/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 NUM_FUNCTIONS --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/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:11:31,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:11:31,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:11:31,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:11:31,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:11:31,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:11:31,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:11:31,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:11:31,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:11:31,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:11:31,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:11:31,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:11:31,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:11:31,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:11:31,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:11:31,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:11:31,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:11:31,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:11:31,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:11:31,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:11:31,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:11:31,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:11:31,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:11:31,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:11:31,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:11:31,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:11:31,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:11:31,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:11:31,915 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 [2020-07-20 13:11:31,952 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:11:31,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:11:31,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:11:31,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:11:31,954 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:11:31,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:11:31,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:11:31,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:11:31,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:11:31,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:11:31,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:11:31,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:11:31,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:11:31,957 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:11:31,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:11:31,957 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:11:31,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:11:31,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:11:31,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:11:31,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:11:31,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:11:31,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:11:31,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:11:31,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:11:31,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:11:31,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:11:31,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:31,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:11:31,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:11:31,960 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 -> NUM_FUNCTIONS 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 [2020-07-20 13:11:32,254 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:11:32,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:11:32,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:11:32,272 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:11:32,273 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:11:32,273 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-20 13:11:32,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d74b79ee8/1c4fbea3f95843d6af3a44ec2eed5737/FLAG0bc592f91 [2020-07-20 13:11:32,822 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:11:32,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-20 13:11:32,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d74b79ee8/1c4fbea3f95843d6af3a44ec2eed5737/FLAG0bc592f91 [2020-07-20 13:11:33,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d74b79ee8/1c4fbea3f95843d6af3a44ec2eed5737 [2020-07-20 13:11:33,189 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:11:33,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:11:33,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:11:33,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:11:33,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:11:33,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:33" (1/1) ... [2020-07-20 13:11:33,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fe720f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33, skipping insertion in model container [2020-07-20 13:11:33,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:33" (1/1) ... [2020-07-20 13:11:33,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:11:33,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:11:33,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:11:33,425 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:11:33,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:11:33,459 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:11:33,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33 WrapperNode [2020-07-20 13:11:33,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:11:33,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:11:33,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:11:33,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:11:33,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33" (1/1) ... [2020-07-20 13:11:33,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33" (1/1) ... [2020-07-20 13:11:33,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33" (1/1) ... [2020-07-20 13:11:33,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33" (1/1) ... [2020-07-20 13:11:33,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33" (1/1) ... [2020-07-20 13:11:33,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33" (1/1) ... [2020-07-20 13:11:33,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33" (1/1) ... [2020-07-20 13:11:33,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:11:33,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:11:33,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:11:33,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:11:33,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33" (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 [2020-07-20 13:11:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:11:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:11:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-07-20 13:11:33,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:11:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:11:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:11:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-07-20 13:11:33,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:11:33,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:11:33,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:11:33,939 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:11:33,940 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:11:33,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:33 BoogieIcfgContainer [2020-07-20 13:11:33,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:11:33,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:11:33,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:11:33,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:11:33,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:11:33" (1/3) ... [2020-07-20 13:11:33,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3d1562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:33, skipping insertion in model container [2020-07-20 13:11:33,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:33" (2/3) ... [2020-07-20 13:11:33,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3d1562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:33, skipping insertion in model container [2020-07-20 13:11:33,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:33" (3/3) ... [2020-07-20 13:11:33,956 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-07-20 13:11:33,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:11:33,992 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:11:34,008 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:11:34,030 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:11:34,030 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:11:34,030 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:11:34,031 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:11:34,031 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:11:34,031 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:11:34,031 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:11:34,031 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:11:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 13:11:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 13:11:34,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:34,059 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:11:34,059 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:34,066 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-07-20 13:11:34,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:34,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997792055] [2020-07-20 13:11:34,073 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 [2020-07-20 13:11:34,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:11:34,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:34,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:11:34,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:11:34,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:11:34,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997792055] [2020-07-20 13:11:34,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:34,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-20 13:11:34,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970102803] [2020-07-20 13:11:34,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:11:34,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:34,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:11:34,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:11:34,375 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-20 13:11:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:34,531 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-20 13:11:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:11:34,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-20 13:11:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:34,545 INFO L225 Difference]: With dead ends: 41 [2020-07-20 13:11:34,545 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 13:11:34,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:11:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 13:11:34,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 13:11:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 13:11:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-20 13:11:34,600 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-07-20 13:11:34,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:34,601 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-20 13:11:34,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:11:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-20 13:11:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 13:11:34,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:34,605 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:11:34,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:34,820 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:34,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-07-20 13:11:34,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:34,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592701680] [2020-07-20 13:11:34,822 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 [2020-07-20 13:11:34,880 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:11:34,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:34,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:11:34,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 13:11:34,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:11:34,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592701680] [2020-07-20 13:11:34,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:11:34,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:11:34,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119417183] [2020-07-20 13:11:34,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:11:34,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:34,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:11:34,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:11:34,923 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-07-20 13:11:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:35,004 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 13:11:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:11:35,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-20 13:11:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:35,007 INFO L225 Difference]: With dead ends: 29 [2020-07-20 13:11:35,007 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 13:11:35,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:11:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 13:11:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 13:11:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 13:11:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-07-20 13:11:35,017 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-07-20 13:11:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:35,018 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-07-20 13:11:35,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:11:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-07-20 13:11:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 13:11:35,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:35,020 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:11:35,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:35,235 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-07-20 13:11:35,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:35,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910990457] [2020-07-20 13:11:35,239 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 [2020-07-20 13:11:35,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:35,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:35,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 13:11:35,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 13:11:35,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:35,685 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 13:11:35,689 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 13:11:35,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:35,833 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:11:35,836 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:11:35,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:35,839 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:11:35,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:35,842 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:11:35,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:36,216 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 13:11:36,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:36,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:36,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:36,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:36,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:36,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:36,245 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 13:11:36,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:36,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:36,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:36,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:36,268 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 13:11:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 13:11:36,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910990457] [2020-07-20 13:11:36,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:36,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2020-07-20 13:11:36,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614417528] [2020-07-20 13:11:36,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:11:36,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:36,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:11:36,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:11:36,301 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 22 states. [2020-07-20 13:11:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:36,659 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-20 13:11:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:11:36,660 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-07-20 13:11:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:36,662 INFO L225 Difference]: With dead ends: 40 [2020-07-20 13:11:36,662 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 13:11:36,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:11:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 13:11:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-07-20 13:11:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 13:11:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-07-20 13:11:36,676 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-07-20 13:11:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:36,676 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-07-20 13:11:36,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:11:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-07-20 13:11:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 13:11:36,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:36,679 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:11:36,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:36,893 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-07-20 