/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:51:03,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:51:03,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:51:03,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:51:03,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:51:03,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:51:03,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:51:03,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:51:03,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:51:03,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:51:03,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:51:03,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:51:03,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:51:03,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:51:03,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:51:03,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:51:03,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:51:03,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:51:03,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:51:03,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:51:03,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:51:03,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:51:03,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:51:03,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:51:03,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:51:03,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:51:03,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:51:03,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:51:03,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:51:03,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:51:03,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:51:03,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:51:03,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:51:03,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:51:03,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:51:03,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:51:03,998 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:51:04,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:51:04,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:51:04,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:51:04,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:51:04,056 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:51:04,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:51:04,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:51:04,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:51:04,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:51:04,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:51:04,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:51:04,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:51:04,059 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:51:04,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:51:04,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:51:04,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:51:04,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:51:04,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:51:04,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:51:04,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:51:04,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:51:04,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:51:04,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:51:04,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:51:04,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:51:04,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:51:04,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:51:04,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:51:04,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:51:04,547 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:51:04,548 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:51:04,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2020-12-22 05:51:04,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba90f474/b02e50ed51744c23b20a4d8b2c120944/FLAGbe2c4b09d [2020-12-22 05:51:05,194 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:51:05,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2020-12-22 05:51:05,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba90f474/b02e50ed51744c23b20a4d8b2c120944/FLAGbe2c4b09d [2020-12-22 05:51:05,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba90f474/b02e50ed51744c23b20a4d8b2c120944 [2020-12-22 05:51:05,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:51:05,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:51:05,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:51:05,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:51:05,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:51:05,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:05,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39b854b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05, skipping insertion in model container [2020-12-22 05:51:05,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:05,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:51:05,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:51:05,849 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound10.c[520,533] [2020-12-22 05:51:05,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:51:05,886 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:51:05,907 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound10.c[520,533] [2020-12-22 05:51:05,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:51:05,952 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:51:05,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05 WrapperNode [2020-12-22 05:51:05,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:51:05,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:51:05,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:51:05,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:51:05,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:05,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:06,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:51:06,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:51:06,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:51:06,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:51:06,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:06,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:06,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:06,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:06,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:06,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:06,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (1/1) ... [2020-12-22 05:51:06,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:51:06,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:51:06,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:51:06,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:51:06,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (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 [2020-12-22 05:51:06,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:51:06,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:51:06,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:51:06,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:51:06,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:51:06,403 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 05:51:06,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:51:06 BoogieIcfgContainer [2020-12-22 05:51:06,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:51:06,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:51:06,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:51:06,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:51:06,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:51:05" (1/3) ... [2020-12-22 05:51:06,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3288249b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:51:06, skipping insertion in model container [2020-12-22 05:51:06,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:51:05" (2/3) ... [2020-12-22 05:51:06,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3288249b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:51:06, skipping insertion in model container [2020-12-22 05:51:06,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:51:06" (3/3) ... [2020-12-22 05:51:06,414 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound10.c [2020-12-22 05:51:06,421 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:51:06,426 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-22 05:51:06,445 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-22 05:51:06,497 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:51:06,497 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:51:06,498 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:51:06,498 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:51:06,498 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:51:06,498 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:51:06,498 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:51:06,499 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:51:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-22 05:51:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:51:06,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:51:06,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:51:06,561 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:51:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:51:06,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-22 05:51:06,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:51:06,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979518003] [2020-12-22 05:51:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:51:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:51:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:51:06,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979518003] [2020-12-22 05:51:06,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:51:06,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:51:06,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86056965] [2020-12-22 05:51:06,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:51:06,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:06,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:51:06,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:51:06,811 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-22 05:51:06,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:51:06,835 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-12-22 