:24,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:01:24,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:01:24,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:01:24,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:01:24,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:01:24,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:01:24,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:01:24,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:01:24,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:01:24,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:01:24,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:01:24,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:01:24,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:01:24,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:01:24,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:01:24,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:01:24,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:01:24,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:01:24,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:01:24,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:01:24,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:01:24,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:01:24,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 23:01:24,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 23:01:24,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 23:01:24,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 23:01:24,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 23:01:24,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 23:01:24,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 23:01:24,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 23:01:24,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 23:01:24,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 23:01:24,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 23:01:24,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 23:01:24,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 23:01:24,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 23:01:24,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:01:24,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:01:24,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:01:24,056 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:01:24,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:01:24,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:01:24,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:01:24,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:01:24,085 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:01:24,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:01:24,085 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:01:24,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:01:24,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:01:24,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:01:24,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:01:24,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:01:24,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:01:24,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:01:24,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:01:24,089 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:01:24,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:01:24,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:01:24,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:01:24,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:01:24,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:01:24,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:01:24,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:01:24,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:01:24,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:01:24,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:01:24,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:24,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:01:24,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:01:24,091 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:01:24,408 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:01:24,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:01:24,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:01:24,430 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:01:24,433 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:01:24,435 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label54.c [2020-07-21 23:01:24,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3075ab59/557f033c544b4864b8066b733bac97de/FLAGdcdd0eb7d [2020-07-21 23:01:25,134 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:01:25,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label54.c [2020-07-21 23:01:25,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3075ab59/557f033c544b4864b8066b733bac97de/FLAGdcdd0eb7d [2020-07-21 23:01:25,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3075ab59/557f033c544b4864b8066b733bac97de [2020-07-21 23:01:25,377 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:01:25,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:01:25,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:01:25,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:01:25,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:01:25,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:01:25" (1/1) ... [2020-07-21 23:01:25,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c787e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:25, skipping insertion in model container [2020-07-21 23:01:25,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:01:25" (1/1) ... [2020-07-21 23:01:25,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:01:25,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:01:25,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:01:25,905 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:01:26,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:01:26,191 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:01:26,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:26 WrapperNode [2020-07-21 23:01:26,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:01:26,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:01:26,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:01:26,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:01:26,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:26" (1/1) ... [2020-07-21 23:01:26,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:26" (1/1) ... [2020-07-21 23:01:26,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:26" (1/1) ... [2020-07-21 23:01:26,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:26" (1/1) ... [2020-07-21 23:01:26,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:26" (1/1) ... [2020-07-21 23:01:26,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:26" (1/1) ... [2020-07-21 23:01:26,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:26" (1/1) ... [2020-07-21 23:01:26,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:01:26,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:01:26,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:01:26,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:01:26,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 23:01:26,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:01:26,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:01:26,459 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-21 23:01:26,459 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:01:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-21 23:01:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:01:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:01:26,461 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 23:01:26,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:01:26,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:01:26,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:01:27,815 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:01:27,815 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:01:27,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:01:27 BoogieIcfgContainer [2020-07-21 23:01:27,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:01:27,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:01:27,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:01:27,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:01:27,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:01:25" (1/3) ... [2020-07-21 23:01:27,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21280c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:01:27, skipping insertion in model container [2020-07-21 23:01:27,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:01:26" (2/3) ... [2020-07-21 23:01:27,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21280c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:01:27, skipping insertion in model container [2020-07-21 23:01:27,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:01:27" (3/3) ... [2020-07-21 23:01:27,832 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label54.c [2020-07-21 23:01:27,845 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:01:27,855 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:01:27,874 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:01:27,905 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:01:27,906 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:01:27,906 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:01:27,906 