13:11:36,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:36,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865647575] [2020-07-20 13:11:36,896 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 [2020-07-20 13:11:36,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:36,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:11:36,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 13:11:36,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:37,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:37,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-20 13:11:37,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865647575] [2020-07-20 13:11:37,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:37,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-20 13:11:37,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256808239] [2020-07-20 13:11:37,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 13:11:37,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:37,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 13:11:37,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:11:37,148 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 8 states. [2020-07-20 13:11:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:37,232 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-07-20 13:11:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:11:37,233 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-07-20 13:11:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:37,235 INFO L225 Difference]: With dead ends: 39 [2020-07-20 13:11:37,235 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 13:11:37,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:11:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 13:11:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 13:11:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:11:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2020-07-20 13:11:37,246 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 43 [2020-07-20 13:11:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:37,247 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2020-07-20 13:11:37,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 13:11:37,247 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2020-07-20 13:11:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 13:11:37,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:37,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:11:37,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:37,464 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:37,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:37,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-07-20 13:11:37,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:37,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50567923] [2020-07-20 13:11:37,466 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 [2020-07-20 13:11:37,506 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:37,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:37,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 13:11:37,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 13:11:37,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:37,989 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:11:38,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:38,178 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:11:38,181 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:11:38,182 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:11:38,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:38,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:38,308 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:11:38,309 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:11:38,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:38,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:38,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:38,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:38,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:38,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:11:38,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:38,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:38,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:40,768 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_10 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3)) .cse0) .cse0 (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_10 (- 1)))) (let ((.cse2 (div .cse1 (- 2)))) (or (<= 3 (div (+ .cse1 (- 1)) (- 2))) (< .cse2 1) (< .cse2 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 2)) 1)))))) (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_10 (- 1)))) (or (<= 3 (div (+ .cse3 (- 1)) (- 2))) (< (div .cse3 (- 2)) 1) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3)))))) is different from false [2020-07-20 13:11:42,806 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_10 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3)) .cse0) (forall ((v_prenex_2 Int)) (let ((.cse1 (* v_prenex_2 (- 1)))) (or (< (div .cse1 (- 2)) 1) (< (div (+ .cse1 (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3) (<= 3 (div (+ .cse1 (- 1)) (- 2)))))) .cse0 (forall ((v_prenex_1 Int)) (let ((.cse3 (* v_prenex_1 (- 1)))) (let ((.cse2 (div .cse3 (- 2)))) (or (< .cse2 (+ (div (+ .cse3 (* |c_mult_#res| (- 1))) (- 2)) 1)) (< .cse2 1) (<= 3 (div (+ .cse3 (- 1)) (- 2))))))))) is different from false [2020-07-20 13:11:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2020-07-20 13:11:42,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50567923] [2020-07-20 13:11:42,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:42,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2020-07-20 13:11:42,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559945638] [2020-07-20 13:11:42,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 13:11:42,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:42,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 13:11:42,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=948, Unknown=2, NotChecked=126, Total=1190 [2020-07-20 13:11:42,879 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 35 states. [2020-07-20 13:12:25,638 WARN L193 SmtUtils]: Spent 42.51 s on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-07-20 13:12:31,770 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-07-20 13:12:32,138 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 13:12:32,683 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 13:12:33,033 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:12:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:36,988 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-20 13:12:36,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 13:12:36,989 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-07-20 13:12:36,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:36,991 INFO L225 Difference]: With dead ends: 62 [2020-07-20 13:12:36,992 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 13:12:36,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 51.1s TimeCoverageRelationStatistics Valid=207, Invalid=1691, Unknown=2, NotChecked=170, Total=2070 [2020-07-20 13:12:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 13:12:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2020-07-20 13:12:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 13:12:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 66 transitions. [2020-07-20 13:12:37,008 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 66 transitions. Word has length 44 [2020-07-20 13:12:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:37,009 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 66 transitions. [2020-07-20 13:12:37,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 13:12:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 66 transitions. [2020-07-20 13:12:37,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 13:12:37,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:37,011 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:37,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:37,227 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:37,227 INFO L82 PathProgramCache]: Analyzing trace with hash -58046165, now seen corresponding path program 2 times [2020-07-20 13:12:37,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:37,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605493281] [2020-07-20 13:12:37,228 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 [2020-07-20 13:12:37,270 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:12:37,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:37,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:12:37,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 13:12:37,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:38,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:38,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-20 13:12:38,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605493281] [2020-07-20 13:12:38,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:38,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-20 13:12:38,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418183238] [2020-07-20 13:12:38,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 13:12:38,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:38,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 13:12:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:12:38,248 INFO L87 Difference]: Start difference. First operand 44 states and 66 transitions. Second operand 8 states. [2020-07-20 13:12:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:38,581 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2020-07-20 13:12:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:12:38,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-07-20 13:12:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:38,589 INFO L225 Difference]: With dead ends: 50 [2020-07-20 13:12:38,589 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 13:12:38,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:12:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 13:12:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 13:12:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 13:12:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 65 transitions. [2020-07-20 13:12:38,603 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 65 transitions. Word has length 56 [2020-07-20 13:12:38,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:38,604 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 65 transitions. [2020-07-20 13:12:38,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 13:12:38,604 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 65 transitions. [2020-07-20 13:12:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 13:12:38,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:38,606 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:38,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:38,813 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:38,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 4 times [2020-07-20 13:12:38,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:38,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769249701] [2020-07-20 13:12:38,814 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 [2020-07-20 13:12:38,850 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:38,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 13:12:38,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 13:12:39,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:40,696 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:12:40,697 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:12:41,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,399 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:12:41,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:12:41,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:43,253 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 13:12:43,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:43,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:43,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:43,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 13:12:43,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769249701] [2020-07-20 13:12:43,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:43,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2020-07-20 13:12:43,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742494521] [2020-07-20 13:12:43,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 13:12:43,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 13:12:43,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2020-07-20 13:12:43,927 INFO L87 Difference]: Start difference. First operand 44 states and 65 transitions. Second operand 32 states. [2020-07-20 13:12:46,817 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:12:47,200 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 13:12:49,608 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 13:12:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:50,326 INFO L93 Difference]: Finished difference Result 78 states and 121 transitions. [2020-07-20 13:12:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 13:12:50,335 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2020-07-20 13:12:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:50,337 INFO L225 Difference]: With dead ends: 78 [2020-07-20 13:12:50,337 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 13:12:50,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=346, Invalid=2204, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 13:12:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 13:12:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2020-07-20 13:12:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 13:12:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 80 transitions. [2020-07-20 13:12:50,351 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 80 transitions. Word has length 44 [2020-07-20 13:12:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:50,351 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 80 transitions. [2020-07-20 13:12:50,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 13:12:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 80 transitions. [2020-07-20 13:12:50,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 13:12:50,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:50,354 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:50,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:50,570 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:50,570 INFO L82 PathProgramCache]: Analyzing trace with hash 901460287, now seen corresponding path program 3 times [2020-07-20 13:12:50,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:50,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726617785] [2020-07-20 13:12:50,571 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 [2020-07-20 13:12:50,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:12:50,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:50,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:12:50,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-20 13:12:50,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:12:50,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726617785] [2020-07-20 13:12:50,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:12:50,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:12:50,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944882687] [2020-07-20 13:12:50,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:12:50,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:50,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:12:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:12:50,702 INFO L87 Difference]: Start difference. First operand 51 states and 80 transitions. Second operand 5 states. [2020-07-20 13:12:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:50,974 INFO L93 Difference]: Finished difference Result 82 states and 136 transitions. [2020-07-20 13:12:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:12:50,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-07-20 13:12:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:50,985 INFO L225 Difference]: With dead ends: 82 [2020-07-20 13:12:50,985 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 13:12:50,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:12:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 13:12:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 13:12:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 13:12:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 77 transitions. [2020-07-20 13:12:50,996 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 77 transitions. Word has length 50 [2020-07-20 13:12:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:50,997 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 77 transitions. [2020-07-20 13:12:50,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:12:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 77 transitions. [2020-07-20 13:12:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 13:12:50,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:50,999 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:51,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:51,207 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:51,208 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 5 times [2020-07-20 13:12:51,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:51,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279955230] [2020-07-20 13:12:51,210 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 [2020-07-20 13:12:51,258 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:51,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:51,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 13:12:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-20 13:12:52,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:53,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:55,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:55,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:55,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:55,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:56,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:57,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:57,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:57,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:59,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:00,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:00,068 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:13:00,069 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:13:00,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 23 proven. 