05:51:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:51:06,837 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 05:51:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:51:06,847 INFO L225 Difference]: With dead ends: 63 [2020-12-22 05:51:06,848 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 05:51:06,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:51:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 05:51:06,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 05:51:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 05:51:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 05:51:06,895 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 7 [2020-12-22 05:51:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:51:06,896 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 05:51:06,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:51:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 05:51:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:51:06,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:51:06,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:51:06,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:51:06,898 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:51:06,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:51:06,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-22 05:51:06,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:51:06,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598851247] [2020-12-22 05:51:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:51:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:51:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:51:07,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598851247] [2020-12-22 05:51:07,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:51:07,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:51:07,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894488396] [2020-12-22 05:51:07,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:51:07,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:07,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:51:07,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:51:07,049 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 4 states. [2020-12-22 05:51:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:51:07,217 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 05:51:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:51:07,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 05:51:07,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:51:07,221 INFO L225 Difference]: With dead ends: 54 [2020-12-22 05:51:07,221 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 05:51:07,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:51:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 05:51:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-12-22 05:51:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 05:51:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-12-22 05:51:07,248 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 7 [2020-12-22 05:51:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:51:07,248 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-12-22 05:51:07,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:51:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-12-22 05:51:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 05:51:07,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:51:07,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:51:07,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 05:51:07,255 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:51:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:51:07,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1186787538, now seen corresponding path program 1 times [2020-12-22 05:51:07,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:51:07,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207430542] [2020-12-22 05:51:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:51:07,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:51:07,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2161162] [2020-12-22 05:51:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:51:07,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 05:51:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:51:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:51:07,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207430542] [2020-12-22 05:51:07,548 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:51:07,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2161162] [2020-12-22 05:51:07,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:51:07,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:51:07,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474563847] [2020-12-22 05:51:07,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:51:07,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:07,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:51:07,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:51:07,554 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 6 states. [2020-12-22 05:51:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:51:07,702 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-22 05:51:07,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:51:07,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-22 05:51:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:51:07,707 INFO L225 Difference]: With dead ends: 51 [2020-12-22 05:51:07,707 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 05:51:07,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:51:07,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 05:51:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-22 05:51:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 05:51:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-22 05:51:07,735 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 9 [2020-12-22 05:51:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:51:07,735 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-22 05:51:07,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:51:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-22 05:51:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:51:07,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:51:07,738 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:51:07,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 05:51:07,952 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:51:07,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:51:07,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1783845574, now seen corresponding path program 1 times [2020-12-22 05:51:07,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:51:07,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722014236] [2020-12-22 05:51:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:51:07,970 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:51:07,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071477158] [2020-12-22 05:51:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:51:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:51:08,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:51:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:51:08,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722014236] [2020-12-22 05:51:08,092 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:51:08,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071477158] [2020-12-22 05:51:08,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:51:08,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:51:08,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203188807] [2020-12-22 05:51:08,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:51:08,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:08,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:51:08,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:51:08,095 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 5 states. [2020-12-22 05:51:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:51:08,198 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-12-22 05:51:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:51:08,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-22 05:51:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:51:08,199 INFO L225 Difference]: With dead ends: 61 [2020-12-22 05:51:08,199 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 05:51:08,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:51:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 05:51:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-12-22 05:51:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 05:51:08,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-12-22 05:51:08,208 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 14 [2020-12-22 05:51:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:51:08,208 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-12-22 05:51:08,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:51:08,209 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-12-22 05:51:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:51:08,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:51:08,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:51:08,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:08,424 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:51:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:51:08,425 INFO L82 PathProgramCache]: Analyzing trace with hash -583489763, now seen corresponding path program 1 times [2020-12-22 05:51:08,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:51:08,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459555860] [2020-12-22 05:51:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:51:08,439 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:51:08,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005450717] [2020-12-22 05:51:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:51:08,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 05:51:08,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:51:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:51:08,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459555860] [2020-12-22 05:51:08,573 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:51:08,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005450717] [2020-12-22 05:51:08,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:51:08,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:51:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286823135] [2020-12-22 05:51:08,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:51:08,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:08,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:51:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:51:08,575 