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:01:27,906 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:01:27,907 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:01:27,907 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:01:27,907 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:01:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-21 23:01:27,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 23:01:27,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:01:27,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:01:27,953 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:01:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:01:27,961 INFO L82 PathProgramCache]: Analyzing trace with hash 664864703, now seen corresponding path program 1 times [2020-07-21 23:01:27,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:01:27,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049243928] [2020-07-21 23:01:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:28,124 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:01:28,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:01:28,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:01:28,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:01:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:28,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:01:28,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049243928] [2020-07-21 23:01:28,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:01:28,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:01:28,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086676641] [2020-07-21 23:01:28,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:01:28,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:01:28,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:01:28,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:01:28,312 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-07-21 23:01:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:01:29,419 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2020-07-21 23:01:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:01:29,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-07-21 23:01:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:01:29,448 INFO L225 Difference]: With dead ends: 571 [2020-07-21 23:01:29,448 INFO L226 Difference]: Without dead ends: 294 [2020-07-21 23:01:29,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:01:29,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-21 23:01:29,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-07-21 23:01:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-21 23:01:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 391 transitions. [2020-07-21 23:01:29,543 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 391 transitions. Word has length 68 [2020-07-21 23:01:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:01:29,543 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 391 transitions. [2020-07-21 23:01:29,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:01:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 391 transitions. [2020-07-21 23:01:29,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-21 23:01:29,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:01:29,551 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:01:29,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:29,767 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:01:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:01:29,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2009427742, now seen corresponding path program 1 times [2020-07-21 23:01:29,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:01:29,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260278296] [2020-07-21 23:01:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:29,871 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:01:29,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:01:29,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 23:01:29,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:01:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 23:01:29,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:01:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 23:01:30,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260278296] [2020-07-21 23:01:30,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:01:30,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-07-21 23:01:30,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543789619] [2020-07-21 23:01:30,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:01:30,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:01:30,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:01:30,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:01:30,062 INFO L87 Difference]: Start difference. First operand 294 states and 391 transitions. Second operand 4 states. [2020-07-21 23:01:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:01:30,847 INFO L93 Difference]: Finished difference Result 586 states and 788 transitions. [2020-07-21 23:01:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:01:30,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-07-21 23:01:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:01:30,856 INFO L225 Difference]: With dead ends: 586 [2020-07-21 23:01:30,856 INFO L226 Difference]: Without dead ends: 584 [2020-07-21 23:01:30,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 268 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:01:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-07-21 23:01:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2020-07-21 23:01:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-21 23:01:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 786 transitions. [2020-07-21 23:01:30,901 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 786 transitions. Word has length 138 [2020-07-21 23:01:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:01:30,903 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 786 transitions. [2020-07-21 23:01:30,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:01:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 786 transitions. [2020-07-21 23:01:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-21 23:01:30,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:01:30,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:01:31,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:31,122 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:01:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:01:31,123 INFO L82 PathProgramCache]: Analyzing trace with hash -613948535, now seen corresponding path program 1 times [2020-07-21 23:01:31,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:01:31,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075359241] [2020-07-21 23:01:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:31,223 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:01:31,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:01:31,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 23:01:31,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:01:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:31,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:01:31,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075359241] [2020-07-21 23:01:31,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:01:31,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:01:31,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582992915] [2020-07-21 23:01:31,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:01:31,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:01:31,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:01:31,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:01:31,310 INFO L87 Difference]: Start difference. First operand 584 states and 786 transitions. Second operand 5 states. [2020-07-21 23:01:32,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:01:32,267 INFO L93 Difference]: Finished difference Result 1321 states and 1762 transitions. [2020-07-21 23:01:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:01:32,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2020-07-21 23:01:32,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:01:32,273 INFO L225 Difference]: With dead ends: 1321 [2020-07-21 23:01:32,273 INFO L226 Difference]: Without dead ends: 743 [2020-07-21 23:01:32,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:01:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-07-21 23:01:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 596. [2020-07-21 23:01:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-07-21 23:01:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 794 transitions. [2020-07-21 23:01:32,315 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 794 transitions. Word has length 141 [2020-07-21 23:01:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:01:32,315 INFO L479 AbstractCegarLoop]: Abstraction has 596 states and 794 transitions. [2020-07-21 23:01:32,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:01:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 794 transitions. [2020-07-21 23:01:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-21 23:01:32,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:01:32,321 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:01:32,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:32,535 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:01:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:01:32,536 INFO L82 PathProgramCache]: Analyzing trace with