115 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-20 13:13:00,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279955230] [2020-07-20 13:13:00,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:13:00,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 36 [2020-07-20 13:13:00,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365463759] [2020-07-20 13:13:00,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 13:13:00,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:13:00,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 13:13:00,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 13:13:00,146 INFO L87 Difference]: Start difference. First operand 51 states and 77 transitions. Second operand 36 states. [2020-07-20 13:13:02,280 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:13:07,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:13:07,333 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2020-07-20 13:13:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 13:13:07,333 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 65 [2020-07-20 13:13:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:13:07,335 INFO L225 Difference]: With dead ends: 83 [2020-07-20 13:13:07,335 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 13:13:07,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=372, Invalid=2934, Unknown=0, NotChecked=0, Total=3306 [2020-07-20 13:13:07,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 13:13:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2020-07-20 13:13:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 13:13:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 99 transitions. [2020-07-20 13:13:07,351 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 99 transitions. Word has length 65 [2020-07-20 13:13:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:13:07,352 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 99 transitions. [2020-07-20 13:13:07,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 13:13:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 99 transitions. [2020-07-20 13:13:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 13:13:07,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:13:07,354 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:13:07,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:07,568 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:13:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:13:07,569 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 6 times [2020-07-20 13:13:07,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:13:07,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064904189] [2020-07-20 13:13:07,570 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 [2020-07-20 13:13:07,624 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:13:07,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:13:07,628 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-20 13:13:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:13:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-07-20 13:13:09,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:13:10,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:11,403 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 13:13:11,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:11,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:11,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:12,184 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 13:13:12,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:12,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:12,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:12,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:12,863 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 13:13:13,805 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 13:13:14,150 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 13:13:15,340 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 13:13:15,810 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 13:13:16,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:16,475 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-20 13:13:16,903 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 13:13:16,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:16,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:16,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:16,907 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:13:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-07-20 13:13:17,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064904189] [2020-07-20 13:13:17,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:13:17,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24] total 36 [2020-07-20 13:13:17,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799305204] [2020-07-20 13:13:17,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 13:13:17,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:13:17,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 13:13:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 13:13:17,583 INFO L87 Difference]: Start difference. First operand 59 states and 99 transitions. Second operand 36 states. [2020-07-20 13:13:19,745 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-07-20 13:13:20,255 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-07-20 13:13:20,502 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-07-20 13:13:23,611 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-07-20 13:13:24,268 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-07-20 13:13:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:13:25,059 INFO L93 Difference]: Finished difference Result 83 states and 123 transitions. [2020-07-20 13:13:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 13:13:25,059 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 65 [2020-07-20 13:13:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:13:25,062 INFO L225 Difference]: With dead ends: 83 [2020-07-20 13:13:25,062 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 13:13:25,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 79 SyntacticMatches, 16 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=351, Invalid=2511, Unknown=0, NotChecked=0, Total=2862 [2020-07-20 13:13:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 13:13:25,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2020-07-20 13:13:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 13:13:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 92 transitions. [2020-07-20 13:13:25,075 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 92 transitions. Word has length 65 [2020-07-20 13:13:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:13:25,075 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 92 transitions. [2020-07-20 13:13:25,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 13:13:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 92 transitions. [2020-07-20 13:13:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 13:13:25,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:13:25,077 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:13:25,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:25,284 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:13:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:13:25,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 7 times [2020-07-20 13:13:25,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:13:25,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87832813] [2020-07-20 13:13:25,286 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:25,347 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:13:25,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:13:25,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-07-20 13:13:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:13:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 10 proven. 103 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-07-20 13:13:26,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:13:28,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:29,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:31,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:31,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:31,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:32,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:32,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:33,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:33,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:33,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:35,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:36,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:36,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:36,302 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:13:36,302 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:13:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 13:13:36,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87832813] [2020-07-20 13:13:36,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:13:36,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 29] total 40 [2020-07-20 13:13:36,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810242618] [2020-07-20 13:13:36,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 13:13:36,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:13:36,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 13:13:36,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1433, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 13:13:36,381 INFO L87 Difference]: Start difference. First operand 59 states and 92 transitions. Second operand 40 states. [2020-07-20 13:13:39,276 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:13:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:13:45,063 INFO L93 Difference]: Finished difference Result 85 states and 127 transitions. [2020-07-20 13:13:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 13:13:45,071 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 72 [2020-07-20 13:13:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:13:45,073 INFO L225 Difference]: With dead ends: 85 [2020-07-20 13:13:45,073 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 13:13:45,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=394, Invalid=3266, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 13:13:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 13:13:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-07-20 13:13:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 13:13:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 98 transitions. [2020-07-20 13:13:45,086 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 98 transitions. Word has length 72 [2020-07-20 13:13:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:13:45,086 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 98 transitions. [2020-07-20 13:13:45,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 13:13:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 98 transitions. [2020-07-20 13:13:45,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-20 13:13:45,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:13:45,088 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:13:45,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:45,304 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:13:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:13:45,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2069826536, now seen corresponding path program 4 times [2020-07-20 13:13:45,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:13:45,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58995899] [2020-07-20 13:13:45,306 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:45,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:13:45,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:13:45,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:13:45,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:13:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 106 proven. 9 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-07-20 13:13:45,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:13:47,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:47,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:47,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:47,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 106 proven. 11 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-07-20 13:13:48,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58995899] [2020-07-20 13:13:48,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:13:48,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2020-07-20 13:13:48,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020587420] [2020-07-20 13:13:48,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 13:13:48,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:13:48,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 13:13:48,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:13:48,026 INFO L87 Difference]: Start difference. First operand 62 states and 98 transitions. Second operand 12 states. [2020-07-20 13:13:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:13:48,567 INFO L93 Difference]: Finished difference Result 99 states and 148 transitions. [2020-07-20 13:13:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:13:48,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-07-20 13:13:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:13:48,575 INFO L225 Difference]: With dead ends: 99 [2020-07-20 13:13:48,575 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 13:13:48,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 124 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:13:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 13:13:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-07-20 13:13:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 13:13:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-07-20 13:13:48,582 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 71 [2020-07-20 13:13:48,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:13:48,583 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-07-20 13:13:48,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 13:13:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-07-20 13:13:48,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 13:13:48,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:13:48,584 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:13:48,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:48,798 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:13:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:13:48,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 8 times [2020-07-20 13:13:48,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:13:48,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132937332] [2020-07-20 13:13:48,799 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:48,871 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:13:48,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:13:48,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-20 13:13:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:13:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 37 proven. 104 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-20 13:13:50,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:13:53,013 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:13:55,052 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:13:55,053 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:13:56,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:56,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:13:58,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:58,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:58,370 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:13:59,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:59,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:59,704 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:14:00,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:00,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:00,821 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:14:01,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:01,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:01,777 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:14:01,778 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:14:03,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:03,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:03,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:14:03,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:14:03,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:03,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:03,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:03,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:03,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:05,986 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (< |c_mult_#in~m| 1))) (and (forall ((v_mult_~n_BEFORE_CALL_68 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_68 (- 1)))) (let ((.cse0 (div .cse1 (- 6)))) (or (< .cse0 1) (< .cse0 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 6)) 1)) (<= 3 (div (+ .cse1 (- 1)) (- 6))))))) .cse2 (or .cse2 (forall ((v_mult_~n_BEFORE_CALL_68 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_68 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3))) (forall ((v_mult_~n_BEFORE_CALL_68 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_68 (- 1)))) (or (< (div .cse3 (- 6)) 1) (<= 3 (div (+ .cse3 (- 1)) (- 6))) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3)))))) is different from false [2020-07-20 13:14:08,019 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (< |c_mult_#in~m| 1))) (and (forall ((v_mult_~n_BEFORE_CALL_68 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_68 (- 1)))) (let ((.cse0 (div .cse1 (- 6)))) (or (< .cse0 1) (< .cse0 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 6)) 1)) (<= 3 (div (+ .cse1 (- 1)) (- 6))))))) (or .cse2 (forall ((v_prenex_3 Int)) (< (div (+ (* v_prenex_3 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3))) .cse2 (forall ((v_prenex_4 Int)) (let ((.cse3 (* v_prenex_4 (- 1)))) (or (<= 3 (div (+ .cse3 (- 1)) (- 6))) (< (div .cse3 (- 6)) 1) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3)))))) is different from false [2020-07-20 13:14:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 165 refuted. 