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 7 states. [2020-12-22 05:51:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:51:08,713 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 05:51:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:51:08,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 05:51:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:51:08,714 INFO L225 Difference]: With dead ends: 58 [2020-12-22 05:51:08,715 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 05:51:08,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:51:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 05:51:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 05:51:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 05:51:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 05:51:08,722 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 16 [2020-12-22 05:51:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:51:08,723 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 05:51:08,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:51:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 05:51:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 05:51:08,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:51:08,724 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:51:08,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:08,940 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:51:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:51:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash -435278385, now seen corresponding path program 2 times [2020-12-22 05:51:08,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:51:08,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599595668] [2020-12-22 05:51:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:51:08,955 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:51:08,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441628460] [2020-12-22 05:51:08,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:09,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:51:09,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:51:09,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 05:51:09,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:51:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:51:09,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599595668] [2020-12-22 05:51:09,074 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:51:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441628460] [2020-12-22 05:51:09,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:51:09,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:51:09,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025871609] [2020-12-22 05:51:09,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:51:09,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:09,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:51:09,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:51:09,079 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 6 states. [2020-12-22 05:51:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:51:09,205 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-22 05:51:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:51:09,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-22 05:51:09,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:51:09,209 INFO L225 Difference]: With dead ends: 68 [2020-12-22 05:51:09,209 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 05:51:09,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:51:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 05:51:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2020-12-22 05:51:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 05:51:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-22 05:51:09,229 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 21 [2020-12-22 05:51:09,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:51:09,229 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-22 05:51:09,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:51:09,230 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-22 05:51:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 05:51:09,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:51:09,230 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:51:09,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:09,445 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:51:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:51:09,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1690544526, now seen corresponding path program 2 times [2020-12-22 05:51:09,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:51:09,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888428199] [2020-12-22 05:51:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:51:09,471 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:51:09,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440979265] [2020-12-22 05:51:09,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:09,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:51:09,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:51:09,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 05:51:09,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:51:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:51:09,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888428199] [2020-12-22 05:51:09,616 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:51:09,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440979265] [2020-12-22 05:51:09,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:51:09,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:51:09,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813498262] [2020-12-22 05:51:09,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:51:09,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:09,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:51:09,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:51:09,618 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 7 states. [2020-12-22 05:51:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:51:09,750 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-22 05:51:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:51:09,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-22 05:51:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:51:09,752 INFO L225 Difference]: With dead ends: 64 [2020-12-22 05:51:09,752 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 05:51:09,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:51:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 05:51:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-12-22 05:51:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 05:51:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-22 05:51:09,759 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 23 [2020-12-22 05:51:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:51:09,760 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-22 05:51:09,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:51:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-22 05:51:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 05:51:09,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:51:09,761 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:51:09,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 05:51:09,976 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:51:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:51:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1115495499, now seen corresponding path program 1 times [2020-12-22 05:51:09,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:51:09,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224944514] [2020-12-22 05:51:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:51:09,993 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:51:09,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463372917] [2020-12-22 05:51:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:51:10,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 05:51:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:51:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:51:10,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224944514] [2020-12-22 05:51:10,161 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:51:10,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463372917] [2020-12-22 05:51:10,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:51:10,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:51:10,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800077700] [2020-12-22 05:51:10,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:51:10,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:10,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:51:10,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:51:10,163 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 8 states. [2020-12-22 05:51:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:51:10,311 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-12-22 05:51:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:51:10,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-22 05:51:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:51:10,312 INFO L225 Difference]: With dead ends: 61 [2020-12-22 05:51:10,312 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 05:51:10,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:51:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 05:51:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-22 05:51:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 05:51:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-12-22 05:51:10,319 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 25 [2020-12-22 05:51:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:51:10,319 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-12-22 05:51:10,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:51:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-12-22 05:51:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 05:51:10,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:51:10,321 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:51:10,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:10,534 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:51:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:51:10,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1559508070, now seen corresponding path program 3 times [2020-12-22 05:51:10,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:51:10,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338760861] [2020-12-22 