hash -628006051, now seen corresponding path program 1 times [2020-07-21 23:01:32,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:01:32,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614452372] [2020-07-21 23:01:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:32,647 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:01:32,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:01:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 23:01:32,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:01:32,715 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:01:32,717 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:01:45,099 WARN L193 SmtUtils]: Spent 12.34 s on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 23:01:45,141 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 23:01:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:45,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:01:45,383 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 23:01:45,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:01:45,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:01:45,436 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 23:01:45,438 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 23:01:45,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:01:45,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:01:45,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:01:45,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:01:51,359 WARN L193 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2020-07-21 23:01:51,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614452372] [2020-07-21 23:01:51,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:01:51,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 23:01:51,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339544264] [2020-07-21 23:01:51,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:01:51,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:01:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:01:51,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:01:51,363 INFO L87 Difference]: Start difference. First operand 596 states and 794 transitions. Second operand 6 states. [2020-07-21 23:01:52,112 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-07-21 23:01:54,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:01:54,885 INFO L93 Difference]: Finished difference Result 1539 states and 2219 transitions. [2020-07-21 23:01:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:01:54,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2020-07-21 23:01:54,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:01:54,899 INFO L225 Difference]: With dead ends: 1539 [2020-07-21 23:01:54,899 INFO L226 Difference]: Without dead ends: 1065 [2020-07-21 23:01:54,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:01:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2020-07-21 23:01:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1049. [2020-07-21 23:01:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-07-21 23:01:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1465 transitions. [2020-07-21 23:01:54,995 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1465 transitions. Word has length 147 [2020-07-21 23:01:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:01:54,995 INFO L479 AbstractCegarLoop]: Abstraction has 1049 states and 1465 transitions. [2020-07-21 23:01:54,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:01:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1465 transitions. [2020-07-21 23:01:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 23:01:55,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:01:55,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:01:55,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:55,220 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:01:55,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:01:55,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1103198522, now seen corresponding path program 1 times [2020-07-21 23:01:55,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:01:55,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898380457] [2020-07-21 23:01:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:55,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:01:55,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:01:55,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:01:55,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:01:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:55,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:01:55,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898380457] [2020-07-21 23:01:55,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:01:55,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:01:55,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458256868] [2020-07-21 23:01:55,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:01:55,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:01:55,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:01:55,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:01:55,421 INFO L87 Difference]: Start difference. First operand 1049 states and 1465 transitions. Second operand 5 states. [2020-07-21 23:01:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:01:56,556 INFO L93 Difference]: Finished difference Result 2442 states and 3670 transitions. [2020-07-21 23:01:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:01:56,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2020-07-21 23:01:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:01:56,579 INFO L225 Difference]: With dead ends: 2442 [2020-07-21 23:01:56,579 INFO L226 Difference]: Without dead ends: 1542 [2020-07-21 23:01:56,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:01:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-07-21 23:01:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1506. [2020-07-21 23:01:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2020-07-21 23:01:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2009 transitions. [2020-07-21 23:01:56,658 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2009 transitions. Word has length 190 [2020-07-21 23:01:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:01:56,660 INFO L479 AbstractCegarLoop]: Abstraction has 1506 states and 2009 transitions. [2020-07-21 23:01:56,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:01:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2009 transitions. [2020-07-21 23:01:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-07-21 23:01:56,665 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:01:56,665 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:01:56,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:56,879 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:01:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:01:56,880 INFO L82 PathProgramCache]: Analyzing trace with hash -157046822, now seen corresponding path program 1 times [2020-07-21 23:01:56,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:01:56,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024143004] [2020-07-21 23:01:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:57,008 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:01:57,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:01:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:01:57,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:01:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:57,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:01:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:57,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024143004] [2020-07-21 23:01:57,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:01:57,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 23:01:57,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823875267] [2020-07-21 23:01:57,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:01:57,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:01:57,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:01:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:01:57,231 INFO L87 Difference]: Start difference. First operand 1506 states and 2009 transitions. Second operand 7 states. [2020-07-21 23:01:59,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:01:59,063 INFO L93 Difference]: Finished difference Result 3475 states and 4853 transitions. [2020-07-21 23:01:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:01:59,067 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2020-07-21 23:01:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:01:59,082 INFO L225 Difference]: With dead ends: 3475 [2020-07-21 23:01:59,082 INFO L226 Difference]: Without dead ends: 2118 [2020-07-21 23:01:59,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 432 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:01:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2020-07-21 23:01:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 2098. [2020-07-21 23:01:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2098 states. [2020-07-21 23:01:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2742 transitions. [2020-07-21 23:01:59,168 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2742 transitions. Word has length 217 [2020-07-21 23:01:59,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:01:59,169 INFO L479 AbstractCegarLoop]: Abstraction has 2098 states and 2742 transitions. [2020-07-21 23:01:59,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:01:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2742 