0 times theorem prover too weak. 36 trivial. 16 not checked. [2020-07-20 13:14:08,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132937332] [2020-07-20 13:14:08,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:14:08,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 55 [2020-07-20 13:14:08,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178117585] [2020-07-20 13:14:08,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-20 13:14:08,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:14:08,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-20 13:14:08,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2592, Unknown=2, NotChecked=206, Total=2970 [2020-07-20 13:14:08,441 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 55 states. [2020-07-20 13:14:11,391 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 49 DAG size of output: 11 [2020-07-20 13:14:14,093 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 13:14:14,535 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:14:19,642 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-20 13:14:20,086 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 14 [2020-07-20 13:14:22,239 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:14:22,725 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 13:14:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:14:23,423 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-07-20 13:14:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 13:14:23,430 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 72 [2020-07-20 13:14:23,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:14:23,432 INFO L225 Difference]: With dead ends: 80 [2020-07-20 13:14:23,432 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 13:14:23,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=517, Invalid=5189, Unknown=2, NotChecked=298, Total=6006 [2020-07-20 13:14:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 13:14:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-07-20 13:14:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 13:14:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2020-07-20 13:14:23,443 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 72 [2020-07-20 13:14:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:14:23,443 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2020-07-20 13:14:23,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-20 13:14:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2020-07-20 13:14:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 13:14:23,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:14:23,445 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:14:23,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:14:23,647 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:14:23,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:14:23,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 9 times [2020-07-20 13:14:23,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:14:23,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598005217] [2020-07-20 13:14:23,649 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:14:23,716 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:14:23,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:14:23,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 13:14:23,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:14:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-20 13:14:24,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:14:25,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:26,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:26,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:26,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:27,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:27,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:27,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:30,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:31,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:31,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:31,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 13:14:31,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598005217] [2020-07-20 13:14:31,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:14:31,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 31 [2020-07-20 13:14:31,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119677127] [2020-07-20 13:14:31,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 13:14:31,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:14:31,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 13:14:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2020-07-20 13:14:31,647 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 31 states. [2020-07-20 13:14:34,947 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:14:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:14:38,429 INFO L93 Difference]: Finished difference Result 81 states and 109 transitions. [2020-07-20 13:14:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 13:14:38,437 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2020-07-20 13:14:38,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:14:38,439 INFO L225 Difference]: With dead ends: 81 [2020-07-20 13:14:38,439 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 13:14:38,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=333, Invalid=2319, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 13:14:38,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 13:14:38,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-07-20 13:14:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 13:14:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-07-20 13:14:38,450 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 65 [2020-07-20 13:14:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:14:38,451 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-07-20 13:14:38,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 13:14:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-07-20 13:14:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 13:14:38,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:14:38,452 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:14:38,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:14:38,666 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:14:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:14:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 10 times [2020-07-20 13:14:38,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:14:38,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655216039] [2020-07-20 13:14:38,668 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:14:38,747 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:14:38,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:14:38,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 117 conjunts are in the unsatisfiable core [2020-07-20 13:14:38,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:14:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 42 proven. 131 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-07-20 13:14:41,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:14:43,834 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:14:45,055 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:14:46,247 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:14:46,248 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:14:48,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:48,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:48,445 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:14:50,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:50,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:14:52,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:52,234 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:14:52,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:53,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:53,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:14:55,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:55,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:55,032 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:14:56,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:56,097 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:14:56,097 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:14:56,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:57,941 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 13:14:58,565 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 13:14:58,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:58,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:58,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:14:58,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:58,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:58,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:58,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:58,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:58,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:14:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 7 proven. 229 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-20 13:14:59,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655216039] [2020-07-20 13:14:59,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:14:59,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 34] total 58 [2020-07-20 13:14:59,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30356576] [2020-07-20 13:14:59,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-20 13:14:59,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:14:59,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-20 13:14:59,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3126, Unknown=0, NotChecked=0, Total=3306 [2020-07-20 13:14:59,036 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 58 states. [2020-07-20 13:15:02,430 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 13:15:02,957 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 13:15:08,467 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 13:15:09,212 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 14 [2020-07-20 13:15:09,676 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 13:15:10,275 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2020-07-20 13:15:10,899 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 13:15:11,433 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2020-07-20 13:15:11,907 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 13:15:12,413 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2020-07-20 13:15:12,881 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 13:15:13,387 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2020-07-20 13:15:13,851 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 13:15:14,349 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 13:15:14,818 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 14 [2020-07-20 13:15:15,970 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 13:15:17,477 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 13:15:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:15:18,853 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2020-07-20 13:15:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 13:15:18,861 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 79 [2020-07-20 13:15:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:15:18,862 INFO L225 Difference]: With dead ends: 108 [2020-07-20 13:15:18,863 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 13:15:18,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=845, Invalid=7897, Unknown=0, NotChecked=0, Total=8742 [2020-07-20 13:15:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 13:15:18,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2020-07-20 13:15:18,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 13:15:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 112 transitions. [2020-07-20 13:15:18,876 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 112 transitions. Word has length 79 [2020-07-20 13:15:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:15:18,876 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 112 transitions. [2020-07-20 13:15:18,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-20 13:15:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 112 transitions. [2020-07-20 13:15:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 13:15:18,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:15:18,878 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:15:19,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:15:19,084 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:15:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:15:19,084 INFO L82 PathProgramCache]: Analyzing trace with hash 365189506, now seen corresponding path program 11 times [2020-07-20 13:15:19,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:15:19,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281642194] [2020-07-20 13:15:19,085 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:15:19,178 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:15:19,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:15:19,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 13:15:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:15:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-07-20 13:15:21,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:15:24,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:26,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:26,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:26,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:28,284 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:15:28,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:28,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:28,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:30,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:30,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:30,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:32,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:33,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:33,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:33,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:34,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:34,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:34,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:35,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:36,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:36,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:36,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:38,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:44,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:44,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:15:44,287 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:15:44,288 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:15:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 31 proven. 315 refuted. 4 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-20 13:15:44,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281642194] [2020-07-20 13:15:44,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:15:44,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 38] total 52 [2020-07-20 13:15:44,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257523365] [2020-07-20 13:15:44,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-20 13:15:44,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:15:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-20 13:15:44,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2483, Unknown=2, NotChecked=0, Total=2652 [2020-07-20 13:15:44,384 INFO L87 Difference]: Start difference. First operand 85 states and 112 transitions. Second operand 52 states. [2020-07-20 13:15:47,873 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:15:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:15:56,417 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-07-20 13:15:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 13:15:56,417 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 93 [2020-07-20 13:15:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:15:56,419 INFO L225 Difference]: With dead ends: 110 [2020-07-20 13:15:56,419 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 13:15:56,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=590, Invalid=5570, Unknown=2, NotChecked=0, Total=6162 [2020-07-20 13:15:56,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 13:15:56,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 88. [2020-07-20 13:15:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 13:15:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2020-07-20 13:15:56,431 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 93 [2020-07-20 13:15:56,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:15:56,431 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2020-07-20 13:15:56,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-20 13:15:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2020-07-20 13:15:56,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 13:15:56,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:15:56,433 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:15:56,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:15:56,640 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:15:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:15:56,641 INFO L82 PathProgramCache]: Analyzing trace with hash -173240844, now seen corresponding path program 12 times [2020-07-20 13:15:56,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:15:56,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780129789] [2020-07-20 13:15:56,642 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:15:56,764 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:15:56,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:15:56,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-20 13:15:56,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:15:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 18 proven. 