05:51:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:51:10,547 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:51:10,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850281751] [2020-12-22 05:51:10,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:10,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 05:51:10,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:51:10,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 05:51:10,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:51:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 05:51:10,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338760861] [2020-12-22 05:51:10,686 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:51:10,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850281751] [2020-12-22 05:51:10,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:51:10,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:51:10,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328990570] [2020-12-22 05:51:10,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:51:10,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:10,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:51:10,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:51:10,688 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 6 states. [2020-12-22 05:51:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:51:10,767 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 05:51:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:51:10,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-22 05:51:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:51:10,768 INFO L225 Difference]: With dead ends: 50 [2020-12-22 05:51:10,768 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 05:51:10,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:51:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 05:51:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 05:51:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 05:51:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-22 05:51:10,774 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 28 [2020-12-22 05:51:10,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:51:10,774 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-22 05:51:10,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:51:10,774 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-22 05:51:10,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 05:51:10,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:51:10,775 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:51:10,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:10,982 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:51:10,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:51:10,983 INFO L82 PathProgramCache]: Analyzing trace with hash 256486781, now seen corresponding path program 3 times [2020-12-22 05:51:10,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:51:10,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389930297] [2020-12-22 05:51:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:51:10,995 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:51:10,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156872471] [2020-12-22 05:51:10,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:51:11,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 05:51:11,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:51:11,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 05:51:11,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:51:39,310 WARN L197 SmtUtils]: Spent 14.57 s on a formula simplification that was a NOOP. DAG size: 26 [2020-12-22 05:51:49,490 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 18 [2020-12-22 05:51:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 05:51:51,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389930297] [2020-12-22 05:51:51,537 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:51:51,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156872471] [2020-12-22 05:51:51,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:51:51,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:51:51,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066764027] [2020-12-22 05:51:51,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:51:51,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:51,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:51:51,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=61, Unknown=8, NotChecked=0, Total=90 [2020-12-22 05:51:51,540 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 10 states. [2020-12-22 05:51:59,855 WARN L197 SmtUtils]: Spent 8.29 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 05:52:08,774 WARN L197 SmtUtils]: Spent 8.90 s on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-12-22 05:52:27,769 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0))) (and (= c_ULTIMATE.start_main_~s~0 (+ c_ULTIMATE.start_main_~t~0 .cse0)) (= (+ (* 2 (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~s~0)) (* 2 .cse0) (* 2 c_ULTIMATE.start_main_~s~0)) (+ (* c_ULTIMATE.start_main_~s~0 c_ULTIMATE.start_main_~s~0) (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0) 1)) (let ((.cse1 (= c_ULTIMATE.start_main_~s~0 (+ .cse0 (* 2 c_ULTIMATE.start_main_~a~0) 1)))) (or (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse1)) (and (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse1))) (= (+ (* c_ULTIMATE.start_main_~t~0 c_ULTIMATE.start_main_~t~0) 1) (+ (* 2 c_ULTIMATE.start_main_~t~0) (* 4 .cse0))))) is different from false [2020-12-22 05:52:35,914 WARN L197 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-12-22 05:52:49,699 WARN L197 SmtUtils]: Spent 13.67 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-22 05:52:56,673 WARN L197 SmtUtils]: Spent 6.89 s on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-12-22 05:52:59,992 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-22 05:53:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:53:00,761 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 05:53:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 05:53:00,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-22 05:53:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:53:00,763 INFO L225 Difference]: With dead ends: 46 [2020-12-22 05:53:00,763 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 05:53:00,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 100.1s TimeCoverageRelationStatistics Valid=79, Invalid=184, Unknown=13, NotChecked=30, Total=306 [2020-12-22 05:53:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 05:53:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-22 05:53:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 05:53:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 05:53:00,783 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-22 05:53:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:53:00,783 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 05:53:00,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:53:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 05:53:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 05:53:00,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:53:00,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:53:00,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 05:53:00,993 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:53:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:53:00,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1670816768, now seen corresponding path program 2 times [2020-12-22 05:53:00,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:53:00,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271618375] [2020-12-22 05:53:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:53:01,010 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:53:01,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38971063] [2020-12-22 05:53:01,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:53:01,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 05:53:01,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:53:01,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:53:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:53:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 05:53:01,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271618375] [2020-12-22 05:53:01,228 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:53:01,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38971063] [2020-12-22 05:53:01,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:53:01,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 05:53:01,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400780477] [2020-12-22 05:53:01,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:53:01,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:53:01,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:53:01,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:53:01,230 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 8 states. [2020-12-22 05:53:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:53:05,481 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-22 05:53:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:53:05,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-22 05:53:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:53:05,482 INFO L225 Difference]: With dead ends: 33 [2020-12-22 05:53:05,482 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 05:53:05,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:53:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 05:53:05,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 05:53:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 05:53:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 05:53:05,484 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-12-22 05:53:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:53:05,485 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 05:53:05,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:53:05,486 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 05:53:05,486 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 05:53:05,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:53:05,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 05:53:16,670 WARN L197 SmtUtils]: Spent 10.83 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-22 05:53:35,072 WARN L197 SmtUtils]: Spent 18.40 s on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 05:53:41,696 WARN L197 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2020-12-22 05:53:55,032 WARN L197 SmtUtils]: Spent 13.33 s on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 05:54:11,174 WARN L197 SmtUtils]: Spent 16.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 38