transitions. [2020-07-21 23:01:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-07-21 23:01:59,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:01:59,174 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:01:59,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:59,388 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:01:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:01:59,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1210831469, now seen corresponding path program 1 times [2020-07-21 23:01:59,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:01:59,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037052174] [2020-07-21 23:01:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:59,544 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:01:59,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:01:59,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:01:59,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:01:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:59,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:01:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:59,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037052174] [2020-07-21 23:01:59,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:01:59,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 23:01:59,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699192896] [2020-07-21 23:01:59,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:01:59,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:01:59,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:01:59,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:01:59,833 INFO L87 Difference]: Start difference. First operand 2098 states and 2742 transitions. Second operand 7 states. [2020-07-21 23:02:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:02:01,378 INFO L93 Difference]: Finished difference Result 5076 states and 6738 transitions. [2020-07-21 23:02:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 23:02:01,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 220 [2020-07-21 23:02:01,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:02:01,397 INFO L225 Difference]: With dead ends: 5076 [2020-07-21 23:02:01,398 INFO L226 Difference]: Without dead ends: 3127 [2020-07-21 23:02:01,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 435 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:02:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2020-07-21 23:02:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 2692. [2020-07-21 23:02:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2692 states. [2020-07-21 23:02:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 3279 transitions. [2020-07-21 23:02:01,518 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 3279 transitions. Word has length 220 [2020-07-21 23:02:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:02:01,519 INFO L479 AbstractCegarLoop]: Abstraction has 2692 states and 3279 transitions. [2020-07-21 23:02:01,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:02:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 3279 transitions. [2020-07-21 23:02:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 23:02:01,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:02:01,576 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:02:01,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:02:01,782 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:02:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:02:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1723286891, now seen corresponding path program 1 times [2020-07-21 23:02:01,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:02:01,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582962362] [2020-07-21 23:02:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:02:01,956 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:02:01,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:02:01,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:02:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:02:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-21 23:02:02,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:02:02,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582962362] [2020-07-21 23:02:02,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:02:02,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:02:02,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635032658] [2020-07-21 23:02:02,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:02:02,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:02:02,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:02:02,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:02:02,051 INFO L87 Difference]: Start difference. First operand 2692 states and 3279 transitions. Second operand 3 states. [2020-07-21 23:02:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:02:02,805 INFO L93 Difference]: Finished difference Result 5235 states and 6409 transitions. [2020-07-21 23:02:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:02:02,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 23:02:02,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:02:02,819 INFO L225 Difference]: With dead ends: 5235 [2020-07-21 23:02:02,820 INFO L226 Difference]: Without dead ends: 2692 [2020-07-21 23:02:02,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:02:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2020-07-21 23:02:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2245. [2020-07-21 23:02:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 23:02:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 2669 transitions. [2020-07-21 23:02:02,903 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 2669 transitions. Word has length 324 [2020-07-21 23:02:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:02:02,904 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 2669 transitions. [2020-07-21 23:02:02,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:02:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 2669 transitions. [2020-07-21 23:02:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-07-21 23:02:02,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:02:02,917 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:02:03,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:02:03,131 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:02:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:02:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1442499553, now seen corresponding path program 1 times [2020-07-21 23:02:03,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:02:03,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921414559] [2020-07-21 23:02:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:02:03,308 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:02:03,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:02:03,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 23:02:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:02:03,353 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:02:03,353 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:02:03,354 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:02:03,355 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:02:03,356 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:02:03,357 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:02:03,359 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:02:03,360 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:02:15,733 WARN L193 SmtUtils]: Spent 12.35 s on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-07-21 23:02:15,769 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 23:02:15,874 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 23:02:15,875 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:02:15,876 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:02:15,904 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:02:15,906 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:02:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 388 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-21 23:02:16,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:02:16,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:16,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:16,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:16,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:16,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:16,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:16,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:16,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:16,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:16,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:16,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:16,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:16,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:16,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:16,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:16,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:16,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:16,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:16,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921414559] [2020-07-21 23:02:16,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:02:16,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 23:02:16,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163027505] [2020-07-21 