352 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-20 13:15:59,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:16:01,982 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:02,332 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:02,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:03,739 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:16:04,086 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:04,428 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:04,764 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:05,102 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:05,440 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:05,772 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:06,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:06,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:06,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:07,388 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:16:07,731 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:08,078 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:08,415 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:08,763 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:09,094 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:09,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:12,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:14,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:14,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:14,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:15,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:16,609 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:16:17,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:18,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:18,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:18,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:19,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:19,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:19,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:20,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:20,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:20,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:21,503 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:16:21,800 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:22,091 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:24,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:26,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:26,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:16:26,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:16:29,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780129789] [2020-07-20 13:16:29,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:16:29,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-20 13:16:29,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405210603] [2020-07-20 13:16:29,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 13:16:29,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:16:29,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 13:16:29,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3225, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 13:16:29,149 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand 27 states. [2020-07-20 13:16:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:16:36,959 INFO L93 Difference]: Finished difference Result 101 states and 136 transitions. [2020-07-20 13:16:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 13:16:36,960 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-07-20 13:16:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:16:36,961 INFO L225 Difference]: With dead ends: 101 [2020-07-20 13:16:36,961 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 13:16:36,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=583, Invalid=5737, Unknown=0, NotChecked=0, Total=6320 [2020-07-20 13:16:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 13:16:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-07-20 13:16:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 13:16:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 129 transitions. [2020-07-20 13:16:36,977 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 129 transitions. Word has length 121 [2020-07-20 13:16:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:16:36,977 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 129 transitions. [2020-07-20 13:16:36,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 13:16:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 129 transitions. [2020-07-20 13:16:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 13:16:36,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:16:36,980 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:16:37,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:16:37,195 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:16:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:16:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1182847487, now seen corresponding path program 13 times [2020-07-20 13:16:37,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:16:37,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558681388] [2020-07-20 13:16:37,197 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:16:37,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:16:37,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:16:37,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 13:16:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:16:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 18 proven. 229 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-07-20 13:16:40,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:16:43,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:45,266 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:45,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:46,918 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:16:47,201 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:48,007 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:48,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:50,499 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:16:51,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:53,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:54,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:55,594 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:16:56,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:56,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:56,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:57,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:57,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:57,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:58,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:16:59,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:01,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:03,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:03,764 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:17:03,765 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:17:03,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 380 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-07-20 13:17:03,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558681388] [2020-07-20 13:17:03,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:17:03,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 41] total 56 [2020-07-20 13:17:03,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287997281] [2020-07-20 13:17:03,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-20 13:17:03,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:17:03,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-20 13:17:03,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2897, Unknown=0, NotChecked=0, Total=3080 [2020-07-20 13:17:03,902 INFO L87 Difference]: Start difference. First operand 93 states and 129 transitions. Second operand 56 states. [2020-07-20 13:17:07,790 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:17:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:17:17,009 INFO L93 Difference]: Finished difference Result 115 states and 154 transitions. [2020-07-20 13:17:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 13:17:17,017 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 100 [2020-07-20 13:17:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:17:17,019 INFO L225 Difference]: With dead ends: 115 [2020-07-20 13:17:17,019 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 13:17:17,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=666, Invalid=6474, Unknown=0, NotChecked=0, Total=7140 [2020-07-20 13:17:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 13:17:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2020-07-20 13:17:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 13:17:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-07-20 13:17:17,041 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 100 [2020-07-20 13:17:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:17:17,043 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-07-20 13:17:17,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-20 13:17:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-07-20 13:17:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 13:17:17,045 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:17:17,045 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:17:17,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:17:17,259 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:17:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:17:17,259 INFO L82 PathProgramCache]: Analyzing trace with hash -547887379, now seen corresponding path program 14 times [2020-07-20 13:17:17,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:17:17,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644287630] [2020-07-20 13:17:17,260 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:17:17,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:17:17,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:17:17,414 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 13:17:17,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:17:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 12 proven. 308 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-07-20 13:17:19,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:17:21,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:23,045 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:17:23,359 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:17:23,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:24,857 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:17:25,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:25,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:25,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:26,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:26,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:26,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:28,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:28,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:28,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:28,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:29,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:34,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:35,916 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:17:37,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:37,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:17:37,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:17:39,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644287630] [2020-07-20 13:17:39,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:17:39,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 13:17:39,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133383721] [2020-07-20 13:17:39,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 13:17:39,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:17:39,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 13:17:39,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2192, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 13:17:39,622 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 23 states. [2020-07-20 13:17:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:17:45,525 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2020-07-20 13:17:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 13:17:45,526 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2020-07-20 13:17:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:17:45,527 INFO L225 Difference]: With dead ends: 99 [2020-07-20 13:17:45,528 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 13:17:45,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=422, Invalid=3868, Unknown=0, NotChecked=0, Total=4290 [2020-07-20 13:17:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 13:17:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-07-20 13:17:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-20 13:17:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 115 transitions. [2020-07-20 13:17:45,536 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 115 transitions. Word has length 114 [2020-07-20 13:17:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:17:45,537 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 115 transitions. [2020-07-20 13:17:45,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 13:17:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 115 transitions. [2020-07-20 13:17:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 13:17:45,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:17:45,538 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:17:45,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:17:45,753 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:17:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:17:45,754 INFO L82 PathProgramCache]: Analyzing trace with hash -445760116, now seen corresponding path program 15 times [2020-07-20 13:17:45,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:17:45,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783841042] [2020-07-20 13:17:45,754 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:17:45,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:17:45,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:17:45,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 13:17:45,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:17:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-20 13:17:49,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:17:50,814 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:17:52,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:55,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:55,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:55,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:17:57,208 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:17:58,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:00,170 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:18:01,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:03,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:03,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:03,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:05,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:05,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:05,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:07,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:09,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:09,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:09,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:10,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:10,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:10,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:11,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:12,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:12,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:12,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:15,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:16,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:16,586 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:18:16,586 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:18:16,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 41 proven. 451 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-20 13:18:16,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783841042] [2020-07-20 13:18:16,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:18:16,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 44] total 60 [2020-07-20 13:18:16,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752071065] [2020-07-20 13:18:16,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-20 13:18:16,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:18:16,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-20 13:18:16,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3343, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 13:18:16,686 INFO L87 Difference]: Start difference. First operand 89 states and 115 transitions. Second operand 60 states. [2020-07-20 13:18:21,275 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:18:31,460 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 13:18:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:18:34,667 INFO L93 Difference]: Finished difference Result 114 states and 151 transitions. [2020-07-20 13:18:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 13:18:34,668 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 107 [2020-07-20 13:18:34,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:18:34,670 INFO L225 Difference]: With dead ends: 114 [2020-07-20 13:18:34,670 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 13:18:34,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 149 SyntacticMatches, 6 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=744, Invalid=7446, Unknown=0, NotChecked=0, Total=8190 [2020-07-20 13:18:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 13:18:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-07-20 13:18:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 13:18:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2020-07-20 13:18:34,684 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 107 [2020-07-20 13:18:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:18:34,684 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2020-07-20 13:18:34,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-20 13:18:34,685 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2020-07-20 13:18:34,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 13:18:34,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:18:34,686 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:18:34,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:18:34,888 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:18:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:18:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash -10155430, now seen corresponding path program 16 times [2020-07-20 13:18:34,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:18:34,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44706589] [2020-07-20 13:18:34,889 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:18:35,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:18:35,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:18:35,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-20 13:18:35,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:18:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 12 proven. 355 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2020-07-20 13:18:37,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:18:38,945 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:18:39,811 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:18:40,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:40,989 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:18:41,269 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:18:42,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:44,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:44,836 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:18:45,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:45,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:45,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:46,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:47,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:47,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:47,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:48,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:50,073 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:18:53,042 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:18:54,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:57,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:57,453 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:18:57,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:18:58,210 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-07-20 13:18:59,399 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:18:59,693 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:18:59,986 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:00,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44706589] [2020-07-20 13:19:00,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:19:00,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 13:19:00,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240394405] [2020-07-20 13:19:00,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 13:19:00,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:19:00,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 13:19:00,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2386, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 13:19:00,896 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand 25 states. [2020-07-20 13:19:07,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:19:07,782 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2020-07-20 13:19:07,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 13:19:07,782 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-07-20 13:19:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:19:07,783 INFO L225 Difference]: With dead ends: 102 [2020-07-20 13:19:07,783 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 13:19:07,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=458, Invalid=4372, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 13:19:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 13:19:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-07-20 13:19:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 13:19:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2020-07-20 13:19:07,794 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 121 [2020-07-20 13:19:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:19:07,795 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2020-07-20 13:19:07,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 13:19:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2020-07-20 13:19:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 13:19:07,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:19:07,796 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:19:08,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:19:08,010 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:19:08,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:19:08,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1189861785, now seen corresponding path program 17 times [2020-07-20 13:19:08,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:19:08,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682456756] [2020-07-20 13:19:08,011 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:19:08,199 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:19:08,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:19:08,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-20 13:19:08,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:19:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 14 proven. 400 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-07-20 13:19:10,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:19:12,475 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:12,800 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:13,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:14,798 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:15,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:15,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:15,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:16,859 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:17,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:18,960 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:19,246 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:19,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:21,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:21,879 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:19:22,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:24,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:29,238 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:30,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:33,395 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 13:19:33,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:33,400 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:19:33,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:34,841 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:19:35,394 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:36,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682456756] [2020-07-20 13:19:36,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:19:36,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-20 13:19:36,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594752267] [2020-07-20 13:19:36,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 13:19:36,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:19:36,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 13:19:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2582, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 13:19:36,311 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand 25 states. [2020-07-20 13:19:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:19:43,186 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2020-07-20 13:19:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 13:19:43,186 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 128 [2020-07-20 13:19:43,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:19:43,188 INFO L225 Difference]: With dead ends: 102 [2020-07-20 13:19:43,188 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 13:19:43,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=486, Invalid=4626, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 13:19:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 13:19:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2020-07-20 13:19:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 13:19:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2020-07-20 13:19:43,197 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 128 [2020-07-20 13:19:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:19:43,197 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2020-07-20 13:19:43,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 13:19:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2020-07-20 13:19:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 13:19:43,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:19:43,199 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:19:43,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:19:43,402 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:19:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:19:43,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1739770251, now seen corresponding path program 18 times [2020-07-20 13:19:43,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:19:43,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028643847] [2020-07-20 13:19:43,404 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:19:43,600 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:19:43,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:19:43,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 13:19:43,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:19:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 22 proven. 310 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2020-07-20 13:19:47,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:19:48,554 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:49,399 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:51,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:54,240 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:19:54,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:54,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:54,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:55,619 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:19:58,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:59,932 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:00,291 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:00,658 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:01,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:01,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:01,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:02,878 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:03,428 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:03,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:03,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:03,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:04,978 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:06,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:08,058 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:08,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:09,672 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:20:10,062 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:20:10,459 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:10,629 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:20:10,871 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:11,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:11,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:11,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:12,342 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:20:12,718 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:20:13,117 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:13,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:14,586 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:20:14,960 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:20:15,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:15,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:15,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:16,578 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:20:17,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:17,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:17,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:18,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:18,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:18,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:20,014 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:20:20,391 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:20:22,136 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:20:22,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:24,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:24,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:24,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 44 proven. 528 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-07-20 13:20:24,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028643847] [2020-07-20 13:20:24,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:20:24,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 47] total 64 [2020-07-20 13:20:24,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619036921] [2020-07-20 13:20:24,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-20 13:20:24,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:20:24,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-20 13:20:24,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3821, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 13:20:24,860 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand 64 states. [2020-07-20 13:20:29,121 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:20:38,116 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 13:20:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:20:42,493 INFO L93 Difference]: Finished difference Result 117 states and 156 transitions. [2020-07-20 13:20:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 13:20:42,493 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 114 [2020-07-20 13:20:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:20:42,495 INFO L225 Difference]: With dead ends: 117 [2020-07-20 13:20:42,495 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 13:20:42,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 156 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=826, Invalid=8486, Unknown=0, NotChecked=0, Total=9312 [2020-07-20 13:20:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 13:20:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2020-07-20 13:20:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 13:20:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2020-07-20 13:20:42,505 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 114 [2020-07-20 13:20:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:20:42,506 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2020-07-20 13:20:42,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-20 13:20:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2020-07-20 13:20:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 13:20:42,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:20:42,507 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:20:42,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:20:42,722 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:20:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:20:42,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2100339370, now seen corresponding path program 19 times [2020-07-20 13:20:42,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:20:42,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685052233] [2020-07-20 13:20:42,724 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:20:42,945 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:20:42,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:20:42,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 13:20:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:20:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 14 proven. 