23:02:16,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:02:16,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:02:16,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:02:16,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:02:16,610 INFO L87 Difference]: Start difference. First operand 2245 states and 2669 transitions. Second operand 8 states. [2020-07-21 23:02:19,408 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-07-21 23:05:58,582 WARN L193 SmtUtils]: Spent 12.55 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-07-21 23:06:16,926 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-07-21 23:06:38,265 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-07-21 23:07:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:07:23,586 INFO L93 Difference]: Finished difference Result 5092 states and 6170 transitions. [2020-07-21 23:07:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 23:07:23,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 379 [2020-07-21 23:07:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:07:23,607 INFO L225 Difference]: With dead ends: 5092 [2020-07-21 23:07:23,608 INFO L226 Difference]: Without dead ends: 2996 [2020-07-21 23:07:23,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 627 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-07-21 23:07:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2020-07-21 23:07:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2837. [2020-07-21 23:07:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2837 states. [2020-07-21 23:07:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 3329 transitions. [2020-07-21 23:07:23,698 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 3329 transitions. Word has length 379 [2020-07-21 23:07:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:07:23,699 INFO L479 AbstractCegarLoop]: Abstraction has 2837 states and 3329 transitions. [2020-07-21 23:07:23,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:07:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 3329 transitions. [2020-07-21 23:07:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-07-21 23:07:23,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:07:23,712 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:07:23,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:07:23,926 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:07:23,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:07:23,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1422858386, now seen corresponding path program 1 times [2020-07-21 23:07:23,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:07:23,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853472436] [2020-07-21 23:07:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:07:24,118 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:07:24,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:07:24,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 23:07:24,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:07:24,244 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:07:24,245 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:07:24,248 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:07:24,249 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:07:24,249 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:07:24,250 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:07:24,252 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:07:24,253 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:07:24,257 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:07:24,257 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:07:24,259 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:07:24,259 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:07:24,267 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:07:24,270 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:07:24,270 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:07:24,271 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:07:24,278 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:07:24,279 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:07:24,282 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:07:24,283 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:07:24,284 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:07:24,291 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:07:36,954 WARN L193 SmtUtils]: Spent 12.53 s on a formula simplification. DAG size of input: 105 DAG size of output: 36 [2020-07-21 23:07:37,030 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:07:39,283 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 23:07:39,284 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:07:39,284 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:07:39,373 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:07:39,375 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:07:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 188 proven. 197 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-21 23:07:39,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:07:39,910 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-07-21 23:07:39,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:07:39,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:39,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:39,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:07:40,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:40,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:07:40,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:40,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:40,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:07:40,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:07:40,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:07:40,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:07:40,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:07:40,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:07:40,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:07:40,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:07:40,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:07:40,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:07:40,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:07:40,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:07:40,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:07:40,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:07:40,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:07:40,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:07:40,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:07:40,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:07:40,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:07:40,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:07:40,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:07:40,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:40,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:40,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:40,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:40,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:40,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:40,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:40,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:07:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 380 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 23:07:41,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853472436] [2020-07-21 23:07:41,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:07:41,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2020-07-21 23:07:41,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790913946] [2020-07-21 23:07:41,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:07:41,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:07:41,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:07:41,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2020-07-21 23:07:41,065 INFO L87 Difference]: Start difference. First operand 2837 states and 3329 transitions. Second operand 12 states. [2020-07-21 23:08:58,173 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-07-21 23:10:17,885 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2020-07-21 23:10:21,849 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-07-21 23:10:50,612 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 23:11:52,411 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 23:12:26,315 WARN L193 SmtUtils]: Spent 6.30 s on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 23:13:31,510 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-07-21 23:13:32,547 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-21 23:13:58,915 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 23:14:09,735 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 23:14:31,197 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-21 23:14:34,044 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-21 23:14:39,902 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2020-07-21 23:14:50,298 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-21 23:14:56,569 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 23:15:00,009 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 23:15:00,476 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-21 23:15:06,247 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 23:15:11,475 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 23:15:17,136 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-21 23:15:31,492 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 23:15:44,034 WARN L193 SmtUtils]: Spent 6.45 s on a formula simplification that was a NOOP. DAG size: 45