453 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2020-07-20 13:20:46,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:20:47,002 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:20:47,358 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:47,692 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:48,011 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:48,321 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:48,624 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:49,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:49,884 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:20:50,180 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:50,472 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:51,058 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:51,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:52,395 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:20:52,971 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:53,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:53,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:53,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:55,144 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:20:55,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:55,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:55,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:57,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:57,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:57,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:57,956 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:20:58,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:59,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:59,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:59,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:00,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:00,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:00,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:01,706 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:21:02,028 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:02,337 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:02,646 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:02,971 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:03,285 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:03,598 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:03,910 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:05,918 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:06,775 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:07,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:10,090 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:10,369 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:10,671 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:10,973 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:11,282 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:12,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:12,256 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:21:12,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:14,121 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-07-20 13:21:15,713 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:21:16,572 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:16,856 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:17,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685052233] [2020-07-20 13:21:17,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:21:17,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-20 13:21:17,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71861547] [2020-07-20 13:21:17,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 13:21:17,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:17,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 13:21:17,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2792, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 13:21:17,515 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand 27 states. [2020-07-20 13:21:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:26,207 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2020-07-20 13:21:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 13:21:26,218 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 135 [2020-07-20 13:21:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:26,219 INFO L225 Difference]: With dead ends: 105 [2020-07-20 13:21:26,219 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 13:21:26,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=524, Invalid=5176, Unknown=0, NotChecked=0, Total=5700 [2020-07-20 13:21:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 13:21:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-07-20 13:21:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-20 13:21:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 129 transitions. [2020-07-20 13:21:26,228 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 129 transitions. Word has length 135 [2020-07-20 13:21:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:26,229 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 129 transitions. [2020-07-20 13:21:26,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 13:21:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 129 transitions. [2020-07-20 13:21:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 13:21:26,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:26,230 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:26,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:26,443 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 94405495, now seen corresponding path program 20 times [2020-07-20 13:21:26,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:26,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698847438] [2020-07-20 13:21:26,445 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:26,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:21:26,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:26,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-20 13:21:26,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 12 proven. 405 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-20 13:21:29,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:30,717 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:21:31,576 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:31,887 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:32,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:33,357 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:33,682 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:33,966 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:21:34,100 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:34,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:34,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:34,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:35,926 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:36,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:37,307 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:21:37,614 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:38,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:39,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:39,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:39,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:40,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:40,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:40,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:41,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:41,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:41,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:42,500 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:21:44,173 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:46,453 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:46,763 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:48,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:49,063 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:21:49,927 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:50,768 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:51,093 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:53,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:53,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:21:53,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:21:55,244 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:21:56,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698847438] [2020-07-20 13:21:56,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:21:56,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-20 13:21:56,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134397104] [2020-07-20 13:21:56,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 13:21:56,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:56,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 13:21:56,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2588, Unknown=1, NotChecked=0, Total=2756 [2020-07-20 13:21:56,715 INFO L87 Difference]: Start difference. First operand 97 states and 129 transitions. Second operand 27 states. [2020-07-20 13:22:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:22:05,162 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2020-07-20 13:22:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 13:22:05,170 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 128 [2020-07-20 13:22:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:22:05,171 INFO L225 Difference]: With dead ends: 105 [2020-07-20 13:22:05,171 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 13:22:05,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=493, Invalid=4908, Unknown=1, NotChecked=0, Total=5402 [2020-07-20 13:22:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 13:22:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2020-07-20 13:22:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 13:22:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2020-07-20 13:22:05,181 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 128 [2020-07-20 13:22:05,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:22:05,181 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2020-07-20 13:22:05,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 13:22:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2020-07-20 13:22:05,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 13:22:05,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:22:05,183 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:22:05,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:05,395 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:22:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:22:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1967581334, now seen corresponding path program 21 times [2020-07-20 13:22:05,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:22:05,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776440308] [2020-07-20 13:22:05,396 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:05,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:22:05,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:22:05,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-07-20 13:22:05,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:22:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 24 proven. 355 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2020-07-20 13:22:09,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:22:12,285 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:12,644 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:13,032 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:13,201 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:22:13,438 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:14,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:15,357 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:22:15,972 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:16,376 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:16,788 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:17,164 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:17,330 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:22:18,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:19,903 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:20,773 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:21,060 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:21,356 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:21,649 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:22,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:22,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:22,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:25,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:27,491 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:28,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:28,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:28,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:30,323 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:31,187 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:31,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:32,707 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 13:22:32,855 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:22:33,237 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:33,848 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:34,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:35,886 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:36,184 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:36,495 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:37,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:38,224 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 13:22:38,393 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:22:38,579 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:22:38,842 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:39,032 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:22:39,141 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:22:39,300 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:39,540 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:22:40,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:40,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:40,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:41,314 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:22:41,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:43,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:44,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:45,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:45,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:45,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:46,718 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:22:48,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:54,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:54,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:54,457 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:22:54,457 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 13:22:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 43 proven. 611 refuted. 4 times theorem prover too weak. 124 trivial. 0 not checked. [2020-07-20 13:22:54,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776440308] [2020-07-20 13:22:54,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:22:54,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 50] total 68 [2020-07-20 13:22:54,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715184977] [2020-07-20 13:22:54,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-20 13:22:54,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:22:54,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-20 13:22:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=4331, Unknown=2, NotChecked=0, Total=4556 [2020-07-20 13:22:54,544 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand 68 states. [2020-07-20 13:22:58,745 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:23:11,123 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 13:23:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:23:13,630 INFO L93 Difference]: Finished difference Result 120 states and 161 transitions. [2020-07-20 13:23:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 13:23:13,638 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 121 [2020-07-20 13:23:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:23:13,640 INFO L225 Difference]: With dead ends: 120 [2020-07-20 13:23:13,640 INFO L226 Difference]: Without dead ends: 113 [2020-07-20 13:23:13,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 167 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=910, Invalid=9594, Unknown=2, NotChecked=0, Total=10506 [2020-07-20 13:23:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-20 13:23:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-07-20 13:23:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 13:23:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-07-20 13:23:13,649 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 121 [2020-07-20 13:23:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:23:13,649 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-07-20 13:23:13,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-20 13:23:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-07-20 13:23:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 13:23:13,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:23:13,651 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:23:13,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:23:13,853 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:23:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:23:13,853 INFO L82 PathProgramCache]: Analyzing trace with hash 789747280, now seen corresponding path program 22 times [2020-07-20 13:23:13,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:23:13,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943622280] [2020-07-20 13:23:13,854 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:23:14,134 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:23:14,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:23:14,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-07-20 13:23:14,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:23:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 12 proven. 458 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-07-20 13:23:17,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:23:18,795 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:23:19,121 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:19,412 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:19,708 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:20,003 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:20,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:21,155 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:23:21,461 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:23:21,761 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:22,047 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:22,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:22,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:22,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:24,206 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:24,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:25,455 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:23:26,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:26,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:26,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:27,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:28,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:29,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:29,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:29,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:30,956 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:31,524 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:31,828 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:32,138 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:32,718 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:33,000 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:34,453 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:23:35,025 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:35,314 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:35,619 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:36,481 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:37,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:38,636 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:38,992 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:39,283 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:39,859 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:40,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:40,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:23:40,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:23:42,822 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:43,127 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:23:44,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943622280] [2020-07-20 13:23:44,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:23:44,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-20 13:23:44,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4660312] [2020-07-20 13:23:44,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 13:23:44,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:23:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 13:23:44,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2796, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 13:23:44,059 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 29 states. [2020-07-20 13:23:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:23:54,252 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2020-07-20 13:23:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 13:23:54,260 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 135 [2020-07-20 13:23:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:23:54,262 INFO L225 Difference]: With dead ends: 108 [2020-07-20 13:23:54,262 INFO L226 Difference]: Without dead ends: 104 [2020-07-20 13:23:54,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=532, Invalid=5474, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 13:23:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-20 13:23:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-07-20 13:23:54,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 13:23:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 134 transitions. [2020-07-20 13:23:54,272 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 134 transitions. Word has length 135 [2020-07-20 13:23:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:23:54,272 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 134 transitions. [2020-07-20 13:23:54,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 13:23:54,273 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 134 transitions. [2020-07-20 13:23:54,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 13:23:54,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:23:54,274 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:23:54,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:23:54,489 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:23:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:23:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash 310729137, now seen corresponding path program 23 times [2020-07-20 13:23:54,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:23:54,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566744801] [2020-07-20 13:23:54,489 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:23:54,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:23:54,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:23:54,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-07-20 13:23:54,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:23:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 14 proven. 509 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2020-07-20 13:23:58,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:23:59,378 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:23:59,666 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:00,244 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:00,817 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:01,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:02,289 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:24:02,580 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:02,862 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:03,156 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:03,461 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:04,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:04,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:04,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:05,623 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:06,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:07,548 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:08,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:09,462 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:09,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:10,902 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:24:11,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:11,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:11,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:12,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:13,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:14,524 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:24:14,838 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:15,136 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:15,426 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:15,720 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:16,011 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:16,313 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:16,608 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:16,904 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:18,426 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:24:18,840 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:19,233 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:19,523 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:19,809 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:20,104 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:20,395 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:20,688 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:21,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:24,136 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:24:24,425 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:24,716 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:25,075 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:25,361 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:25,613 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:24:25,773 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:25,948 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:24:26,201 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:26,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:26,940 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:24:26,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:28,484 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:24:28,832 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:29,177 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:29,492 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:29,814 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:30,127 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:30,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566744801] [2020-07-20 13:24:30,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:24:30,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-20 13:24:30,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290951375] [2020-07-20 13:24:30,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 13:24:30,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:24:30,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 13:24:30,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3010, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 13:24:30,857 INFO L87 Difference]: Start difference. First operand 100 states and 134 transitions. Second operand 29 states. [2020-07-20 13:24:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:24:41,919 INFO L93 Difference]: Finished difference Result 108 states and 140 transitions. [2020-07-20 13:24:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 13:24:41,920 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2020-07-20 13:24:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:24:41,921 INFO L225 Difference]: With dead ends: 108 [2020-07-20 13:24:41,921 INFO L226 Difference]: Without dead ends: 104 [2020-07-20 13:24:41,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 154 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=562, Invalid=5758, Unknown=0, NotChecked=0, Total=6320 [2020-07-20 13:24:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-20 13:24:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-07-20 13:24:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 13:24:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-07-20 13:24:41,931 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 142 [2020-07-20 13:24:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:24:41,932 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-07-20 13:24:41,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 13:24:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-07-20 13:24:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 13:24:41,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:24:41,933 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:24:42,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:24:42,147 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:24:42,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:24:42,148 INFO L82 PathProgramCache]: Analyzing trace with hash 136515168, now seen corresponding path program 24 times [2020-07-20 13:24:42,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:24:42,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650892022] [2020-07-20 13:24:42,148 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:24:42,480 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:24:42,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:24:42,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 241 conjunts are in the unsatisfiable core [2020-07-20 13:24:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:24:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 26 proven. 562 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked. [2020-07-20 13:24:47,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:24:48,884 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:24:49,195 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:49,536 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:49,853 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:50,183 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:50,557 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:50,734 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:24:50,940 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:51,244 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:51,546 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:51,862 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:52,161 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:52,485 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:53,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:53,900 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:24:54,210 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:54,519 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:54,848 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:55,173 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:55,467 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:55,759 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:56,054 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:56,348 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:56,701 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:56,994 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:57,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:57,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:57,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:58,557 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:24:58,848 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:59,139 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:59,446 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:24:59,760 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:00,058 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:00,349 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:00,642 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:01,217 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:01,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:01,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:01,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:02,668 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:02,986 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:03,291 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:03,593 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:03,906 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:04,258 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:04,426 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:25:04,533 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:25:04,682 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:04,930 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:25:05,046 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:05,359 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:05,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:06,981 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:07,340 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:07,508 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 13:25:07,740 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:08,071 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:08,385 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:08,684 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:08,983 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:09,285 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:09,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:09,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:09,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:10,785 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:11,091 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:11,409 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:11,716 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:12,019 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:12,327 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:12,621 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:13,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:13,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:13,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:14,243 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:14,539 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:14,840 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:15,161 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:15,473 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:15,768 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:16,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:16,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:16,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:17,242 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:17,548 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:17,847 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:18,139 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:18,432 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:19,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:19,927 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:25:20,245 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:20,557 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:20,864 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:21,198 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:21,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:21,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:21,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:22,986 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:23,331 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:23,660 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:24,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:24,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:24,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:25,153 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:25,457 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:26,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:26,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:26,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:27,006 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:27,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:28,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:28,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:28,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:29,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:31,484 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:31,790 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:32,112 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:32,421 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:33,985 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 13:25:34,358 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:34,675 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:34,979 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:35,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:37,580 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:37,883 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 13:25:38,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:38,681 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 13:25:38,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:39,401 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-07-20 13:25:40,497 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:25:41,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650892022] [2020-07-20 13:25:41,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:25:41,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-07-20 13:25:41,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061442911] [2020-07-20 13:25:41,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 13:25:41,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:25:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 13:25:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=5297, Unknown=0, NotChecked=0, Total=5550 [2020-07-20 13:25:41,330 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 35 states.